| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package reflect_test |
| |
| import ( |
| "bytes" |
| "encoding/base64" |
| "flag" |
| "fmt" |
| "io" |
| "math/rand" |
| "os" |
| . "reflect" |
| "runtime" |
| "sort" |
| "strconv" |
| "strings" |
| "sync" |
| "testing" |
| "time" |
| "unsafe" |
| ) |
| |
| func TestBool(t *testing.T) { |
| v := ValueOf(true) |
| if v.Bool() != true { |
| t.Fatal("ValueOf(true).Bool() = false") |
| } |
| } |
| |
| type integer int |
| type T struct { |
| a int |
| b float64 |
| c string |
| d *int |
| } |
| |
| type pair struct { |
| i interface{} |
| s string |
| } |
| |
| func isDigit(c uint8) bool { return '0' <= c && c <= '9' } |
| |
| func assert(t *testing.T, s, want string) { |
| if s != want { |
| t.Errorf("have %#q want %#q", s, want) |
| } |
| } |
| |
| func typestring(i interface{}) string { return TypeOf(i).String() } |
| |
| var typeTests = []pair{ |
| {struct{ x int }{}, "int"}, |
| {struct{ x int8 }{}, "int8"}, |
| {struct{ x int16 }{}, "int16"}, |
| {struct{ x int32 }{}, "int32"}, |
| {struct{ x int64 }{}, "int64"}, |
| {struct{ x uint }{}, "uint"}, |
| {struct{ x uint8 }{}, "uint8"}, |
| {struct{ x uint16 }{}, "uint16"}, |
| {struct{ x uint32 }{}, "uint32"}, |
| {struct{ x uint64 }{}, "uint64"}, |
| {struct{ x float32 }{}, "float32"}, |
| {struct{ x float64 }{}, "float64"}, |
| {struct{ x int8 }{}, "int8"}, |
| {struct{ x (**int8) }{}, "**int8"}, |
| {struct{ x (**integer) }{}, "**reflect_test.integer"}, |
| {struct{ x ([32]int32) }{}, "[32]int32"}, |
| {struct{ x ([]int8) }{}, "[]int8"}, |
| {struct{ x (map[string]int32) }{}, "map[string]int32"}, |
| {struct{ x (chan<- string) }{}, "chan<- string"}, |
| {struct { |
| x struct { |
| c chan *int32 |
| d float32 |
| } |
| }{}, |
| "struct { c chan *int32; d float32 }", |
| }, |
| {struct{ x (func(a int8, b int32)) }{}, "func(int8, int32)"}, |
| {struct { |
| x struct { |
| c func(chan *integer, *int8) |
| } |
| }{}, |
| "struct { c func(chan *reflect_test.integer, *int8) }", |
| }, |
| {struct { |
| x struct { |
| a int8 |
| b int32 |
| } |
| }{}, |
| "struct { a int8; b int32 }", |
| }, |
| {struct { |
| x struct { |
| a int8 |
| b int8 |
| c int32 |
| } |
| }{}, |
| "struct { a int8; b int8; c int32 }", |
| }, |
| {struct { |
| x struct { |
| a int8 |
| b int8 |
| c int8 |
| d int32 |
| } |
| }{}, |
| "struct { a int8; b int8; c int8; d int32 }", |
| }, |
| {struct { |
| x struct { |
| a int8 |
| b int8 |
| c int8 |
| d int8 |
| e int32 |
| } |
| }{}, |
| "struct { a int8; b int8; c int8; d int8; e int32 }", |
| }, |
| {struct { |
| x struct { |
| a int8 |
| b int8 |
| c int8 |
| d int8 |
| e int8 |
| f int32 |
| } |
| }{}, |
| "struct { a int8; b int8; c int8; d int8; e int8; f int32 }", |
| }, |
| {struct { |
| x struct { |
| a int8 `reflect:"hi there"` |
| } |
| }{}, |
| `struct { a int8 "reflect:\"hi there\"" }`, |
| }, |
| {struct { |
| x struct { |
| a int8 `reflect:"hi \x00there\t\n\"\\"` |
| } |
| }{}, |
| `struct { a int8 "reflect:\"hi \\x00there\\t\\n\\\"\\\\\"" }`, |
| }, |
| {struct { |
| x struct { |
| f func(args ...int) |
| } |
| }{}, |
| "struct { f func(...int) }", |
| }, |
| {struct { |
| x (interface { |
| a(func(func(int) int) func(func(int)) int) |
| b() |
| }) |
| }{}, |
| "interface { reflect_test.a(func(func(int) int) func(func(int)) int); reflect_test.b() }", |
| }, |
| } |
| |
| var valueTests = []pair{ |
| {new(int), "132"}, |
| {new(int8), "8"}, |
| {new(int16), "16"}, |
| {new(int32), "32"}, |
| {new(int64), "64"}, |
| {new(uint), "132"}, |
| {new(uint8), "8"}, |
| {new(uint16), "16"}, |
| {new(uint32), "32"}, |
| {new(uint64), "64"}, |
| {new(float32), "256.25"}, |
| {new(float64), "512.125"}, |
| {new(complex64), "532.125+10i"}, |
| {new(complex128), "564.25+1i"}, |
| {new(string), "stringy cheese"}, |
| {new(bool), "true"}, |
| {new(*int8), "*int8(0)"}, |
| {new(**int8), "**int8(0)"}, |
| {new([5]int32), "[5]int32{0, 0, 0, 0, 0}"}, |
| {new(**integer), "**reflect_test.integer(0)"}, |
| {new(map[string]int32), "map[string]int32{<can't iterate on maps>}"}, |
| {new(chan<- string), "chan<- string"}, |
| {new(func(a int8, b int32)), "func(int8, int32)(0)"}, |
| {new(struct { |
| c chan *int32 |
| d float32 |
| }), |
| "struct { c chan *int32; d float32 }{chan *int32, 0}", |
| }, |
| {new(struct{ c func(chan *integer, *int8) }), |
| "struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}", |
| }, |
| {new(struct { |
| a int8 |
| b int32 |
| }), |
| "struct { a int8; b int32 }{0, 0}", |
| }, |
| {new(struct { |
| a int8 |
| b int8 |
| c int32 |
| }), |
| "struct { a int8; b int8; c int32 }{0, 0, 0}", |
| }, |
| } |
| |
| func testType(t *testing.T, i int, typ Type, want string) { |
| s := typ.String() |
| if s != want { |
| t.Errorf("#%d: have %#q, want %#q", i, s, want) |
| } |
| } |
| |
| func TestTypes(t *testing.T) { |
| for i, tt := range typeTests { |
| testType(t, i, ValueOf(tt.i).Field(0).Type(), tt.s) |
| } |
| } |
| |
| func TestSet(t *testing.T) { |
| for i, tt := range valueTests { |
| v := ValueOf(tt.i) |
| v = v.Elem() |
| switch v.Kind() { |
| case Int: |
| v.SetInt(132) |
| case Int8: |
| v.SetInt(8) |
| case Int16: |
| v.SetInt(16) |
| case Int32: |
| v.SetInt(32) |
| case Int64: |
| v.SetInt(64) |
| case Uint: |
| v.SetUint(132) |
| case Uint8: |
| v.SetUint(8) |
| case Uint16: |
| v.SetUint(16) |
| case Uint32: |
| v.SetUint(32) |
| case Uint64: |
| v.SetUint(64) |
| case Float32: |
| v.SetFloat(256.25) |
| case Float64: |
| v.SetFloat(512.125) |
| case Complex64: |
| v.SetComplex(532.125 + 10i) |
| case Complex128: |
| v.SetComplex(564.25 + 1i) |
| case String: |
| v.SetString("stringy cheese") |
| case Bool: |
| v.SetBool(true) |
| } |
| s := valueToString(v) |
| if s != tt.s { |
| t.Errorf("#%d: have %#q, want %#q", i, s, tt.s) |
| } |
| } |
| } |
| |
| func TestSetValue(t *testing.T) { |
| for i, tt := range valueTests { |
| v := ValueOf(tt.i).Elem() |
| switch v.Kind() { |
| case Int: |
| v.Set(ValueOf(int(132))) |
| case Int8: |
| v.Set(ValueOf(int8(8))) |
| case Int16: |
| v.Set(ValueOf(int16(16))) |
| case Int32: |
| v.Set(ValueOf(int32(32))) |
| case Int64: |
| v.Set(ValueOf(int64(64))) |
| case Uint: |
| v.Set(ValueOf(uint(132))) |
| case Uint8: |
| v.Set(ValueOf(uint8(8))) |
| case Uint16: |
| v.Set(ValueOf(uint16(16))) |
| case Uint32: |
| v.Set(ValueOf(uint32(32))) |
| case Uint64: |
| v.Set(ValueOf(uint64(64))) |
| case Float32: |
| v.Set(ValueOf(float32(256.25))) |
| case Float64: |
| v.Set(ValueOf(512.125)) |
| case Complex64: |
| v.Set(ValueOf(complex64(532.125 + 10i))) |
| case Complex128: |
| v.Set(ValueOf(complex128(564.25 + 1i))) |
| case String: |
| v.Set(ValueOf("stringy cheese")) |
| case Bool: |
| v.Set(ValueOf(true)) |
| } |
| s := valueToString(v) |
| if s != tt.s { |
| t.Errorf("#%d: have %#q, want %#q", i, s, tt.s) |
| } |
| } |
| } |
| |
| var _i = 7 |
| |
| var valueToStringTests = []pair{ |
| {123, "123"}, |
| {123.5, "123.5"}, |
| {byte(123), "123"}, |
| {"abc", "abc"}, |
| {T{123, 456.75, "hello", &_i}, "reflect_test.T{123, 456.75, hello, *int(&7)}"}, |
| {new(chan *T), "*chan *reflect_test.T(&chan *reflect_test.T)"}, |
| {[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"}, |
| {&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[10]int(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"}, |
| {[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"}, |
| {&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[]int(&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"}, |
| } |
| |
| func TestValueToString(t *testing.T) { |
| for i, test := range valueToStringTests { |
| s := valueToString(ValueOf(test.i)) |
| if s != test.s { |
| t.Errorf("#%d: have %#q, want %#q", i, s, test.s) |
| } |
| } |
| } |
| |
| func TestArrayElemSet(t *testing.T) { |
| v := ValueOf(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}).Elem() |
| v.Index(4).SetInt(123) |
| s := valueToString(v) |
| const want = "[10]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}" |
| if s != want { |
| t.Errorf("[10]int: have %#q want %#q", s, want) |
| } |
| |
| v = ValueOf([]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}) |
| v.Index(4).SetInt(123) |
| s = valueToString(v) |
| const want1 = "[]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}" |
| if s != want1 { |
| t.Errorf("[]int: have %#q want %#q", s, want1) |
| } |
| } |
| |
| func TestPtrPointTo(t *testing.T) { |
| var ip *int32 |
| var i int32 = 1234 |
| vip := ValueOf(&ip) |
| vi := ValueOf(&i).Elem() |
| vip.Elem().Set(vi.Addr()) |
| if *ip != 1234 { |
| t.Errorf("got %d, want 1234", *ip) |
| } |
| |
| ip = nil |
| vp := ValueOf(&ip).Elem() |
| vp.Set(Zero(vp.Type())) |
| if ip != nil { |
| t.Errorf("got non-nil (%p), want nil", ip) |
| } |
| } |
| |
| func TestPtrSetNil(t *testing.T) { |
| var i int32 = 1234 |
| ip := &i |
| vip := ValueOf(&ip) |
| vip.Elem().Set(Zero(vip.Elem().Type())) |
| if ip != nil { |
| t.Errorf("got non-nil (%d), want nil", *ip) |
| } |
| } |
| |
| func TestMapSetNil(t *testing.T) { |
| m := make(map[string]int) |
| vm := ValueOf(&m) |
| vm.Elem().Set(Zero(vm.Elem().Type())) |
| if m != nil { |
| t.Errorf("got non-nil (%p), want nil", m) |
| } |
| } |
| |
| func TestAll(t *testing.T) { |
| testType(t, 1, TypeOf((int8)(0)), "int8") |
| testType(t, 2, TypeOf((*int8)(nil)).Elem(), "int8") |
| |
| typ := TypeOf((*struct { |
| c chan *int32 |
| d float32 |
| })(nil)) |
| testType(t, 3, typ, "*struct { c chan *int32; d float32 }") |
| etyp := typ.Elem() |
| testType(t, 4, etyp, "struct { c chan *int32; d float32 }") |
| styp := etyp |
| f := styp.Field(0) |
| testType(t, 5, f.Type, "chan *int32") |
| |
| f, present := styp.FieldByName("d") |
| if !present { |
| t.Errorf("FieldByName says present field is absent") |
| } |
| testType(t, 6, f.Type, "float32") |
| |
| f, present = styp.FieldByName("absent") |
| if present { |
| t.Errorf("FieldByName says absent field is present") |
| } |
| |
| typ = TypeOf([32]int32{}) |
| testType(t, 7, typ, "[32]int32") |
| testType(t, 8, typ.Elem(), "int32") |
| |
| typ = TypeOf((map[string]*int32)(nil)) |
| testType(t, 9, typ, "map[string]*int32") |
| mtyp := typ |
| testType(t, 10, mtyp.Key(), "string") |
| testType(t, 11, mtyp.Elem(), "*int32") |
| |
| typ = TypeOf((chan<- string)(nil)) |
| testType(t, 12, typ, "chan<- string") |
| testType(t, 13, typ.Elem(), "string") |
| |
| // make sure tag strings are not part of element type |
| typ = TypeOf(struct { |
| d []uint32 `reflect:"TAG"` |
| }{}).Field(0).Type |
| testType(t, 14, typ, "[]uint32") |
| } |
| |
| func TestInterfaceGet(t *testing.T) { |
| var inter struct { |
| E interface{} |
| } |
| inter.E = 123.456 |
| v1 := ValueOf(&inter) |
| v2 := v1.Elem().Field(0) |
| assert(t, v2.Type().String(), "interface {}") |
| i2 := v2.Interface() |
| v3 := ValueOf(i2) |
| assert(t, v3.Type().String(), "float64") |
| } |
| |
| func TestInterfaceValue(t *testing.T) { |
| var inter struct { |
| E interface{} |
| } |
| inter.E = 123.456 |
| v1 := ValueOf(&inter) |
| v2 := v1.Elem().Field(0) |
| assert(t, v2.Type().String(), "interface {}") |
| v3 := v2.Elem() |
| assert(t, v3.Type().String(), "float64") |
| |
| i3 := v2.Interface() |
| if _, ok := i3.(float64); !ok { |
| t.Error("v2.Interface() did not return float64, got ", TypeOf(i3)) |
| } |
| } |
| |
| func TestFunctionValue(t *testing.T) { |
| var x interface{} = func() {} |
| v := ValueOf(x) |
| if fmt.Sprint(v.Interface()) != fmt.Sprint(x) { |
| t.Fatalf("TestFunction returned wrong pointer") |
| } |
| assert(t, v.Type().String(), "func()") |
| } |
| |
| var appendTests = []struct { |
| orig, extra []int |
| }{ |
| {make([]int, 2, 4), []int{22}}, |
| {make([]int, 2, 4), []int{22, 33, 44}}, |
| } |
| |
| func sameInts(x, y []int) bool { |
| if len(x) != len(y) { |
| return false |
| } |
| for i, xx := range x { |
| if xx != y[i] { |
| return false |
| } |
| } |
| return true |
| } |
| |
| func TestAppend(t *testing.T) { |
| for i, test := range appendTests { |
| origLen, extraLen := len(test.orig), len(test.extra) |
| want := append(test.orig, test.extra...) |
| // Convert extra from []int to []Value. |
| e0 := make([]Value, len(test.extra)) |
| for j, e := range test.extra { |
| e0[j] = ValueOf(e) |
| } |
| // Convert extra from []int to *SliceValue. |
| e1 := ValueOf(test.extra) |
| // Test Append. |
| a0 := ValueOf(test.orig) |
| have0 := Append(a0, e0...).Interface().([]int) |
| if !sameInts(have0, want) { |
| t.Errorf("Append #%d: have %v, want %v (%p %p)", i, have0, want, test.orig, have0) |
| } |
| // Check that the orig and extra slices were not modified. |
| if len(test.orig) != origLen { |
| t.Errorf("Append #%d origLen: have %v, want %v", i, len(test.orig), origLen) |
| } |
| if len(test.extra) != extraLen { |
| t.Errorf("Append #%d extraLen: have %v, want %v", i, len(test.extra), extraLen) |
| } |
| // Test AppendSlice. |
| a1 := ValueOf(test.orig) |
| have1 := AppendSlice(a1, e1).Interface().([]int) |
| if !sameInts(have1, want) { |
| t.Errorf("AppendSlice #%d: have %v, want %v", i, have1, want) |
| } |
| // Check that the orig and extra slices were not modified. |
| if len(test.orig) != origLen { |
| t.Errorf("AppendSlice #%d origLen: have %v, want %v", i, len(test.orig), origLen) |
| } |
| if len(test.extra) != extraLen { |
| t.Errorf("AppendSlice #%d extraLen: have %v, want %v", i, len(test.extra), extraLen) |
| } |
| } |
| } |
| |
| func TestCopy(t *testing.T) { |
| a := []int{1, 2, 3, 4, 10, 9, 8, 7} |
| b := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} |
| c := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} |
| for i := 0; i < len(b); i++ { |
| if b[i] != c[i] { |
| t.Fatalf("b != c before test") |
| } |
| } |
| a1 := a |
| b1 := b |
| aa := ValueOf(&a1).Elem() |
| ab := ValueOf(&b1).Elem() |
| for tocopy := 1; tocopy <= 7; tocopy++ { |
| aa.SetLen(tocopy) |
| Copy(ab, aa) |
| aa.SetLen(8) |
| for i := 0; i < tocopy; i++ { |
| if a[i] != b[i] { |
| t.Errorf("(i) tocopy=%d a[%d]=%d, b[%d]=%d", |
| tocopy, i, a[i], i, b[i]) |
| } |
| } |
| for i := tocopy; i < len(b); i++ { |
| if b[i] != c[i] { |
| if i < len(a) { |
| t.Errorf("(ii) tocopy=%d a[%d]=%d, b[%d]=%d, c[%d]=%d", |
| tocopy, i, a[i], i, b[i], i, c[i]) |
| } else { |
| t.Errorf("(iii) tocopy=%d b[%d]=%d, c[%d]=%d", |
| tocopy, i, b[i], i, c[i]) |
| } |
| } else { |
| t.Logf("tocopy=%d elem %d is okay\n", tocopy, i) |
| } |
| } |
| } |
| } |
| |
| func TestCopyArray(t *testing.T) { |
| a := [8]int{1, 2, 3, 4, 10, 9, 8, 7} |
| b := [11]int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} |
| c := b |
| aa := ValueOf(&a).Elem() |
| ab := ValueOf(&b).Elem() |
| Copy(ab, aa) |
| for i := 0; i < len(a); i++ { |
| if a[i] != b[i] { |
| t.Errorf("(i) a[%d]=%d, b[%d]=%d", i, a[i], i, b[i]) |
| } |
| } |
| for i := len(a); i < len(b); i++ { |
| if b[i] != c[i] { |
| t.Errorf("(ii) b[%d]=%d, c[%d]=%d", i, b[i], i, c[i]) |
| } else { |
| t.Logf("elem %d is okay\n", i) |
| } |
| } |
| } |
| |
| func TestBigUnnamedStruct(t *testing.T) { |
| b := struct{ a, b, c, d int64 }{1, 2, 3, 4} |
| v := ValueOf(b) |
| b1 := v.Interface().(struct { |
| a, b, c, d int64 |
| }) |
| if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d { |
| t.Errorf("ValueOf(%v).Interface().(*Big) = %v", b, b1) |
| } |
| } |
| |
| type big struct { |
| a, b, c, d, e int64 |
| } |
| |
| func TestBigStruct(t *testing.T) { |
| b := big{1, 2, 3, 4, 5} |
| v := ValueOf(b) |
| b1 := v.Interface().(big) |
| if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d || b1.e != b.e { |
| t.Errorf("ValueOf(%v).Interface().(big) = %v", b, b1) |
| } |
| } |
| |
| type Basic struct { |
| x int |
| y float32 |
| } |
| |
| type NotBasic Basic |
| |
| type DeepEqualTest struct { |
| a, b interface{} |
| eq bool |
| } |
| |
| // Simple functions for DeepEqual tests. |
| var ( |
| fn1 func() // nil. |
| fn2 func() // nil. |
| fn3 = func() { fn1() } // Not nil. |
| ) |
| |
| var deepEqualTests = []DeepEqualTest{ |
| // Equalities |
| {nil, nil, true}, |
| {1, 1, true}, |
| {int32(1), int32(1), true}, |
| {0.5, 0.5, true}, |
| {float32(0.5), float32(0.5), true}, |
| {"hello", "hello", true}, |
| {make([]int, 10), make([]int, 10), true}, |
| {&[3]int{1, 2, 3}, &[3]int{1, 2, 3}, true}, |
| {Basic{1, 0.5}, Basic{1, 0.5}, true}, |
| {error(nil), error(nil), true}, |
| {map[int]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, true}, |
| {fn1, fn2, true}, |
| |
| // Inequalities |
| {1, 2, false}, |
| {int32(1), int32(2), false}, |
| {0.5, 0.6, false}, |
| {float32(0.5), float32(0.6), false}, |
| {"hello", "hey", false}, |
| {make([]int, 10), make([]int, 11), false}, |
| {&[3]int{1, 2, 3}, &[3]int{1, 2, 4}, false}, |
| {Basic{1, 0.5}, Basic{1, 0.6}, false}, |
| {Basic{1, 0}, Basic{2, 0}, false}, |
| {map[int]string{1: "one", 3: "two"}, map[int]string{2: "two", 1: "one"}, false}, |
| {map[int]string{1: "one", 2: "txo"}, map[int]string{2: "two", 1: "one"}, false}, |
| {map[int]string{1: "one"}, map[int]string{2: "two", 1: "one"}, false}, |
| {map[int]string{2: "two", 1: "one"}, map[int]string{1: "one"}, false}, |
| {nil, 1, false}, |
| {1, nil, false}, |
| {fn1, fn3, false}, |
| {fn3, fn3, false}, |
| {[][]int{{1}}, [][]int{{2}}, false}, |
| |
| // Nil vs empty: not the same. |
| {[]int{}, []int(nil), false}, |
| {[]int{}, []int{}, true}, |
| {[]int(nil), []int(nil), true}, |
| {map[int]int{}, map[int]int(nil), false}, |
| {map[int]int{}, map[int]int{}, true}, |
| {map[int]int(nil), map[int]int(nil), true}, |
| |
| // Mismatched types |
| {1, 1.0, false}, |
| {int32(1), int64(1), false}, |
| {0.5, "hello", false}, |
| {[]int{1, 2, 3}, [3]int{1, 2, 3}, false}, |
| {&[3]interface{}{1, 2, 4}, &[3]interface{}{1, 2, "s"}, false}, |
| {Basic{1, 0.5}, NotBasic{1, 0.5}, false}, |
| {map[uint]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, false}, |
| } |
| |
| func TestDeepEqual(t *testing.T) { |
| for _, test := range deepEqualTests { |
| if r := DeepEqual(test.a, test.b); r != test.eq { |
| t.Errorf("DeepEqual(%v, %v) = %v, want %v", test.a, test.b, r, test.eq) |
| } |
| } |
| } |
| |
| func TestTypeOf(t *testing.T) { |
| // Special case for nil |
| if typ := TypeOf(nil); typ != nil { |
| t.Errorf("expected nil type for nil value; got %v", typ) |
| } |
| for _, test := range deepEqualTests { |
| v := ValueOf(test.a) |
| if !v.IsValid() { |
| continue |
| } |
| typ := TypeOf(test.a) |
| if typ != v.Type() { |
| t.Errorf("TypeOf(%v) = %v, but ValueOf(%v).Type() = %v", test.a, typ, test.a, v.Type()) |
| } |
| } |
| } |
| |
| type Recursive struct { |
| x int |
| r *Recursive |
| } |
| |
| func TestDeepEqualRecursiveStruct(t *testing.T) { |
| a, b := new(Recursive), new(Recursive) |
| *a = Recursive{12, a} |
| *b = Recursive{12, b} |
| if !DeepEqual(a, b) { |
| t.Error("DeepEqual(recursive same) = false, want true") |
| } |
| } |
| |
| type _Complex struct { |
| a int |
| b [3]*_Complex |
| c *string |
| d map[float64]float64 |
| } |
| |
| func TestDeepEqualComplexStruct(t *testing.T) { |
| m := make(map[float64]float64) |
| stra, strb := "hello", "hello" |
| a, b := new(_Complex), new(_Complex) |
| *a = _Complex{5, [3]*_Complex{a, b, a}, &stra, m} |
| *b = _Complex{5, [3]*_Complex{b, a, a}, &strb, m} |
| if !DeepEqual(a, b) { |
| t.Error("DeepEqual(complex same) = false, want true") |
| } |
| } |
| |
| func TestDeepEqualComplexStructInequality(t *testing.T) { |
| m := make(map[float64]float64) |
| stra, strb := "hello", "helloo" // Difference is here |
| a, b := new(_Complex), new(_Complex) |
| *a = _Complex{5, [3]*_Complex{a, b, a}, &stra, m} |
| *b = _Complex{5, [3]*_Complex{b, a, a}, &strb, m} |
| if DeepEqual(a, b) { |
| t.Error("DeepEqual(complex different) = true, want false") |
| } |
| } |
| |
| type UnexpT struct { |
| m map[int]int |
| } |
| |
| func TestDeepEqualUnexportedMap(t *testing.T) { |
| // Check that DeepEqual can look at unexported fields. |
| x1 := UnexpT{map[int]int{1: 2}} |
| x2 := UnexpT{map[int]int{1: 2}} |
| if !DeepEqual(&x1, &x2) { |
| t.Error("DeepEqual(x1, x2) = false, want true") |
| } |
| |
| y1 := UnexpT{map[int]int{2: 3}} |
| if DeepEqual(&x1, &y1) { |
| t.Error("DeepEqual(x1, y1) = true, want false") |
| } |
| } |
| |
| func check2ndField(x interface{}, offs uintptr, t *testing.T) { |
| s := ValueOf(x) |
| f := s.Type().Field(1) |
| if f.Offset != offs { |
| t.Error("mismatched offsets in structure alignment:", f.Offset, offs) |
| } |
| } |
| |
| // Check that structure alignment & offsets viewed through reflect agree with those |
| // from the compiler itself. |
| func TestAlignment(t *testing.T) { |
| type T1inner struct { |
| a int |
| } |
| type T1 struct { |
| T1inner |
| f int |
| } |
| type T2inner struct { |
| a, b int |
| } |
| type T2 struct { |
| T2inner |
| f int |
| } |
| |
| x := T1{T1inner{2}, 17} |
| check2ndField(x, uintptr(unsafe.Pointer(&x.f))-uintptr(unsafe.Pointer(&x)), t) |
| |
| x1 := T2{T2inner{2, 3}, 17} |
| check2ndField(x1, uintptr(unsafe.Pointer(&x1.f))-uintptr(unsafe.Pointer(&x1)), t) |
| } |
| |
| func Nil(a interface{}, t *testing.T) { |
| n := ValueOf(a).Field(0) |
| if !n.IsNil() { |
| t.Errorf("%v should be nil", a) |
| } |
| } |
| |
| func NotNil(a interface{}, t *testing.T) { |
| n := ValueOf(a).Field(0) |
| if n.IsNil() { |
| t.Errorf("value of type %v should not be nil", ValueOf(a).Type().String()) |
| } |
| } |
| |
| func TestIsNil(t *testing.T) { |
| // These implement IsNil. |
| // Wrap in extra struct to hide interface type. |
| doNil := []interface{}{ |
| struct{ x *int }{}, |
| struct{ x interface{} }{}, |
| struct{ x map[string]int }{}, |
| struct{ x func() bool }{}, |
| struct{ x chan int }{}, |
| struct{ x []string }{}, |
| } |
| for _, ts := range doNil { |
| ty := TypeOf(ts).Field(0).Type |
| v := Zero(ty) |
| v.IsNil() // panics if not okay to call |
| } |
| |
| // Check the implementations |
| var pi struct { |
| x *int |
| } |
| Nil(pi, t) |
| pi.x = new(int) |
| NotNil(pi, t) |
| |
| var si struct { |
| x []int |
| } |
| Nil(si, t) |
| si.x = make([]int, 10) |
| NotNil(si, t) |
| |
| var ci struct { |
| x chan int |
| } |
| Nil(ci, t) |
| ci.x = make(chan int) |
| NotNil(ci, t) |
| |
| var mi struct { |
| x map[int]int |
| } |
| Nil(mi, t) |
| mi.x = make(map[int]int) |
| NotNil(mi, t) |
| |
| var ii struct { |
| x interface{} |
| } |
| Nil(ii, t) |
| ii.x = 2 |
| NotNil(ii, t) |
| |
| var fi struct { |
| x func(t *testing.T) |
| } |
| Nil(fi, t) |
| fi.x = TestIsNil |
| NotNil(fi, t) |
| } |
| |
| func TestInterfaceExtraction(t *testing.T) { |
| var s struct { |
| W io.Writer |
| } |
| |
| s.W = os.Stdout |
| v := Indirect(ValueOf(&s)).Field(0).Interface() |
| if v != s.W.(interface{}) { |
| t.Error("Interface() on interface: ", v, s.W) |
| } |
| } |
| |
| func TestNilPtrValueSub(t *testing.T) { |
| var pi *int |
| if pv := ValueOf(pi); pv.Elem().IsValid() { |
| t.Error("ValueOf((*int)(nil)).Elem().IsValid()") |
| } |
| } |
| |
| func TestMap(t *testing.T) { |
| m := map[string]int{"a": 1, "b": 2} |
| mv := ValueOf(m) |
| if n := mv.Len(); n != len(m) { |
| t.Errorf("Len = %d, want %d", n, len(m)) |
| } |
| keys := mv.MapKeys() |
| newmap := MakeMap(mv.Type()) |
| for k, v := range m { |
| // Check that returned Keys match keys in range. |
| // These aren't required to be in the same order. |
| seen := false |
| for _, kv := range keys { |
| if kv.String() == k { |
| seen = true |
| break |
| } |
| } |
| if !seen { |
| t.Errorf("Missing key %q", k) |
| } |
| |
| // Check that value lookup is correct. |
| vv := mv.MapIndex(ValueOf(k)) |
| if vi := vv.Int(); vi != int64(v) { |
| t.Errorf("Key %q: have value %d, want %d", k, vi, v) |
| } |
| |
| // Copy into new map. |
| newmap.SetMapIndex(ValueOf(k), ValueOf(v)) |
| } |
| vv := mv.MapIndex(ValueOf("not-present")) |
| if vv.IsValid() { |
| t.Errorf("Invalid key: got non-nil value %s", valueToString(vv)) |
| } |
| |
| newm := newmap.Interface().(map[string]int) |
| if len(newm) != len(m) { |
| t.Errorf("length after copy: newm=%d, m=%d", len(newm), len(m)) |
| } |
| |
| for k, v := range newm { |
| mv, ok := m[k] |
| if mv != v { |
| t.Errorf("newm[%q] = %d, but m[%q] = %d, %v", k, v, k, mv, ok) |
| } |
| } |
| |
| newmap.SetMapIndex(ValueOf("a"), Value{}) |
| v, ok := newm["a"] |
| if ok { |
| t.Errorf("newm[\"a\"] = %d after delete", v) |
| } |
| |
| mv = ValueOf(&m).Elem() |
| mv.Set(Zero(mv.Type())) |
| if m != nil { |
| t.Errorf("mv.Set(nil) failed") |
| } |
| } |
| |
| func TestNilMap(t *testing.T) { |
| var m map[string]int |
| mv := ValueOf(m) |
| keys := mv.MapKeys() |
| if len(keys) != 0 { |
| t.Errorf(">0 keys for nil map: %v", keys) |
| } |
| |
| // Check that value for missing key is zero. |
| x := mv.MapIndex(ValueOf("hello")) |
| if x.Kind() != Invalid { |
| t.Errorf("m.MapIndex(\"hello\") for nil map = %v, want Invalid Value", x) |
| } |
| |
| // Check big value too. |
| var mbig map[string][10 << 20]byte |
| x = ValueOf(mbig).MapIndex(ValueOf("hello")) |
| if x.Kind() != Invalid { |
| t.Errorf("mbig.MapIndex(\"hello\") for nil map = %v, want Invalid Value", x) |
| } |
| |
| // Test that deletes from a nil map succeed. |
| mv.SetMapIndex(ValueOf("hi"), Value{}) |
| } |
| |
| func TestChan(t *testing.T) { |
| for loop := 0; loop < 2; loop++ { |
| var c chan int |
| var cv Value |
| |
| // check both ways to allocate channels |
| switch loop { |
| case 1: |
| c = make(chan int, 1) |
| cv = ValueOf(c) |
| case 0: |
| cv = MakeChan(TypeOf(c), 1) |
| c = cv.Interface().(chan int) |
| } |
| |
| // Send |
| cv.Send(ValueOf(2)) |
| if i := <-c; i != 2 { |
| t.Errorf("reflect Send 2, native recv %d", i) |
| } |
| |
| // Recv |
| c <- 3 |
| if i, ok := cv.Recv(); i.Int() != 3 || !ok { |
| t.Errorf("native send 3, reflect Recv %d, %t", i.Int(), ok) |
| } |
| |
| // TryRecv fail |
| val, ok := cv.TryRecv() |
| if val.IsValid() || ok { |
| t.Errorf("TryRecv on empty chan: %s, %t", valueToString(val), ok) |
| } |
| |
| // TryRecv success |
| c <- 4 |
| val, ok = cv.TryRecv() |
| if !val.IsValid() { |
| t.Errorf("TryRecv on ready chan got nil") |
| } else if i := val.Int(); i != 4 || !ok { |
| t.Errorf("native send 4, TryRecv %d, %t", i, ok) |
| } |
| |
| // TrySend fail |
| c <- 100 |
| ok = cv.TrySend(ValueOf(5)) |
| i := <-c |
| if ok { |
| t.Errorf("TrySend on full chan succeeded: value %d", i) |
| } |
| |
| // TrySend success |
| ok = cv.TrySend(ValueOf(6)) |
| if !ok { |
| t.Errorf("TrySend on empty chan failed") |
| select { |
| case x := <-c: |
| t.Errorf("TrySend failed but it did send %d", x) |
| default: |
| } |
| } else { |
| if i = <-c; i != 6 { |
| t.Errorf("TrySend 6, recv %d", i) |
| } |
| } |
| |
| // Close |
| c <- 123 |
| cv.Close() |
| if i, ok := cv.Recv(); i.Int() != 123 || !ok { |
| t.Errorf("send 123 then close; Recv %d, %t", i.Int(), ok) |
| } |
| if i, ok := cv.Recv(); i.Int() != 0 || ok { |
| t.Errorf("after close Recv %d, %t", i.Int(), ok) |
| } |
| } |
| |
| // check creation of unbuffered channel |
| var c chan int |
| cv := MakeChan(TypeOf(c), 0) |
| c = cv.Interface().(chan int) |
| if cv.TrySend(ValueOf(7)) { |
| t.Errorf("TrySend on sync chan succeeded") |
| } |
| if v, ok := cv.TryRecv(); v.IsValid() || ok { |
| t.Errorf("TryRecv on sync chan succeeded: isvalid=%v ok=%v", v.IsValid(), ok) |
| } |
| |
| // len/cap |
| cv = MakeChan(TypeOf(c), 10) |
| c = cv.Interface().(chan int) |
| for i := 0; i < 3; i++ { |
| c <- i |
| } |
| if l, m := cv.Len(), cv.Cap(); l != len(c) || m != cap(c) { |
| t.Errorf("Len/Cap = %d/%d want %d/%d", l, m, len(c), cap(c)) |
| } |
| } |
| |
| // caseInfo describes a single case in a select test. |
| type caseInfo struct { |
| desc string |
| canSelect bool |
| recv Value |
| closed bool |
| helper func() |
| panic bool |
| } |
| |
| var allselect = flag.Bool("allselect", false, "exhaustive select test") |
| |
| func TestSelect(t *testing.T) { |
| selectWatch.once.Do(func() { go selectWatcher() }) |
| |
| var x exhaustive |
| nch := 0 |
| newop := func(n int, cap int) (ch, val Value) { |
| nch++ |
| if nch%101%2 == 1 { |
| c := make(chan int, cap) |
| ch = ValueOf(c) |
| val = ValueOf(n) |
| } else { |
| c := make(chan string, cap) |
| ch = ValueOf(c) |
| val = ValueOf(fmt.Sprint(n)) |
| } |
| return |
| } |
| |
| for n := 0; x.Next(); n++ { |
| if testing.Short() && n >= 1000 { |
| break |
| } |
| if n >= 100000 && !*allselect { |
| break |
| } |
| if n%100000 == 0 && testing.Verbose() { |
| println("TestSelect", n) |
| } |
| var cases []SelectCase |
| var info []caseInfo |
| |
| // Ready send. |
| if x.Maybe() { |
| ch, val := newop(len(cases), 1) |
| cases = append(cases, SelectCase{ |
| Dir: SelectSend, |
| Chan: ch, |
| Send: val, |
| }) |
| info = append(info, caseInfo{desc: "ready send", canSelect: true}) |
| } |
| |
| // Ready recv. |
| if x.Maybe() { |
| ch, val := newop(len(cases), 1) |
| ch.Send(val) |
| cases = append(cases, SelectCase{ |
| Dir: SelectRecv, |
| Chan: ch, |
| }) |
| info = append(info, caseInfo{desc: "ready recv", canSelect: true, recv: val}) |
| } |
| |
| // Blocking send. |
| if x.Maybe() { |
| ch, val := newop(len(cases), 0) |
| cases = append(cases, SelectCase{ |
| Dir: SelectSend, |
| Chan: ch, |
| Send: val, |
| }) |
| // Let it execute? |
| if x.Maybe() { |
| f := func() { ch.Recv() } |
| info = append(info, caseInfo{desc: "blocking send", helper: f}) |
| } else { |
| info = append(info, caseInfo{desc: "blocking send"}) |
| } |
| } |
| |
| // Blocking recv. |
| if x.Maybe() { |
| ch, val := newop(len(cases), 0) |
| cases = append(cases, SelectCase{ |
| Dir: SelectRecv, |
| Chan: ch, |
| }) |
| // Let it execute? |
| if x.Maybe() { |
| f := func() { ch.Send(val) } |
| info = append(info, caseInfo{desc: "blocking recv", recv: val, helper: f}) |
| } else { |
| info = append(info, caseInfo{desc: "blocking recv"}) |
| } |
| } |
| |
| // Zero Chan send. |
| if x.Maybe() { |
| // Maybe include value to send. |
| var val Value |
| if x.Maybe() { |
| val = ValueOf(100) |
| } |
| cases = append(cases, SelectCase{ |
| Dir: SelectSend, |
| Send: val, |
| }) |
| info = append(info, caseInfo{desc: "zero Chan send"}) |
| } |
| |
| // Zero Chan receive. |
| if x.Maybe() { |
| cases = append(cases, SelectCase{ |
| Dir: SelectRecv, |
| }) |
| info = append(info, caseInfo{desc: "zero Chan recv"}) |
| } |
| |
| // nil Chan send. |
| if x.Maybe() { |
| cases = append(cases, SelectCase{ |
| Dir: SelectSend, |
| Chan: ValueOf((chan int)(nil)), |
| Send: ValueOf(101), |
| }) |
| info = append(info, caseInfo{desc: "nil Chan send"}) |
| } |
| |
| // nil Chan recv. |
| if x.Maybe() { |
| cases = append(cases, SelectCase{ |
| Dir: SelectRecv, |
| Chan: ValueOf((chan int)(nil)), |
| }) |
| info = append(info, caseInfo{desc: "nil Chan recv"}) |
| } |
| |
| // closed Chan send. |
| if x.Maybe() { |
| ch := make(chan int) |
| close(ch) |
| cases = append(cases, SelectCase{ |
| Dir: SelectSend, |
| Chan: ValueOf(ch), |
| Send: ValueOf(101), |
| }) |
| info = append(info, caseInfo{desc: "closed Chan send", canSelect: true, panic: true}) |
| } |
| |
| // closed Chan recv. |
| if x.Maybe() { |
| ch, val := newop(len(cases), 0) |
| ch.Close() |
| val = Zero(val.Type()) |
| cases = append(cases, SelectCase{ |
| Dir: SelectRecv, |
| Chan: ch, |
| }) |
| info = append(info, caseInfo{desc: "closed Chan recv", canSelect: true, closed: true, recv: val}) |
| } |
| |
| var helper func() // goroutine to help the select complete |
| |
| // Add default? Must be last case here, but will permute. |
| // Add the default if the select would otherwise |
| // block forever, and maybe add it anyway. |
| numCanSelect := 0 |
| canProceed := false |
| canBlock := true |
| canPanic := false |
| helpers := []int{} |
| for i, c := range info { |
| if c.canSelect { |
| canProceed = true |
| canBlock = false |
| numCanSelect++ |
| if c.panic { |
| canPanic = true |
| } |
| } else if c.helper != nil { |
| canProceed = true |
| helpers = append(helpers, i) |
| } |
| } |
| if !canProceed || x.Maybe() { |
| cases = append(cases, SelectCase{ |
| Dir: SelectDefault, |
| }) |
| info = append(info, caseInfo{desc: "default", canSelect: canBlock}) |
| numCanSelect++ |
| } else if canBlock { |
| // Select needs to communicate with another goroutine. |
| cas := &info[helpers[x.Choose(len(helpers))]] |
| helper = cas.helper |
| cas.canSelect = true |
| numCanSelect++ |
| } |
| |
| // Permute cases and case info. |
| // Doing too much here makes the exhaustive loop |
| // too exhausting, so just do two swaps. |
| for loop := 0; loop < 2; loop++ { |
| i := x.Choose(len(cases)) |
| j := x.Choose(len(cases)) |
| cases[i], cases[j] = cases[j], cases[i] |
| info[i], info[j] = info[j], info[i] |
| } |
| |
| if helper != nil { |
| // We wait before kicking off a goroutine to satisfy a blocked select. |
| // The pause needs to be big enough to let the select block before |
| // we run the helper, but if we lose that race once in a while it's okay: the |
| // select will just proceed immediately. Not a big deal. |
| // For short tests we can grow [sic] the timeout a bit without fear of taking too long |
| pause := 10 * time.Microsecond |
| if testing.Short() { |
| pause = 100 * time.Microsecond |
| } |
| time.AfterFunc(pause, helper) |
| } |
| |
| // Run select. |
| i, recv, recvOK, panicErr := runSelect(cases, info) |
| if panicErr != nil && !canPanic { |
| t.Fatalf("%s\npanicked unexpectedly: %v", fmtSelect(info), panicErr) |
| } |
| if panicErr == nil && canPanic && numCanSelect == 1 { |
| t.Fatalf("%s\nselected #%d incorrectly (should panic)", fmtSelect(info), i) |
| } |
| if panicErr != nil { |
| continue |
| } |
| |
| cas := info[i] |
| if !cas.canSelect { |
| recvStr := "" |
| if recv.IsValid() { |
| recvStr = fmt.Sprintf(", received %v, %v", recv.Interface(), recvOK) |
| } |
| t.Fatalf("%s\nselected #%d incorrectly%s", fmtSelect(info), i, recvStr) |
| continue |
| } |
| if cas.panic { |
| t.Fatalf("%s\nselected #%d incorrectly (case should panic)", fmtSelect(info), i) |
| continue |
| } |
| |
| if cases[i].Dir == SelectRecv { |
| if !recv.IsValid() { |
| t.Fatalf("%s\nselected #%d but got %v, %v, want %v, %v", fmtSelect(info), i, recv, recvOK, cas.recv.Interface(), !cas.closed) |
| } |
| if !cas.recv.IsValid() { |
| t.Fatalf("%s\nselected #%d but internal error: missing recv value", fmtSelect(info), i) |
| } |
| if recv.Interface() != cas.recv.Interface() || recvOK != !cas.closed { |
| if recv.Interface() == cas.recv.Interface() && recvOK == !cas.closed { |
| t.Fatalf("%s\nselected #%d, got %#v, %v, and DeepEqual is broken on %T", fmtSelect(info), i, recv.Interface(), recvOK, recv.Interface()) |
| } |
| t.Fatalf("%s\nselected #%d but got %#v, %v, want %#v, %v", fmtSelect(info), i, recv.Interface(), recvOK, cas.recv.Interface(), !cas.closed) |
| } |
| } else { |
| if recv.IsValid() || recvOK { |
| t.Fatalf("%s\nselected #%d but got %v, %v, want %v, %v", fmtSelect(info), i, recv, recvOK, Value{}, false) |
| } |
| } |
| } |
| } |
| |
| // selectWatch and the selectWatcher are a watchdog mechanism for running Select. |
| // If the selectWatcher notices that the select has been blocked for >1 second, it prints |
| // an error describing the select and panics the entire test binary. |
| var selectWatch struct { |
| sync.Mutex |
| once sync.Once |
| now time.Time |
| info []caseInfo |
| } |
| |
| func selectWatcher() { |
| for { |
| time.Sleep(1 * time.Second) |
| selectWatch.Lock() |
| if selectWatch.info != nil && time.Since(selectWatch.now) > 1*time.Second { |
| fmt.Fprintf(os.Stderr, "TestSelect:\n%s blocked indefinitely\n", fmtSelect(selectWatch.info)) |
| panic("select stuck") |
| } |
| selectWatch.Unlock() |
| } |
| } |
| |
| // runSelect runs a single select test. |
| // It returns the values returned by Select but also returns |
| // a panic value if the Select panics. |
| func runSelect(cases []SelectCase, info []caseInfo) (chosen int, recv Value, recvOK bool, panicErr interface{}) { |
| defer func() { |
| panicErr = recover() |
| |
| selectWatch.Lock() |
| selectWatch.info = nil |
| selectWatch.Unlock() |
| }() |
| |
| selectWatch.Lock() |
| selectWatch.now = time.Now() |
| selectWatch.info = info |
| selectWatch.Unlock() |
| |
| chosen, recv, recvOK = Select(cases) |
| return |
| } |
| |
| // fmtSelect formats the information about a single select test. |
| func fmtSelect(info []caseInfo) string { |
| var buf bytes.Buffer |
| fmt.Fprintf(&buf, "\nselect {\n") |
| for i, cas := range info { |
| fmt.Fprintf(&buf, "%d: %s", i, cas.desc) |
| if cas.recv.IsValid() { |
| fmt.Fprintf(&buf, " val=%#v", cas.recv.Interface()) |
| } |
| if cas.canSelect { |
| fmt.Fprintf(&buf, " canselect") |
| } |
| if cas.panic { |
| fmt.Fprintf(&buf, " panic") |
| } |
| fmt.Fprintf(&buf, "\n") |
| } |
| fmt.Fprintf(&buf, "}") |
| return buf.String() |
| } |
| |
| type two [2]uintptr |
| |
| // Difficult test for function call because of |
| // implicit padding between arguments. |
| func dummy(b byte, c int, d byte, e two, f byte, g float32, h byte) (i byte, j int, k byte, l two, m byte, n float32, o byte) { |
| return b, c, d, e, f, g, h |
| } |
| |
| func TestFunc(t *testing.T) { |
| ret := ValueOf(dummy).Call([]Value{ |
| ValueOf(byte(10)), |
| ValueOf(20), |
| ValueOf(byte(30)), |
| ValueOf(two{40, 50}), |
| ValueOf(byte(60)), |
| ValueOf(float32(70)), |
| ValueOf(byte(80)), |
| }) |
| if len(ret) != 7 { |
| t.Fatalf("Call returned %d values, want 7", len(ret)) |
| } |
| |
| i := byte(ret[0].Uint()) |
| j := int(ret[1].Int()) |
| k := byte(ret[2].Uint()) |
| l := ret[3].Interface().(two) |
| m := byte(ret[4].Uint()) |
| n := float32(ret[5].Float()) |
| o := byte(ret[6].Uint()) |
| |
| if i != 10 || j != 20 || k != 30 || l != (two{40, 50}) || m != 60 || n != 70 || o != 80 { |
| t.Errorf("Call returned %d, %d, %d, %v, %d, %g, %d; want 10, 20, 30, [40, 50], 60, 70, 80", i, j, k, l, m, n, o) |
| } |
| } |
| |
| type emptyStruct struct{} |
| |
| type nonEmptyStruct struct { |
| member int |
| } |
| |
| func returnEmpty() emptyStruct { |
| return emptyStruct{} |
| } |
| |
| func takesEmpty(e emptyStruct) { |
| } |
| |
| func returnNonEmpty(i int) nonEmptyStruct { |
| return nonEmptyStruct{member: i} |
| } |
| |
| func takesNonEmpty(n nonEmptyStruct) int { |
| return n.member |
| } |
| |
| func TestCallWithStruct(t *testing.T) { |
| r := ValueOf(returnEmpty).Call(nil) |
| if len(r) != 1 || r[0].Type() != TypeOf(emptyStruct{}) { |
| t.Errorf("returning empty struct returned %#v instead", r) |
| } |
| r = ValueOf(takesEmpty).Call([]Value{ValueOf(emptyStruct{})}) |
| if len(r) != 0 { |
| t.Errorf("takesEmpty returned values: %#v", r) |
| } |
| r = ValueOf(returnNonEmpty).Call([]Value{ValueOf(42)}) |
| if len(r) != 1 || r[0].Type() != TypeOf(nonEmptyStruct{}) || r[0].Field(0).Int() != 42 { |
| t.Errorf("returnNonEmpty returned %#v", r) |
| } |
| r = ValueOf(takesNonEmpty).Call([]Value{ValueOf(nonEmptyStruct{member: 42})}) |
| if len(r) != 1 || r[0].Type() != TypeOf(1) || r[0].Int() != 42 { |
| t.Errorf("takesNonEmpty returned %#v", r) |
| } |
| } |
| |
| func BenchmarkCall(b *testing.B) { |
| fv := ValueOf(func(a, b string) {}) |
| b.ReportAllocs() |
| b.RunParallel(func(pb *testing.PB) { |
| args := []Value{ValueOf("a"), ValueOf("b")} |
| for pb.Next() { |
| fv.Call(args) |
| } |
| }) |
| } |
| |
| func TestMakeFunc(t *testing.T) { |
| f := dummy |
| fv := MakeFunc(TypeOf(f), func(in []Value) []Value { return in }) |
| ValueOf(&f).Elem().Set(fv) |
| |
| // Call g with small arguments so that there is |
| // something predictable (and different from the |
| // correct results) in those positions on the stack. |
| g := dummy |
| g(1, 2, 3, two{4, 5}, 6, 7, 8) |
| |
| // Call constructed function f. |
| i, j, k, l, m, n, o := f(10, 20, 30, two{40, 50}, 60, 70, 80) |
| if i != 10 || j != 20 || k != 30 || l != (two{40, 50}) || m != 60 || n != 70 || o != 80 { |
| t.Errorf("Call returned %d, %d, %d, %v, %d, %g, %d; want 10, 20, 30, [40, 50], 60, 70, 80", i, j, k, l, m, n, o) |
| } |
| } |
| |
| func TestMakeFuncInterface(t *testing.T) { |
| fn := func(i int) int { return i } |
| incr := func(in []Value) []Value { |
| return []Value{ValueOf(int(in[0].Int() + 1))} |
| } |
| fv := MakeFunc(TypeOf(fn), incr) |
| ValueOf(&fn).Elem().Set(fv) |
| if r := fn(2); r != 3 { |
| t.Errorf("Call returned %d, want 3", r) |
| } |
| if r := fv.Call([]Value{ValueOf(14)})[0].Int(); r != 15 { |
| t.Errorf("Call returned %d, want 15", r) |
| } |
| if r := fv.Interface().(func(int) int)(26); r != 27 { |
| t.Errorf("Call returned %d, want 27", r) |
| } |
| } |
| |
| func TestMakeFuncVariadic(t *testing.T) { |
| // Test that variadic arguments are packed into a slice and passed as last arg |
| fn := func(_ int, is ...int) []int { return nil } |
| fv := MakeFunc(TypeOf(fn), func(in []Value) []Value { return in[1:2] }) |
| ValueOf(&fn).Elem().Set(fv) |
| |
| r := fn(1, 2, 3) |
| if r[0] != 2 || r[1] != 3 { |
| t.Errorf("Call returned [%v, %v]; want 2, 3", r[0], r[1]) |
| } |
| |
| r = fn(1, []int{2, 3}...) |
| if r[0] != 2 || r[1] != 3 { |
| t.Errorf("Call returned [%v, %v]; want 2, 3", r[0], r[1]) |
| } |
| |
| r = fv.Call([]Value{ValueOf(1), ValueOf(2), ValueOf(3)})[0].Interface().([]int) |
| if r[0] != 2 || r[1] != 3 { |
| t.Errorf("Call returned [%v, %v]; want 2, 3", r[0], r[1]) |
| } |
| |
| r = fv.CallSlice([]Value{ValueOf(1), ValueOf([]int{2, 3})})[0].Interface().([]int) |
| if r[0] != 2 || r[1] != 3 { |
| t.Errorf("Call returned [%v, %v]; want 2, 3", r[0], r[1]) |
| } |
| |
| f := fv.Interface().(func(int, ...int) []int) |
| |
| r = f(1, 2, 3) |
| if r[0] != 2 || r[1] != 3 { |
| t.Errorf("Call returned [%v, %v]; want 2, 3", r[0], r[1]) |
| } |
| r = f(1, []int{2, 3}...) |
| if r[0] != 2 || r[1] != 3 { |
| t.Errorf("Call returned [%v, %v]; want 2, 3", r[0], r[1]) |
| } |
| } |
| |
| type Point struct { |
| x, y int |
| } |
| |
| // This will be index 0. |
| func (p Point) AnotherMethod(scale int) int { |
| return -1 |
| } |
| |
| // This will be index 1. |
| func (p Point) Dist(scale int) int { |
| //println("Point.Dist", p.x, p.y, scale) |
| return p.x*p.x*scale + p.y*p.y*scale |
| } |
| |
| // This will be index 2. |
| func (p Point) GCMethod(k int) int { |
| runtime.GC() |
| return k + p.x |
| } |
| |
| // This will be index 3. |
| func (p Point) TotalDist(points ...Point) int { |
| tot := 0 |
| for _, q := range points { |
| dx := q.x - p.x |
| dy := q.y - p.y |
| tot += dx*dx + dy*dy // Should call Sqrt, but it's just a test. |
| |
| } |
| return tot |
| } |
| |
| func TestMethod(t *testing.T) { |
| // Non-curried method of type. |
| p := Point{3, 4} |
| i := TypeOf(p).Method(1).Func.Call([]Value{ValueOf(p), ValueOf(10)})[0].Int() |
| if i != 250 { |
| t.Errorf("Type Method returned %d; want 250", i) |
| } |
| |
| m, ok := TypeOf(p).MethodByName("Dist") |
| if !ok { |
| t.Fatalf("method by name failed") |
| } |
| i = m.Func.Call([]Value{ValueOf(p), ValueOf(11)})[0].Int() |
| if i != 275 { |
| t.Errorf("Type MethodByName returned %d; want 275", i) |
| } |
| |
| i = TypeOf(&p).Method(1).Func.Call([]Value{ValueOf(&p), ValueOf(12)})[0].Int() |
| if i != 300 { |
| t.Errorf("Pointer Type Method returned %d; want 300", i) |
| } |
| |
| m, ok = TypeOf(&p).MethodByName("Dist") |
| if !ok { |
| t.Fatalf("ptr method by name failed") |
| } |
| i = m.Func.Call([]Value{ValueOf(&p), ValueOf(13)})[0].Int() |
| if i != 325 { |
| t.Errorf("Pointer Type MethodByName returned %d; want 325", i) |
| } |
| |
| // Curried method of value. |
| tfunc := TypeOf((func(int) int)(nil)) |
| v := ValueOf(p).Method(1) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Value Method Type is %s; want %s", tt, tfunc) |
| } |
| i = v.Call([]Value{ValueOf(14)})[0].Int() |
| if i != 350 { |
| t.Errorf("Value Method returned %d; want 350", i) |
| } |
| v = ValueOf(p).MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Value MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = v.Call([]Value{ValueOf(15)})[0].Int() |
| if i != 375 { |
| t.Errorf("Value MethodByName returned %d; want 375", i) |
| } |
| |
| // Curried method of pointer. |
| v = ValueOf(&p).Method(1) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Pointer Value Method Type is %s; want %s", tt, tfunc) |
| } |
| i = v.Call([]Value{ValueOf(16)})[0].Int() |
| if i != 400 { |
| t.Errorf("Pointer Value Method returned %d; want 400", i) |
| } |
| v = ValueOf(&p).MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Pointer Value MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = v.Call([]Value{ValueOf(17)})[0].Int() |
| if i != 425 { |
| t.Errorf("Pointer Value MethodByName returned %d; want 425", i) |
| } |
| |
| // Curried method of interface value. |
| // Have to wrap interface value in a struct to get at it. |
| // Passing it to ValueOf directly would |
| // access the underlying Point, not the interface. |
| var x interface { |
| Dist(int) int |
| } = p |
| pv := ValueOf(&x).Elem() |
| v = pv.Method(0) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Interface Method Type is %s; want %s", tt, tfunc) |
| } |
| i = v.Call([]Value{ValueOf(18)})[0].Int() |
| if i != 450 { |
| t.Errorf("Interface Method returned %d; want 450", i) |
| } |
| v = pv.MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Interface MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = v.Call([]Value{ValueOf(19)})[0].Int() |
| if i != 475 { |
| t.Errorf("Interface MethodByName returned %d; want 475", i) |
| } |
| } |
| |
| func TestMethodValue(t *testing.T) { |
| p := Point{3, 4} |
| var i int64 |
| |
| // Curried method of value. |
| tfunc := TypeOf((func(int) int)(nil)) |
| v := ValueOf(p).Method(1) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Value Method Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(10)})[0].Int() |
| if i != 250 { |
| t.Errorf("Value Method returned %d; want 250", i) |
| } |
| v = ValueOf(p).MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Value MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(11)})[0].Int() |
| if i != 275 { |
| t.Errorf("Value MethodByName returned %d; want 275", i) |
| } |
| |
| // Curried method of pointer. |
| v = ValueOf(&p).Method(1) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Pointer Value Method Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(12)})[0].Int() |
| if i != 300 { |
| t.Errorf("Pointer Value Method returned %d; want 300", i) |
| } |
| v = ValueOf(&p).MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Pointer Value MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(13)})[0].Int() |
| if i != 325 { |
| t.Errorf("Pointer Value MethodByName returned %d; want 325", i) |
| } |
| |
| // Curried method of pointer to pointer. |
| pp := &p |
| v = ValueOf(&pp).Elem().Method(1) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Pointer Pointer Value Method Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(14)})[0].Int() |
| if i != 350 { |
| t.Errorf("Pointer Pointer Value Method returned %d; want 350", i) |
| } |
| v = ValueOf(&pp).Elem().MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Pointer Pointer Value MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(15)})[0].Int() |
| if i != 375 { |
| t.Errorf("Pointer Pointer Value MethodByName returned %d; want 375", i) |
| } |
| |
| // Curried method of interface value. |
| // Have to wrap interface value in a struct to get at it. |
| // Passing it to ValueOf directly would |
| // access the underlying Point, not the interface. |
| var s = struct { |
| X interface { |
| Dist(int) int |
| } |
| }{p} |
| pv := ValueOf(s).Field(0) |
| v = pv.Method(0) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Interface Method Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(16)})[0].Int() |
| if i != 400 { |
| t.Errorf("Interface Method returned %d; want 400", i) |
| } |
| v = pv.MethodByName("Dist") |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Interface MethodByName Type is %s; want %s", tt, tfunc) |
| } |
| i = ValueOf(v.Interface()).Call([]Value{ValueOf(17)})[0].Int() |
| if i != 425 { |
| t.Errorf("Interface MethodByName returned %d; want 425", i) |
| } |
| } |
| |
| func TestVariadicMethodValue(t *testing.T) { |
| p := Point{3, 4} |
| points := []Point{{20, 21}, {22, 23}, {24, 25}} |
| want := int64(p.TotalDist(points[0], points[1], points[2])) |
| |
| // Curried method of value. |
| tfunc := TypeOf((func(...Point) int)(nil)) |
| v := ValueOf(p).Method(3) |
| if tt := v.Type(); tt != tfunc { |
| t.Errorf("Variadic Method Type is %s; want %s", tt, tfunc) |
| } |
| i := ValueOf(v.Interface()).Call([]Value{ValueOf(points[0]), ValueOf(points[1]), ValueOf(points[2])})[0].Int() |
| if i != want { |
| t.Errorf("Variadic Method returned %d; want %d", i, want) |
| } |
| i = ValueOf(v.Interface()).CallSlice([]Value{ValueOf(points)})[0].Int() |
| if i != want { |
| t.Errorf("Variadic Method CallSlice returned %d; want %d", i, want) |
| } |
| |
| f := v.Interface().(func(...Point) int) |
| i = int64(f(points[0], points[1], points[2])) |
| if i != want { |
| t.Errorf("Variadic Method Interface returned %d; want %d", i, want) |
| } |
| i = int64(f(points...)) |
| if i != want { |
| t.Errorf("Variadic Method Interface Slice returned %d; want %d", i, want) |
| } |
| } |
| |
| // Reflect version of $GOROOT/test/method5.go |
| |
| // Concrete types implementing M method. |
| // Smaller than a word, word-sized, larger than a word. |
| // Value and pointer receivers. |
| |
| type Tinter interface { |
| M(int, byte) (byte, int) |
| } |
| |
| type Tsmallv byte |
| |
| func (v Tsmallv) M(x int, b byte) (byte, int) { return b, x + int(v) } |
| |
| type Tsmallp byte |
| |
| func (p *Tsmallp) M(x int, b byte) (byte, int) { return b, x + int(*p) } |
| |
| type Twordv uintptr |
| |
| func (v Twordv) M(x int, b byte) (byte, int) { return b, x + int(v) } |
| |
| type Twordp uintptr |
| |
| func (p *Twordp) M(x int, b byte) (byte, int) { return b, x + int(*p) } |
| |
| type Tbigv [2]uintptr |
| |
| func (v Tbigv) M(x int, b byte) (byte, int) { return b, x + int(v[0]) + int(v[1]) } |
| |
| type Tbigp [2]uintptr |
| |
| func (p *Tbigp) M(x int, b byte) (byte, int) { return b, x + int(p[0]) + int(p[1]) } |
| |
| // Again, with an unexported method. |
| |
| type tsmallv byte |
| |
| func (v tsmallv) m(x int, b byte) (byte, int) { return b, x + int(v) } |
| |
| type tsmallp byte |
| |
| func (p *tsmallp) m(x int, b byte) (byte, int) { return b, x + int(*p) } |
| |
| type twordv uintptr |
| |
| func (v twordv) m(x int, b byte) (byte, int) { return b, x + int(v) } |
| |
| type twordp uintptr |
| |
| func (p *twordp) m(x int, b byte) (byte, int) { return b, x + int(*p) } |
| |
| type tbigv [2]uintptr |
| |
| func (v tbigv) m(x int, b byte) (byte, int) { return b, x + int(v[0]) + int(v[1]) } |
| |
| type tbigp [2]uintptr |
| |
| func (p *tbigp) m(x int, b byte) (byte, int) { return b, x + int(p[0]) + int(p[1]) } |
| |
| type tinter interface { |
| m(int, byte) (byte, int) |
| } |
| |
| // Embedding via pointer. |
| |
| type Tm1 struct { |
| Tm2 |
| } |
| |
| type Tm2 struct { |
| *Tm3 |
| } |
| |
| type Tm3 struct { |
| *Tm4 |
| } |
| |
| type Tm4 struct { |
| } |
| |
| func (t4 Tm4) M(x int, b byte) (byte, int) { return b, x + 40 } |
| |
| func TestMethod5(t *testing.T) { |
| CheckF := func(name string, f func(int, byte) (byte, int), inc int) { |
| b, x := f(1000, 99) |
| if b != 99 || x != 1000+inc { |
| t.Errorf("%s(1000, 99) = %v, %v, want 99, %v", name, b, x, 1000+inc) |
| } |
| } |
| |
| CheckV := func(name string, i Value, inc int) { |
| bx := i.Method(0).Call([]Value{ValueOf(1000), ValueOf(byte(99))}) |
| b := bx[0].Interface() |
| x := bx[1].Interface() |
| if b != byte(99) || x != 1000+inc { |
| t.Errorf("direct %s.M(1000, 99) = %v, %v, want 99, %v", name, b, x, 1000+inc) |
| } |
| |
| CheckF(name+".M", i.Method(0).Interface().(func(int, byte) (byte, int)), inc) |
| } |
| |
| var TinterType = TypeOf(new(Tinter)).Elem() |
| var tinterType = TypeOf(new(tinter)).Elem() |
| |
| CheckI := func(name string, i interface{}, inc int) { |
| v := ValueOf(i) |
| CheckV(name, v, inc) |
| CheckV("(i="+name+")", v.Convert(TinterType), inc) |
| } |
| |
| sv := Tsmallv(1) |
| CheckI("sv", sv, 1) |
| CheckI("&sv", &sv, 1) |
| |
| sp := Tsmallp(2) |
| CheckI("&sp", &sp, 2) |
| |
| wv := Twordv(3) |
| CheckI("wv", wv, 3) |
| CheckI("&wv", &wv, 3) |
| |
| wp := Twordp(4) |
| CheckI("&wp", &wp, 4) |
| |
| bv := Tbigv([2]uintptr{5, 6}) |
| CheckI("bv", bv, 11) |
| CheckI("&bv", &bv, 11) |
| |
| bp := Tbigp([2]uintptr{7, 8}) |
| CheckI("&bp", &bp, 15) |
| |
| t4 := Tm4{} |
| t3 := Tm3{&t4} |
| t2 := Tm2{&t3} |
| t1 := Tm1{t2} |
| CheckI("t4", t4, 40) |
| CheckI("&t4", &t4, 40) |
| CheckI("t3", t3, 40) |
| CheckI("&t3", &t3, 40) |
| CheckI("t2", t2, 40) |
| CheckI("&t2", &t2, 40) |
| CheckI("t1", t1, 40) |
| CheckI("&t1", &t1, 40) |
| |
| methodShouldPanic := func(name string, i interface{}) { |
| v := ValueOf(i) |
| m := v.Method(0) |
| shouldPanic(func() { m.Call([]Value{ValueOf(1000), ValueOf(byte(99))}) }) |
| shouldPanic(func() { m.Interface() }) |
| |
| v = v.Convert(tinterType) |
| m = v.Method(0) |
| shouldPanic(func() { m.Call([]Value{ValueOf(1000), ValueOf(byte(99))}) }) |
| shouldPanic(func() { m.Interface() }) |
| } |
| |
| _sv := tsmallv(1) |
| methodShouldPanic("_sv", _sv) |
| methodShouldPanic("&_sv", &_sv) |
| |
| _sp := tsmallp(2) |
| methodShouldPanic("&_sp", &_sp) |
| |
| _wv := twordv(3) |
| methodShouldPanic("_wv", _wv) |
| methodShouldPanic("&_wv", &_wv) |
| |
| _wp := twordp(4) |
| methodShouldPanic("&_wp", &_wp) |
| |
| _bv := tbigv([2]uintptr{5, 6}) |
| methodShouldPanic("_bv", _bv) |
| methodShouldPanic("&_bv", &_bv) |
| |
| _bp := tbigp([2]uintptr{7, 8}) |
| methodShouldPanic("&_bp", &_bp) |
| |
| var tnil Tinter |
| vnil := ValueOf(&tnil).Elem() |
| shouldPanic(func() { vnil.Method(0) }) |
| } |
| |
| func TestInterfaceSet(t *testing.T) { |
| p := &Point{3, 4} |
| |
| var s struct { |
| I interface{} |
| P interface { |
| Dist(int) int |
| } |
| } |
| sv := ValueOf(&s).Elem() |
| sv.Field(0).Set(ValueOf(p)) |
| if q := s.I.(*Point); q != p { |
| t.Errorf("i: have %p want %p", q, p) |
| } |
| |
| pv := sv.Field(1) |
| pv.Set(ValueOf(p)) |
| if q := s.P.(*Point); q != p { |
| t.Errorf("i: have %p want %p", q, p) |
| } |
| |
| i := pv.Method(0).Call([]Value{ValueOf(10)})[0].Int() |
| if i != 250 { |
| t.Errorf("Interface Method returned %d; want 250", i) |
| } |
| } |
| |
| type T1 struct { |
| a string |
| int |
| } |
| |
| func TestAnonymousFields(t *testing.T) { |
| var field StructField |
| var ok bool |
| var t1 T1 |
| type1 := TypeOf(t1) |
| if field, ok = type1.FieldByName("int"); !ok { |
| t.Fatal("no field 'int'") |
| } |
| if field.Index[0] != 1 { |
| t.Error("field index should be 1; is", field.Index) |
| } |
| } |
| |
| type FTest struct { |
| s interface{} |
| name string |
| index []int |
| value int |
| } |
| |
| type D1 struct { |
| d int |
| } |
| type D2 struct { |
| d int |
| } |
| |
| type S0 struct { |
| A, B, C int |
| D1 |
| D2 |
| } |
| |
| type S1 struct { |
| B int |
| S0 |
| } |
| |
| type S2 struct { |
| A int |
| *S1 |
| } |
| |
| type S1x struct { |
| S1 |
| } |
| |
| type S1y struct { |
| S1 |
| } |
| |
| type S3 struct { |
| S1x |
| S2 |
| D, E int |
| *S1y |
| } |
| |
| type S4 struct { |
| *S4 |
| A int |
| } |
| |
| // The X in S6 and S7 annihilate, but they also block the X in S8.S9. |
| type S5 struct { |
| S6 |
| S7 |
| S8 |
| } |
| |
| type S6 struct { |
| X int |
| } |
| |
| type S7 S6 |
| |
| type S8 struct { |
| S9 |
| } |
| |
| type S9 struct { |
| X int |
| Y int |
| } |
| |
| // The X in S11.S6 and S12.S6 annihilate, but they also block the X in S13.S8.S9. |
| type S10 struct { |
| S11 |
| S12 |
| S13 |
| } |
| |
| type S11 struct { |
| S6 |
| } |
| |
| type S12 struct { |
| S6 |
| } |
| |
| type S13 struct { |
| S8 |
| } |
| |
| // The X in S15.S11.S1 and S16.S11.S1 annihilate. |
| type S14 struct { |
| S15 |
| S16 |
| } |
| |
| type S15 struct { |
| S11 |
| } |
| |
| type S16 struct { |
| S11 |
| } |
| |
| var fieldTests = []FTest{ |
| {struct{}{}, "", nil, 0}, |
| {struct{}{}, "Foo", nil, 0}, |
| {S0{A: 'a'}, "A", []int{0}, 'a'}, |
| {S0{}, "D", nil, 0}, |
| {S1{S0: S0{A: 'a'}}, "A", []int{1, 0}, 'a'}, |
| {S1{B: 'b'}, "B", []int{0}, 'b'}, |
| {S1{}, "S0", []int{1}, 0}, |
| {S1{S0: S0{C: 'c'}}, "C", []int{1, 2}, 'c'}, |
| {S2{A: 'a'}, "A", []int{0}, 'a'}, |
| {S2{}, "S1", []int{1}, 0}, |
| {S2{S1: &S1{B: 'b'}}, "B", []int{1, 0}, 'b'}, |
| {S2{S1: &S1{S0: S0{C: 'c'}}}, "C", []int{1, 1, 2}, 'c'}, |
| {S2{}, "D", nil, 0}, |
| {S3{}, "S1", nil, 0}, |
| {S3{S2: S2{A: 'a'}}, "A", []int{1, 0}, 'a'}, |
| {S3{}, "B", nil, 0}, |
| {S3{D: 'd'}, "D", []int{2}, 0}, |
| {S3{E: 'e'}, "E", []int{3}, 'e'}, |
| {S4{A: 'a'}, "A", []int{1}, 'a'}, |
| {S4{}, "B", nil, 0}, |
| {S5{}, "X", nil, 0}, |
| {S5{}, "Y", []int{2, 0, 1}, 0}, |
| {S10{}, "X", nil, 0}, |
| {S10{}, "Y", []int{2, 0, 0, 1}, 0}, |
| {S14{}, "X", nil, 0}, |
| } |
| |
| func TestFieldByIndex(t *testing.T) { |
| for _, test := range fieldTests { |
| s := TypeOf(test.s) |
| f := s.FieldByIndex(test.index) |
| if f.Name != "" { |
| if test.index != nil { |
| if f.Name != test.name { |
| t.Errorf("%s.%s found; want %s", s.Name(), f.Name, test.name) |
| } |
| } else { |
| t.Errorf("%s.%s found", s.Name(), f.Name) |
| } |
| } else if len(test.index) > 0 { |
| t.Errorf("%s.%s not found", s.Name(), test.name) |
| } |
| |
| if test.value != 0 { |
| v := ValueOf(test.s).FieldByIndex(test.index) |
| if v.IsValid() { |
| if x, ok := v.Interface().(int); ok { |
| if x != test.value { |
| t.Errorf("%s%v is %d; want %d", s.Name(), test.index, x, test.value) |
| } |
| } else { |
| t.Errorf("%s%v value not an int", s.Name(), test.index) |
| } |
| } else { |
| t.Errorf("%s%v value not found", s.Name(), test.index) |
| } |
| } |
| } |
| } |
| |
| func TestFieldByName(t *testing.T) { |
| for _, test := range fieldTests { |
| s := TypeOf(test.s) |
| f, found := s.FieldByName(test.name) |
| if found { |
| if test.index != nil { |
| // Verify field depth and index. |
| if len(f.Index) != len(test.index) { |
| t.Errorf("%s.%s depth %d; want %d: %v vs %v", s.Name(), test.name, len(f.Index), len(test.index), f.Index, test.index) |
| } else { |
| for i, x := range f.Index { |
| if x != test.index[i] { |
| t.Errorf("%s.%s.Index[%d] is %d; want %d", s.Name(), test.name, i, x, test.index[i]) |
| } |
| } |
| } |
| } else { |
| t.Errorf("%s.%s found", s.Name(), f.Name) |
| } |
| } else if len(test.index) > 0 { |
| t.Errorf("%s.%s not found", s.Name(), test.name) |
| } |
| |
| if test.value != 0 { |
| v := ValueOf(test.s).FieldByName(test.name) |
| if v.IsValid() { |
| if x, ok := v.Interface().(int); ok { |
| if x != test.value { |
| t.Errorf("%s.%s is %d; want %d", s.Name(), test.name, x, test.value) |
| } |
| } else { |
| t.Errorf("%s.%s value not an int", s.Name(), test.name) |
| } |
| } else { |
| t.Errorf("%s.%s value not found", s.Name(), test.name) |
| } |
| } |
| } |
| } |
| |
| func TestImportPath(t *testing.T) { |
| tests := []struct { |
| t Type |
| path string |
| }{ |
| {TypeOf(&base64.Encoding{}).Elem(), "encoding/base64"}, |
| {TypeOf(int(0)), ""}, |
| {TypeOf(int8(0)), ""}, |
| {TypeOf(int16(0)), ""}, |
| {TypeOf(int32(0)), ""}, |
| {TypeOf(int64(0)), ""}, |
| {TypeOf(uint(0)), ""}, |
| {TypeOf(uint8(0)), ""}, |
| {TypeOf(uint16(0)), ""}, |
| {TypeOf(uint32(0)), ""}, |
| {TypeOf(uint64(0)), ""}, |
| {TypeOf(uintptr(0)), ""}, |
| {TypeOf(float32(0)), ""}, |
| {TypeOf(float64(0)), ""}, |
| {TypeOf(complex64(0)), ""}, |
| {TypeOf(complex128(0)), ""}, |
| {TypeOf(byte(0)), ""}, |
| {TypeOf(rune(0)), ""}, |
| {TypeOf([]byte(nil)), ""}, |
| {TypeOf([]rune(nil)), ""}, |
| {TypeOf(string("")), ""}, |
| {TypeOf((*interface{})(nil)).Elem(), ""}, |
| {TypeOf((*byte)(nil)), ""}, |
| {TypeOf((*rune)(nil)), ""}, |
| {TypeOf((*int64)(nil)), ""}, |
| {TypeOf(map[string]int{}), ""}, |
| {TypeOf((*error)(nil)).Elem(), ""}, |
| } |
| for _, test := range tests { |
| if path := test.t.PkgPath(); path != test.path { |
| t.Errorf("%v.PkgPath() = %q, want %q", test.t, path, test.path) |
| } |
| } |
| } |
| |
| func TestVariadicType(t *testing.T) { |
| // Test example from Type documentation. |
| var f func(x int, y ...float64) |
| typ := TypeOf(f) |
| if typ.NumIn() == 2 && typ.In(0) == TypeOf(int(0)) { |
| sl := typ.In(1) |
| if sl.Kind() == Slice { |
| if sl.Elem() == TypeOf(0.0) { |
| // ok |
| return |
| } |
| } |
| } |
| |
| // Failed |
| t.Errorf("want NumIn() = 2, In(0) = int, In(1) = []float64") |
| s := fmt.Sprintf("have NumIn() = %d", typ.NumIn()) |
| for i := 0; i < typ.NumIn(); i++ { |
| s += fmt.Sprintf(", In(%d) = %s", i, typ.In(i)) |
| } |
| t.Error(s) |
| } |
| |
| type inner struct { |
| x int |
| } |
| |
| type outer struct { |
| y int |
| inner |
| } |
| |
| func (*inner) m() {} |
| func (*outer) m() {} |
| |
| func TestNestedMethods(t *testing.T) { |
| typ := TypeOf((*outer)(nil)) |
| if typ.NumMethod() != 1 || typ.Method(0).Func.Pointer() != ValueOf((*outer).m).Pointer() { |
| t.Errorf("Wrong method table for outer: (m=%p)", (*outer).m) |
| for i := 0; i < typ.NumMethod(); i++ { |
| m := typ.Method(i) |
| t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Pointer()) |
| } |
| } |
| } |
| |
| type InnerInt struct { |
| X int |
| } |
| |
| type OuterInt struct { |
| Y int |
| InnerInt |
| } |
| |
| func (i *InnerInt) M() int { |
| return i.X |
| } |
| |
| func TestEmbeddedMethods(t *testing.T) { |
| typ := TypeOf((*OuterInt)(nil)) |
| if typ.NumMethod() != 1 || typ.Method(0).Func.Pointer() != ValueOf((*OuterInt).M).Pointer() { |
| t.Errorf("Wrong method table for OuterInt: (m=%p)", (*OuterInt).M) |
| for i := 0; i < typ.NumMethod(); i++ { |
| m := typ.Method(i) |
| t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Pointer()) |
| } |
| } |
| |
| i := &InnerInt{3} |
| if v := ValueOf(i).Method(0).Call(nil)[0].Int(); v != 3 { |
| t.Errorf("i.M() = %d, want 3", v) |
| } |
| |
| o := &OuterInt{1, InnerInt{2}} |
| if v := ValueOf(o).Method(0).Call(nil)[0].Int(); v != 2 { |
| t.Errorf("i.M() = %d, want 2", v) |
| } |
| |
| f := (*OuterInt).M |
| if v := f(o); v != 2 { |
| t.Errorf("f(o) = %d, want 2", v) |
| } |
| } |
| |
| func TestPtrTo(t *testing.T) { |
| var i int |
| |
| typ := TypeOf(i) |
| for i = 0; i < 100; i++ { |
| typ = PtrTo(typ) |
| } |
| for i = 0; i < 100; i++ { |
| typ = typ.Elem() |
| } |
| if typ != TypeOf(i) { |
| t.Errorf("after 100 PtrTo and Elem, have %s, want %s", typ, TypeOf(i)) |
| } |
| } |
| |
| func TestPtrToGC(t *testing.T) { |
| type T *uintptr |
| tt := TypeOf(T(nil)) |
| pt := PtrTo(tt) |
| const n = 100 |
| var x []interface{} |
| for i := 0; i < n; i++ { |
| v := New(pt) |
| p := new(*uintptr) |
| *p = new(uintptr) |
| **p = uintptr(i) |
| v.Elem().Set(ValueOf(p).Convert(pt)) |
| x = append(x, v.Interface()) |
| } |
| runtime.GC() |
| |
| for i, xi := range x { |
| k := ValueOf(xi).Elem().Elem().Elem().Interface().(uintptr) |
| if k != uintptr(i) { |
| t.Errorf("lost x[%d] = %d, want %d", i, k, i) |
| } |
| } |
| } |
| |
| func TestAddr(t *testing.T) { |
| var p struct { |
| X, Y int |
| } |
| |
| v := ValueOf(&p) |
| v = v.Elem() |
| v = v.Addr() |
| v = v.Elem() |
| v = v.Field(0) |
| v.SetInt(2) |
| if p.X != 2 { |
| t.Errorf("Addr.Elem.Set failed to set value") |
| } |
| |
| // Again but take address of the ValueOf value. |
| // Exercises generation of PtrTypes not present in the binary. |
| q := &p |
| v = ValueOf(&q).Elem() |
| v = v.Addr() |
| v = v.Elem() |
| v = v.Elem() |
| v = v.Addr() |
| v = v.Elem() |
| v = v.Field(0) |
| v.SetInt(3) |
| if p.X != 3 { |
| t.Errorf("Addr.Elem.Set failed to set value") |
| } |
| |
| // Starting without pointer we should get changed value |
| // in interface. |
| qq := p |
| v = ValueOf(&qq).Elem() |
| v0 := v |
| v = v.Addr() |
| v = v.Elem() |
| v = v.Field(0) |
| v.SetInt(4) |
| if p.X != 3 { // should be unchanged from last time |
| t.Errorf("somehow value Set changed original p") |
| } |
| p = v0.Interface().(struct { |
| X, Y int |
| }) |
| if p.X != 4 { |
| t.Errorf("Addr.Elem.Set valued to set value in top value") |
| } |
| |
| // Verify that taking the address of a type gives us a pointer |
| // which we can convert back using the usual interface |
| // notation. |
| var s struct { |
| B *bool |
| } |
| ps := ValueOf(&s).Elem().Field(0).Addr().Interface() |
| *(ps.(**bool)) = new(bool) |
| if s.B == nil { |
| t.Errorf("Addr.Interface direct assignment failed") |
| } |
| } |
| |
| func noAlloc(t *testing.T, n int, f func(int)) { |
| if testing.Short() { |
| t.Skip("skipping malloc count in short mode") |
| } |
| if runtime.GOMAXPROCS(0) > 1 { |
| t.Skip("skipping; GOMAXPROCS>1") |
| } |
| i := -1 |
| allocs := testing.AllocsPerRun(n, func() { |
| f(i) |
| i++ |
| }) |
| if allocs > 0 { |
| t.Errorf("%d iterations: got %v mallocs, want 0", n, allocs) |
| } |
| } |
| |
| func TestAllocations(t *testing.T) { |
| noAlloc(t, 100, func(j int) { |
| var i interface{} |
| var v Value |
| |
| // We can uncomment this when compiler escape analysis |
| // is good enough to see that the integer assigned to i |
| // does not escape and therefore need not be allocated. |
| // |
| // i = 42 + j |
| // v = ValueOf(i) |
| // if int(v.Int()) != 42+j { |
| // panic("wrong int") |
| // } |
| |
| i = func(j int) int { return j } |
| v = ValueOf(i) |
| if v.Interface().(func(int) int)(j) != j { |
| panic("wrong result") |
| } |
| }) |
| } |
| |
| func TestSmallNegativeInt(t *testing.T) { |
| i := int16(-1) |
| v := ValueOf(i) |
| if v.Int() != -1 { |
| t.Errorf("int16(-1).Int() returned %v", v.Int()) |
| } |
| } |
| |
| func TestIndex(t *testing.T) { |
| xs := []byte{1, 2, 3, 4, 5, 6, 7, 8} |
| v := ValueOf(xs).Index(3).Interface().(byte) |
| if v != xs[3] { |
| t.Errorf("xs.Index(3) = %v; expected %v", v, xs[3]) |
| } |
| xa := [8]byte{10, 20, 30, 40, 50, 60, 70, 80} |
| v = ValueOf(xa).Index(2).Interface().(byte) |
| if v != xa[2] { |
| t.Errorf("xa.Index(2) = %v; expected %v", v, xa[2]) |
| } |
| s := "0123456789" |
| v = ValueOf(s).Index(3).Interface().(byte) |
| if v != s[3] { |
| t.Errorf("s.Index(3) = %v; expected %v", v, s[3]) |
| } |
| } |
| |
| func TestSlice(t *testing.T) { |
| xs := []int{1, 2, 3, 4, 5, 6, 7, 8} |
| v := ValueOf(xs).Slice(3, 5).Interface().([]int) |
| if len(v) != 2 { |
| t.Errorf("len(xs.Slice(3, 5)) = %d", len(v)) |
| } |
| if cap(v) != 5 { |
| t.Errorf("cap(xs.Slice(3, 5)) = %d", cap(v)) |
| } |
| if !DeepEqual(v[0:5], xs[3:]) { |
| t.Errorf("xs.Slice(3, 5)[0:5] = %v", v[0:5]) |
| } |
| xa := [8]int{10, 20, 30, 40, 50, 60, 70, 80} |
| v = ValueOf(&xa).Elem().Slice(2, 5).Interface().([]int) |
| if len(v) != 3 { |
| t.Errorf("len(xa.Slice(2, 5)) = %d", len(v)) |
| } |
| if cap(v) != 6 { |
| t.Errorf("cap(xa.Slice(2, 5)) = %d", cap(v)) |
| } |
| if !DeepEqual(v[0:6], xa[2:]) { |
| t.Errorf("xs.Slice(2, 5)[0:6] = %v", v[0:6]) |
| } |
| s := "0123456789" |
| vs := ValueOf(s).Slice(3, 5).Interface().(string) |
| if vs != s[3:5] { |
| t.Errorf("s.Slice(3, 5) = %q; expected %q", vs, s[3:5]) |
| } |
| |
| rv := ValueOf(&xs).Elem() |
| rv = rv.Slice(3, 4) |
| ptr2 := rv.Pointer() |
| rv = rv.Slice(5, 5) |
| ptr3 := rv.Pointer() |
| if ptr3 != ptr2 { |
| t.Errorf("xs.Slice(3,4).Slice3(5,5).Pointer() = %#x, want %#x", ptr3, ptr2) |
| } |
| } |
| |
| func TestSlice3(t *testing.T) { |
| xs := []int{1, 2, 3, 4, 5, 6, 7, 8} |
| v := ValueOf(xs).Slice3(3, 5, 7).Interface().([]int) |
| if len(v) != 2 { |
| t.Errorf("len(xs.Slice3(3, 5, 7)) = %d", len(v)) |
| } |
| if cap(v) != 4 { |
| t.Errorf("cap(xs.Slice3(3, 5, 7)) = %d", cap(v)) |
| } |
| if !DeepEqual(v[0:4], xs[3:7:7]) { |
| t.Errorf("xs.Slice3(3, 5, 7)[0:4] = %v", v[0:4]) |
| } |
| rv := ValueOf(&xs).Elem() |
| shouldPanic(func() { rv.Slice3(1, 2, 1) }) |
| shouldPanic(func() { rv.Slice3(1, 1, 11) }) |
| shouldPanic(func() { rv.Slice3(2, 2, 1) }) |
| |
| xa := [8]int{10, 20, 30, 40, 50, 60, 70, 80} |
| v = ValueOf(&xa).Elem().Slice3(2, 5, 6).Interface().([]int) |
| if len(v) != 3 { |
| t.Errorf("len(xa.Slice(2, 5, 6)) = %d", len(v)) |
| } |
| if cap(v) != 4 { |
| t.Errorf("cap(xa.Slice(2, 5, 6)) = %d", cap(v)) |
| } |
| if !DeepEqual(v[0:4], xa[2:6:6]) { |
| t.Errorf("xs.Slice(2, 5, 6)[0:4] = %v", v[0:4]) |
| } |
| rv = ValueOf(&xa).Elem() |
| shouldPanic(func() { rv.Slice3(1, 2, 1) }) |
| shouldPanic(func() { rv.Slice3(1, 1, 11) }) |
| shouldPanic(func() { rv.Slice3(2, 2, 1) }) |
| |
| s := "hello world" |
| rv = ValueOf(&s).Elem() |
| shouldPanic(func() { rv.Slice3(1, 2, 3) }) |
| |
| rv = ValueOf(&xs).Elem() |
| rv = rv.Slice3(3, 5, 7) |
| ptr2 := rv.Pointer() |
| rv = rv.Slice3(4, 4, 4) |
| ptr3 := rv.Pointer() |
| if ptr3 != ptr2 { |
| t.Errorf("xs.Slice3(3,5,7).Slice3(4,4,4).Pointer() = %#x, want %#x", ptr3, ptr2) |
| } |
| } |
| |
| func TestSetLenCap(t *testing.T) { |
| xs := []int{1, 2, 3, 4, 5, 6, 7, 8} |
| xa := [8]int{10, 20, 30, 40, 50, 60, 70, 80} |
| |
| vs := ValueOf(&xs).Elem() |
| shouldPanic(func() { vs.SetLen(10) }) |
| shouldPanic(func() { vs.SetCap(10) }) |
| shouldPanic(func() { vs.SetLen(-1) }) |
| shouldPanic(func() { vs.SetCap(-1) }) |
| shouldPanic(func() { vs.SetCap(6) }) // smaller than len |
| vs.SetLen(5) |
| if len(xs) != 5 || cap(xs) != 8 { |
| t.Errorf("after SetLen(5), len, cap = %d, %d, want 5, 8", len(xs), cap(xs)) |
| } |
| vs.SetCap(6) |
| if len(xs) != 5 || cap(xs) != 6 { |
| t.Errorf("after SetCap(6), len, cap = %d, %d, want 5, 6", len(xs), cap(xs)) |
| } |
| vs.SetCap(5) |
| if len(xs) != 5 || cap(xs) != 5 { |
| t.Errorf("after SetCap(5), len, cap = %d, %d, want 5, 5", len(xs), cap(xs)) |
| } |
| shouldPanic(func() { vs.SetCap(4) }) // smaller than len |
| shouldPanic(func() { vs.SetLen(6) }) // bigger than cap |
| |
| va := ValueOf(&xa).Elem() |
| shouldPanic(func() { va.SetLen(8) }) |
| shouldPanic(func() { va.SetCap(8) }) |
| } |
| |
| func TestVariadic(t *testing.T) { |
| var b bytes.Buffer |
| V := ValueOf |
| |
| b.Reset() |
| V(fmt.Fprintf).Call([]Value{V(&b), V("%s, %d world"), V("hello"), V(42)}) |
| if b.String() != "hello, 42 world" { |
| t.Errorf("after Fprintf Call: %q != %q", b.String(), "hello 42 world") |
| } |
| |
| b.Reset() |
| V(fmt.Fprintf).CallSlice([]Value{V(&b), V("%s, %d world"), V([]interface{}{"hello", 42})}) |
| if b.String() != "hello, 42 world" { |
| t.Errorf("after Fprintf CallSlice: %q != %q", b.String(), "hello 42 world") |
| } |
| } |
| |
| func TestFuncArg(t *testing.T) { |
| f1 := func(i int, f func(int) int) int { return f(i) } |
| f2 := func(i int) int { return i + 1 } |
| r := ValueOf(f1).Call([]Value{ValueOf(100), ValueOf(f2)}) |
| if r[0].Int() != 101 { |
| t.Errorf("function returned %d, want 101", r[0].Int()) |
| } |
| } |
| |
| func TestStructArg(t *testing.T) { |
| type padded struct { |
| B string |
| C int32 |
| } |
| var ( |
| gotA padded |
| gotB uint32 |
| wantA = padded{"3", 4} |
| wantB = uint32(5) |
| ) |
| f := func(a padded, b uint32) { |
| gotA, gotB = a, b |
| } |
| ValueOf(f).Call([]Value{ValueOf(wantA), ValueOf(wantB)}) |
| if gotA != wantA || gotB != wantB { |
| t.Errorf("function called with (%v, %v), want (%v, %v)", gotA, gotB, wantA, wantB) |
| } |
| } |
| |
| var tagGetTests = []struct { |
| Tag StructTag |
| Key string |
| Value string |
| }{ |
| {`protobuf:"PB(1,2)"`, `protobuf`, `PB(1,2)`}, |
| {`protobuf:"PB(1,2)"`, `foo`, ``}, |
| {`protobuf:"PB(1,2)"`, `rotobuf`, ``}, |
| {`protobuf:"PB(1,2)" json:"name"`, `json`, `name`}, |
| {`protobuf:"PB(1,2)" json:"name"`, `protobuf`, `PB(1,2)`}, |
| {`k0:"values contain spaces" k1:"and\ttabs"`, "k0", "values contain spaces"}, |
| {`k0:"values contain spaces" k1:"and\ttabs"`, "k1", "and\ttabs"}, |
| } |
| |
| func TestTagGet(t *testing.T) { |
| for _, tt := range tagGetTests { |
| if v := tt.Tag.Get(tt.Key); v != tt.Value { |
| t.Errorf("StructTag(%#q).Get(%#q) = %#q, want %#q", tt.Tag, tt.Key, v, tt.Value) |
| } |
| } |
| } |
| |
| func TestBytes(t *testing.T) { |
| type B []byte |
| x := B{1, 2, 3, 4} |
| y := ValueOf(x).Bytes() |
| if !bytes.Equal(x, y) { |
| t.Fatalf("ValueOf(%v).Bytes() = %v", x, y) |
| } |
| if &x[0] != &y[0] { |
| t.Errorf("ValueOf(%p).Bytes() = %p", &x[0], &y[0]) |
| } |
| } |
| |
| func TestSetBytes(t *testing.T) { |
| type B []byte |
| var x B |
| y := []byte{1, 2, 3, 4} |
| ValueOf(&x).Elem().SetBytes(y) |
| if !bytes.Equal(x, y) { |
| t.Fatalf("ValueOf(%v).Bytes() = %v", x, y) |
| } |
| if &x[0] != &y[0] { |
| t.Errorf("ValueOf(%p).Bytes() = %p", &x[0], &y[0]) |
| } |
| } |
| |
| type Private struct { |
| x int |
| y **int |
| } |
| |
| func (p *Private) m() { |
| } |
| |
| type Public struct { |
| X int |
| Y **int |
| } |
| |
| func (p *Public) M() { |
| } |
| |
| func TestUnexported(t *testing.T) { |
| var pub Public |
| v := ValueOf(&pub) |
| isValid(v.Elem().Field(0)) |
| isValid(v.Elem().Field(1)) |
| isValid(v.Elem().FieldByName("X")) |
| isValid(v.Elem().FieldByName("Y")) |
| isValid(v.Type().Method(0).Func) |
| isNonNil(v.Elem().Field(0).Interface()) |
| isNonNil(v.Elem().Field(1).Interface()) |
| isNonNil(v.Elem().FieldByName("X").Interface()) |
| isNonNil(v.Elem().FieldByName("Y").Interface()) |
| isNonNil(v.Type().Method(0).Func.Interface()) |
| |
| var priv Private |
| v = ValueOf(&priv) |
| isValid(v.Elem().Field(0)) |
| isValid(v.Elem().Field(1)) |
| isValid(v.Elem().FieldByName("x")) |
| isValid(v.Elem().FieldByName("y")) |
| isValid(v.Type().Method(0).Func) |
| shouldPanic(func() { v.Elem().Field(0).Interface() }) |
| shouldPanic(func() { v.Elem().Field(1).Interface() }) |
| shouldPanic(func() { v.Elem().FieldByName("x").Interface() }) |
| shouldPanic(func() { v.Elem().FieldByName("y").Interface() }) |
| shouldPanic(func() { v.Type().Method(0).Func.Interface() }) |
| } |
| |
| func shouldPanic(f func()) { |
| defer func() { |
| if recover() == nil { |
| panic("did not panic") |
| } |
| }() |
| f() |
| } |
| |
| func isNonNil(x interface{}) { |
| if x == nil { |
| panic("nil interface") |
| } |
| } |
| |
| func isValid(v Value) { |
| if !v.IsValid() { |
| panic("zero Value") |
| } |
| } |
| |
| func TestAlias(t *testing.T) { |
| x := string("hello") |
| v := ValueOf(&x).Elem() |
| oldvalue := v.Interface() |
| v.SetString("world") |
| newvalue := v.Interface() |
| |
| if oldvalue != "hello" || newvalue != "world" { |
| t.Errorf("aliasing: old=%q new=%q, want hello, world", oldvalue, newvalue) |
| } |
| } |
| |
| var V = ValueOf |
| |
| func EmptyInterfaceV(x interface{}) Value { |
| return ValueOf(&x).Elem() |
| } |
| |
| func ReaderV(x io.Reader) Value { |
| return ValueOf(&x).Elem() |
| } |
| |
| func ReadWriterV(x io.ReadWriter) Value { |
| return ValueOf(&x).Elem() |
| } |
| |
| type Empty struct{} |
| type MyString string |
| type MyBytes []byte |
| type MyRunes []int32 |
| type MyFunc func() |
| type MyByte byte |
| |
| var convertTests = []struct { |
| in Value |
| out Value |
| }{ |
| // numbers |
| /* |
| Edit .+1,/\*\//-1>cat >/tmp/x.go && go run /tmp/x.go |
| |
| package main |
| |
| import "fmt" |
| |
| var numbers = []string{ |
| "int8", "uint8", "int16", "uint16", |
| "int32", "uint32", "int64", "uint64", |
| "int", "uint", "uintptr", |
| "float32", "float64", |
| } |
| |
| func main() { |
| // all pairs but in an unusual order, |
| // to emit all the int8, uint8 cases |
| // before n grows too big. |
| n := 1 |
| for i, f := range numbers { |
| for _, g := range numbers[i:] { |
| fmt.Printf("\t{V(%s(%d)), V(%s(%d))},\n", f, n, g, n) |
| n++ |
| if f != g { |
| fmt.Printf("\t{V(%s(%d)), V(%s(%d))},\n", g, n, f, n) |
| n++ |
| } |
| } |
| } |
| } |
| */ |
| {V(int8(1)), V(int8(1))}, |
| {V(int8(2)), V(uint8(2))}, |
| {V(uint8(3)), V(int8(3))}, |
| {V(int8(4)), V(int16(4))}, |
| {V(int16(5)), V(int8(5))}, |
| {V(int8(6)), V(uint16(6))}, |
| {V(uint16(7)), V(int8(7))}, |
| {V(int8(8)), V(int32(8))}, |
| {V(int32(9)), V(int8(9))}, |
| {V(int8(10)), V(uint32(10))}, |
| {V(uint32(11)), V(int8(11))}, |
| {V(int8(12)), V(int64(12))}, |
| {V(int64(13)), V(int8(13))}, |
| {V(int8(14)), V(uint64(14))}, |
| {V(uint64(15)), V(int8(15))}, |
| {V(int8(16)), V(int(16))}, |
| {V(int(17)), V(int8(17))}, |
| {V(int8(18)), V(uint(18))}, |
| {V(uint(19)), V(int8(19))}, |
| {V(int8(20)), V(uintptr(20))}, |
| {V(uintptr(21)), V(int8(21))}, |
| {V(int8(22)), V(float32(22))}, |
| {V(float32(23)), V(int8(23))}, |
| {V(int8(24)), V(float64(24))}, |
| {V(float64(25)), V(int8(25))}, |
| {V(uint8(26)), V(uint8(26))}, |
| {V(uint8(27)), V(int16(27))}, |
| {V(int16(28)), V(uint8(28))}, |
| {V(uint8(29)), V(uint16(29))}, |
| {V(uint16(30)), V(uint8(30))}, |
| {V(uint8(31)), V(int32(31))}, |
| {V(int32(32)), V(uint8(32))}, |
| {V(uint8(33)), V(uint32(33))}, |
| {V(uint32(34)), V(uint8(34))}, |
| {V(uint8(35)), V(int64(35))}, |
| {V(int64(36)), V(uint8(36))}, |
| {V(uint8(37)), V(uint64(37))}, |
| {V(uint64(38)), V(uint8(38))}, |
| {V(uint8(39)), V(int(39))}, |
| {V(int(40)), V(uint8(40))}, |
| {V(uint8(41)), V(uint(41))}, |
| {V(uint(42)), V(uint8(42))}, |
| {V(uint8(43)), V(uintptr(43))}, |
| {V(uintptr(44)), V(uint8(44))}, |
| {V(uint8(45)), V(float32(45))}, |
| {V(float32(46)), V(uint8(46))}, |
| {V(uint8(47)), V(float64(47))}, |
| {V(float64(48)), V(uint8(48))}, |
| {V(int16(49)), V(int16(49))}, |
| {V(int16(50)), V(uint16(50))}, |
| {V(uint16(51)), V(int16(51))}, |
| {V(int16(52)), V(int32(52))}, |
| {V(int32(53)), V(int16(53))}, |
| {V(int16(54)), V(uint32(54))}, |
| {V(uint32(55)), V(int16(55))}, |
| {V(int16(56)), V(int64(56))}, |
| {V(int64(57)), V(int16(57))}, |
| {V(int16(58)), V(uint64(58))}, |
| {V(uint64(59)), V(int16(59))}, |
| {V(int16(60)), V(int(60))}, |
| {V(int(61)), V(int16(61))}, |
| {V(int16(62)), V(uint(62))}, |
| {V(uint(63)), V(int16(63))}, |
| {V(int16(64)), V(uintptr(64))}, |
| {V(uintptr(65)), V(int16(65))}, |
| {V(int16(66)), V(float32(66))}, |
| {V(float32(67)), V(int16(67))}, |
| {V(int16(68)), V(float64(68))}, |
| {V(float64(69)), V(int16(69))}, |
| {V(uint16(70)), V(uint16(70))}, |
| {V(uint16(71)), V(int32(71))}, |
| {V(int32(72)), V(uint16(72))}, |
| {V(uint16(73)), V(uint32(73))}, |
| {V(uint32(74)), V(uint16(74))}, |
| {V(uint16(75)), V(int64(75))}, |
| {V(int64(76)), V(uint16(76))}, |
| {V(uint16(77)), V(uint64(77))}, |
| {V(uint64(78)), V(uint16(78))}, |
| {V(uint16(79)), V(int(79))}, |
| {V(int(80)), V(uint16(80))}, |
| {V(uint16(81)), V(uint(81))}, |
| {V(uint(82)), V(uint16(82))}, |
| {V(uint16(83)), V(uintptr(83))}, |
| {V(uintptr(84)), V(uint16(84))}, |
| {V(uint16(85)), V(float32(85))}, |
| {V(float32(86)), V(uint16(86))}, |
| {V(uint16(87)), V(float64(87))}, |
| {V(float64(88)), V(uint16(88))}, |
| {V(int32(89)), V(int32(89))}, |
| {V(int32(90)), V(uint32(90))}, |
| {V(uint32(91)), V(int32(91))}, |
| {V(int32(92)), V(int64(92))}, |
| {V(int64(93)), V(int32(93))}, |
| {V(int32(94)), V(uint64(94))}, |
| {V(uint64(95)), V(int32(95))}, |
| {V(int32(96)), V(int(96))}, |
| {V(int(97)), V(int32(97))}, |
| {V(int32(98)), V(uint(98))}, |
| {V(uint(99)), V(int32(99))}, |
| {V(int32(100)), V(uintptr(100))}, |
| {V(uintptr(101)), V(int32(101))}, |
| {V(int32(102)), V(float32(102))}, |
| {V(float32(103)), V(int32(103))}, |
| {V(int32(104)), V(float64(104))}, |
| {V(float64(105)), V(int32(105))}, |
| {V(uint32(106)), V(uint32(106))}, |
| {V(uint32(107)), V(int64(107))}, |
| {V(int64(108)), V(uint32(108))}, |
| {V(uint32(109)), V(uint64(109))}, |
| {V(uint64(110)), V(uint32(110))}, |
| {V(uint32(111)), V(int(111))}, |
| {V(int(112)), V(uint32(112))}, |
| {V(uint32(113)), V(uint(113))}, |
| {V(uint(114)), V(uint32(114))}, |
| {V(uint32(115)), V(uintptr(115))}, |
| {V(uintptr(116)), V(uint32(116))}, |
| {V(uint32(117)), V(float32(117))}, |
| {V(float32(118)), V(uint32(118))}, |
| {V(uint32(119)), V(float64(119))}, |
| {V(float64(120)), V(uint32(120))}, |
| {V(int64(121)), V(int64(121))}, |
| {V(int64(122)), V(uint64(122))}, |
| {V(uint64(123)), V(int64(123))}, |
| {V(int64(124)), V(int(124))}, |
| {V(int(125)), V(int64(125))}, |
| {V(int64(126)), V(uint(126))}, |
| {V(uint(127)), V(int64(127))}, |
| {V(int64(128)), V(uintptr(128))}, |
| {V(uintptr(129)), V(int64(129))}, |
| {V(int64(130)), V(float32(130))}, |
| {V(float32(131)), V(int64(131))}, |
| {V(int64(132)), V(float64(132))}, |
| {V(float64(133)), V(int64(133))}, |
| {V(uint64(134)), V(uint64(134))}, |
| {V(uint64(135)), V(int(135))}, |
| {V(int(136)), V(uint64(136))}, |
| {V(uint64(137)), V(uint(137))}, |
| {V(uint(138)), V(uint64(138))}, |
| {V(uint64(139)), V(uintptr(139))}, |
| {V(uintptr(140)), V(uint64(140))}, |
| {V(uint64(141)), V(float32(141))}, |
| {V(float32(142)), V(uint64(142))}, |
| {V(uint64(143)), V(float64(143))}, |
| {V(float64(144)), V(uint64(144))}, |
| {V(int(145)), V(int(145))}, |
| {V(int(146)), V(uint(146))}, |
| {V(uint(147)), V(int(147))}, |
| {V(int(148)), V(uintptr(148))}, |
| {V(uintptr(149)), V(int(149))}, |
| {V(int(150)), V(float32(150))}, |
| {V(float32(151)), V(int(151))}, |
| {V(int(152)), V(float64(152))}, |
| {V(float64(153)), V(int(153))}, |
| {V(uint(154)), V(uint(154))}, |
| {V(uint(155)), V(uintptr(155))}, |
| {V(uintptr(156)), V(uint(156))}, |
| {V(uint(157)), V(float32(157))}, |
| {V(float32(158)), V(uint(158))}, |
| {V(uint(159)), V(float64(159))}, |
| {V(float64(160)), V(uint(160))}, |
| {V(uintptr(161)), V(uintptr(161))}, |
| {V(uintptr(162)), V(float32(162))}, |
| {V(float32(163)), V(uintptr(163))}, |
| {V(uintptr(164)), V(float64(164))}, |
| {V(float64(165)), V(uintptr(165))}, |
| {V(float32(166)), V(float32(166))}, |
| {V(float32(167)), V(float64(167))}, |
| {V(float64(168)), V(float32(168))}, |
| {V(float64(169)), V(float64(169))}, |
| |
| // truncation |
| {V(float64(1.5)), V(int(1))}, |
| |
| // complex |
| {V(complex64(1i)), V(complex64(1i))}, |
| {V(complex64(2i)), V(complex128(2i))}, |
| {V(complex128(3i)), V(complex64(3i))}, |
| {V(complex128(4i)), V(complex128(4i))}, |
| |
| // string |
| {V(string("hello")), V(string("hello"))}, |
| {V(string("bytes1")), V([]byte("bytes1"))}, |
| {V([]byte("bytes2")), V(string("bytes2"))}, |
| {V([]byte("bytes3")), V([]byte("bytes3"))}, |
| {V(string("runes♝")), V([]rune("runes♝"))}, |
| {V([]rune("runes♕")), V(string("runes♕"))}, |
| {V([]rune("runes🙈🙉🙊")), V([]rune("runes🙈🙉🙊"))}, |
| {V(int('a')), V(string("a"))}, |
| {V(int8('a')), V(string("a"))}, |
| {V(int16('a')), V(string("a"))}, |
| {V(int32('a')), V(string("a"))}, |
| {V(int64('a')), V(string("a"))}, |
| {V(uint('a')), V(string("a"))}, |
| {V(uint8('a')), V(string("a"))}, |
| {V(uint16('a')), V(string("a"))}, |
| {V(uint32('a')), V(string("a"))}, |
| {V(uint64('a')), V(string("a"))}, |
| {V(uintptr('a')), V(string("a"))}, |
| {V(int(-1)), V(string("\uFFFD"))}, |
| {V(int8(-2)), V(string("\uFFFD"))}, |
| {V(int16(-3)), V(string("\uFFFD"))}, |
| {V(int32(-4)), V(string("\uFFFD"))}, |
| {V(int64(-5)), V(string("\uFFFD"))}, |
| {V(uint(0x110001)), V(string("\uFFFD"))}, |
| {V(uint32(0x110002)), V(string("\uFFFD"))}, |
| {V(uint64(0x110003)), V(string("\uFFFD"))}, |
| {V(uintptr(0x110004)), V(string("\uFFFD"))}, |
| |
| // named string |
| {V(MyString("hello")), V(string("hello"))}, |
| {V(string("hello")), V(MyString("hello"))}, |
| {V(string("hello")), V(string("hello"))}, |
| {V(MyString("hello")), V(MyString("hello"))}, |
| {V(MyString("bytes1")), V([]byte("bytes1"))}, |
| {V([]byte("bytes2")), V(MyString("bytes2"))}, |
| {V([]byte("bytes3")), V([]byte("bytes3"))}, |
| {V(MyString("runes♝")), V([]rune("runes♝"))}, |
| {V([]rune("runes♕")), V(MyString("runes♕"))}, |
| {V([]rune("runes🙈🙉🙊")), V([]rune("runes🙈🙉🙊"))}, |
| {V([]rune("runes🙈🙉🙊")), V(MyRunes("runes🙈🙉🙊"))}, |
| {V(MyRunes("runes🙈🙉🙊")), V([]rune("runes🙈🙉🙊"))}, |
| {V(int('a')), V(MyString("a"))}, |
| {V(int8('a')), V(MyString("a"))}, |
| {V(int16('a')), V(MyString("a"))}, |
| {V(int32('a')), V(MyString("a"))}, |
| {V(int64('a')), V(MyString("a"))}, |
| {V(uint('a')), V(MyString("a"))}, |
| {V(uint8('a')), V(MyString("a"))}, |
| {V(uint16('a')), V(MyString("a"))}, |
| {V(uint32('a')), V(MyString("a"))}, |
| {V(uint64('a')), V(MyString("a"))}, |
| {V(uintptr('a')), V(MyString("a"))}, |
| {V(int(-1)), V(MyString("\uFFFD"))}, |
| {V(int8(-2)), V(MyString("\uFFFD"))}, |
| {V(int16(-3)), V(MyString("\uFFFD"))}, |
| {V(int32(-4)), V(MyString("\uFFFD"))}, |
| {V(int64(-5)), V(MyString("\uFFFD"))}, |
| {V(uint(0x110001)), V(MyString("\uFFFD"))}, |
| {V(uint32(0x110002)), V(MyString("\uFFFD"))}, |
| {V(uint64(0x110003)), V(MyString("\uFFFD"))}, |
| {V(uintptr(0x110004)), V(MyString("\uFFFD"))}, |
| |
| // named []byte |
| {V(string("bytes1")), V(MyBytes("bytes1"))}, |
| {V(MyBytes("bytes2")), V(string("bytes2"))}, |
| {V(MyBytes("bytes3")), V(MyBytes("bytes3"))}, |
| {V(MyString("bytes1")), V(MyBytes("bytes1"))}, |
| {V(MyBytes("bytes2")), V(MyString("bytes2"))}, |
| |
| // named []rune |
| {V(string("runes♝")), V(MyRunes("runes♝"))}, |
| {V(MyRunes("runes♕")), V(string("runes♕"))}, |
| {V(MyRunes("runes🙈🙉🙊")), V(MyRunes("runes🙈🙉🙊"))}, |
| {V(MyString("runes♝")), V(MyRunes("runes♝"))}, |
| {V(MyRunes("runes♕")), V(MyString("runes♕"))}, |
| |
| // named types and equal underlying types |
| {V(new(int)), V(new(integer))}, |
| {V(new(integer)), V(new(int))}, |
| {V(Empty{}), V(struct{}{})}, |
| {V(new(Empty)), V(new(struct{}))}, |
| {V(struct{}{}), V(Empty{})}, |
| {V(new(struct{})), V(new(Empty))}, |
| {V(Empty{}), V(Empty{})}, |
| {V(MyBytes{}), V([]byte{})}, |
| {V([]byte{}), V(MyBytes{})}, |
| {V((func())(nil)), V(MyFunc(nil))}, |
| {V((MyFunc)(nil)), V((func())(nil))}, |
| |
| // can convert *byte and *MyByte |
| {V((*byte)(nil)), V((*MyByte)(nil))}, |
| {V((*MyByte)(nil)), V((*byte)(nil))}, |
| |
| // cannot convert mismatched array sizes |
| {V([2]byte{}), V([2]byte{})}, |
| {V([3]byte{}), V([3]byte{})}, |
| |
| // cannot convert other instances |
| {V((**byte)(nil)), V((**byte)(nil))}, |
| {V((**MyByte)(nil)), V((**MyByte)(nil))}, |
| {V((chan byte)(nil)), V((chan byte)(nil))}, |
| {V((chan MyByte)(nil)), V((chan MyByte)(nil))}, |
| {V(([]byte)(nil)), V(([]byte)(nil))}, |
| {V(([]MyByte)(nil)), V(([]MyByte)(nil))}, |
| {V((map[int]byte)(nil)), V((map[int]byte)(nil))}, |
| {V((map[int]MyByte)(nil)), V((map[int]MyByte)(nil))}, |
| {V((map[byte]int)(nil)), V((map[byte]int)(nil))}, |
| {V((map[MyByte]int)(nil)), V((map[MyByte]int)(nil))}, |
| {V([2]byte{}), V([2]byte{})}, |
| {V([2]MyByte{}), V([2]MyByte{})}, |
| |
| // other |
| {V((***int)(nil)), V((***int)(nil))}, |
| {V((***byte)(nil)), V((***byte)(nil))}, |
| {V((***int32)(nil)), V((***int32)(nil))}, |
| {V((***int64)(nil)), V((***int64)(nil))}, |
| {V((chan int)(nil)), V((<-chan int)(nil))}, |
| {V((chan int)(nil)), V((chan<- int)(nil))}, |
| {V((chan string)(nil)), V((<-chan string)(nil))}, |
| {V((chan string)(nil)), V((chan<- string)(nil))}, |
| {V((chan byte)(nil)), V((chan byte)(nil))}, |
| {V((chan MyByte)(nil)), V((chan MyByte)(nil))}, |
| {V((map[int]bool)(nil)), V((map[int]bool)(nil))}, |
| {V((map[int]byte)(nil)), V((map[int]byte)(nil))}, |
| {V((map[uint]bool)(nil)), V((map[uint]bool)(nil))}, |
| {V([]uint(nil)), V([]uint(nil))}, |
| {V([]int(nil)), V([]int(nil))}, |
| {V(new(interface{})), V(new(interface{}))}, |
| {V(new(io.Reader)), V(new(io.Reader))}, |
| {V(new(io.Writer)), V(new(io.Writer))}, |
| |
| // interfaces |
| {V(int(1)), EmptyInterfaceV(int(1))}, |
| {V(string("hello")), EmptyInterfaceV(string("hello"))}, |
| {V(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))}, |
| {ReadWriterV(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))}, |
| {V(new(bytes.Buffer)), ReadWriterV(new(bytes.Buffer))}, |
| } |
| |
| func TestConvert(t *testing.T) { |
| canConvert := map[[2]Type]bool{} |
| all := map[Type]bool{} |
| |
| for _, tt := range convertTests { |
| t1 := tt.in.Type() |
| if !t1.ConvertibleTo(t1) { |
| t.Errorf("(%s).ConvertibleTo(%s) = false, want true", t1, t1) |
| continue |
| } |
| |
| t2 := tt.out.Type() |
| if !t1.ConvertibleTo(t2) { |
| t.Errorf("(%s).ConvertibleTo(%s) = false, want true", t1, t2) |
| continue |
| } |
| |
| all[t1] = true |
| all[t2] = true |
| canConvert[[2]Type{t1, t2}] = true |
| |
| // vout1 represents the in value converted to the in type. |
| v1 := tt.in |
| vout1 := v1.Convert(t1) |
| out1 := vout1.Interface() |
| if vout1.Type() != tt.in.Type() || !DeepEqual(out1, tt.in.Interface()) { |
| t.Errorf("ValueOf(%T(%[1]v)).Convert(%s) = %T(%[3]v), want %T(%[4]v)", tt.in.Interface(), t1, out1, tt.in.Interface()) |
| } |
| |
| // vout2 represents the in value converted to the out type. |
| vout2 := v1.Convert(t2) |
| out2 := vout2.Interface() |
| if vout2.Type() != tt.out.Type() || !DeepEqual(out2, tt.out.Interface()) { |
| t.Errorf("ValueOf(%T(%[1]v)).Convert(%s) = %T(%[3]v), want %T(%[4]v)", tt.in.Interface(), t2, out2, tt.out.Interface()) |
| } |
| |
| // vout3 represents a new value of the out type, set to vout2. This makes |
| // sure the converted value vout2 is really usable as a regular value. |
| vout3 := New(t2).Elem() |
| vout3.Set(vout2) |
| out3 := vout3.Interface() |
| if vout3.Type() != tt.out.Type() || !DeepEqual(out3, tt.out.Interface()) { |
| t.Errorf("Set(ValueOf(%T(%[1]v)).Convert(%s)) = %T(%[3]v), want %T(%[4]v)", tt.in.Interface(), t2, out3, tt.out.Interface()) |
| } |
| |
| if IsRO(v1) { |
| t.Errorf("table entry %v is RO, should not be", v1) |
| } |
| if IsRO(vout1) { |
| t.Errorf("self-conversion output %v is RO, should not be", vout1) |
| } |
| if IsRO(vout2) { |
| t.Errorf("conversion output %v is RO, should not be", vout2) |
| } |
| if IsRO(vout3) { |
| t.Errorf("set(conversion output) %v is RO, should not be", vout3) |
| } |
| if !IsRO(MakeRO(v1).Convert(t1)) { |
| t.Errorf("RO self-conversion output %v is not RO, should be", v1) |
| } |
| if !IsRO(MakeRO(v1).Convert(t2)) { |
| t.Errorf("RO conversion output %v is not RO, should be", v1) |
| } |
| } |
| |
| // Assume that of all the types we saw during the tests, |
| // if there wasn't an explicit entry for a conversion between |
| // a pair of types, then it's not to be allowed. This checks for |
| // things like 'int64' converting to '*int'. |
| for t1 := range all { |
| for t2 := range all { |
| expectOK := t1 == t2 || canConvert[[2]Type{t1, t2}] || t2.Kind() == Interface && t2.NumMethod() == 0 |
| if ok := t1.ConvertibleTo(t2); ok != expectOK { |
| t.Errorf("(%s).ConvertibleTo(%s) = %v, want %v", t1, t2, ok, expectOK) |
| } |
| } |
| } |
| } |
| |
| type ComparableStruct struct { |
| X int |
| } |
| |
| type NonComparableStruct struct { |
| X int |
| Y map[string]int |
| } |
| |
| var comparableTests = []struct { |
| typ Type |
| ok bool |
| }{ |
| {TypeOf(1), true}, |
| {TypeOf("hello"), true}, |
| {TypeOf(new(byte)), true}, |
| {TypeOf((func())(nil)), false}, |
| {TypeOf([]byte{}), false}, |
| {TypeOf(map[string]int{}), false}, |
| {TypeOf(make(chan int)), true}, |
| {TypeOf(1.5), true}, |
| {TypeOf(false), true}, |
| {TypeOf(1i), true}, |
| {TypeOf(ComparableStruct{}), true}, |
| {TypeOf(NonComparableStruct{}), false}, |
| {TypeOf([10]map[string]int{}), false}, |
| {TypeOf([10]string{}), true}, |
| {TypeOf(new(interface{})).Elem(), true}, |
| } |
| |
| func TestComparable(t *testing.T) { |
| for _, tt := range comparableTests { |
| if ok := tt.typ.Comparable(); ok != tt.ok { |
| t.Errorf("TypeOf(%v).Comparable() = %v, want %v", tt.typ, ok, tt.ok) |
| } |
| } |
| } |
| |
| func TestOverflow(t *testing.T) { |
| if ovf := V(float64(0)).OverflowFloat(1e300); ovf { |
| t.Errorf("%v wrongly overflows float64", 1e300) |
| } |
| |
| maxFloat32 := float64((1<<24 - 1) << (127 - 23)) |
| if ovf := V(float32(0)).OverflowFloat(maxFloat32); ovf { |
| t.Errorf("%v wrongly overflows float32", maxFloat32) |
| } |
| ovfFloat32 := float64((1<<24-1)<<(127-23) + 1<<(127-52)) |
| if ovf := V(float32(0)).OverflowFloat(ovfFloat32); !ovf { |
| t.Errorf("%v should overflow float32", ovfFloat32) |
| } |
| if ovf := V(float32(0)).OverflowFloat(-ovfFloat32); !ovf { |
| t.Errorf("%v should overflow float32", -ovfFloat32) |
| } |
| |
| maxInt32 := int64(0x7fffffff) |
| if ovf := V(int32(0)).OverflowInt(maxInt32); ovf { |
| t.Errorf("%v wrongly overflows int32", maxInt32) |
| } |
| if ovf := V(int32(0)).OverflowInt(-1 << 31); ovf { |
| t.Errorf("%v wrongly overflows int32", -int64(1)<<31) |
| } |
| ovfInt32 := int64(1 << 31) |
| if ovf := V(int32(0)).OverflowInt(ovfInt32); !ovf { |
| t.Errorf("%v should overflow int32", ovfInt32) |
| } |
| |
| maxUint32 := uint64(0xffffffff) |
| if ovf := V(uint32(0)).OverflowUint(maxUint32); ovf { |
| t.Errorf("%v wrongly overflows uint32", maxUint32) |
| } |
| ovfUint32 := uint64(1 << 32) |
| if ovf := V(uint32(0)).OverflowUint(ovfUint32); !ovf { |
| t.Errorf("%v should overflow uint32", ovfUint32) |
| } |
| } |
| |
| func checkSameType(t *testing.T, x, y interface{}) { |
| if TypeOf(x) != TypeOf(y) { |
| t.Errorf("did not find preexisting type for %s (vs %s)", TypeOf(x), TypeOf(y)) |
| } |
| } |
| |
| func TestArrayOf(t *testing.T) { |
| // check construction and use of type not in binary |
| for _, table := range []struct { |
| n int |
| value func(i int) interface{} |
| comparable bool |
| want string |
| }{ |
| { |
| n: 0, |
| value: func(i int) interface{} { type Tint int; return Tint(i) }, |
| comparable: true, |
| want: "[]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tint int; return Tint(i) }, |
| comparable: true, |
| want: "[0 1 2 3 4 5 6 7 8 9]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tfloat float64; return Tfloat(i) }, |
| comparable: true, |
| want: "[0 1 2 3 4 5 6 7 8 9]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tstring string; return Tstring(strconv.Itoa(i)) }, |
| comparable: true, |
| want: "[0 1 2 3 4 5 6 7 8 9]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tstruct struct{ V int }; return Tstruct{i} }, |
| comparable: true, |
| want: "[{0} {1} {2} {3} {4} {5} {6} {7} {8} {9}]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tint int; return []Tint{Tint(i)} }, |
| comparable: false, |
| want: "[[0] [1] [2] [3] [4] [5] [6] [7] [8] [9]]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tint int; return [1]Tint{Tint(i)} }, |
| comparable: true, |
| want: "[[0] [1] [2] [3] [4] [5] [6] [7] [8] [9]]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tstruct struct{ V [1]int }; return Tstruct{[1]int{i}} }, |
| comparable: true, |
| want: "[{[0]} {[1]} {[2]} {[3]} {[4]} {[5]} {[6]} {[7]} {[8]} {[9]}]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type Tstruct struct{ V []int }; return Tstruct{[]int{i}} }, |
| comparable: false, |
| want: "[{[0]} {[1]} {[2]} {[3]} {[4]} {[5]} {[6]} {[7]} {[8]} {[9]}]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { type TstructUV struct{ U, V int }; return TstructUV{i, i} }, |
| comparable: true, |
| want: "[{0 0} {1 1} {2 2} {3 3} {4 4} {5 5} {6 6} {7 7} {8 8} {9 9}]", |
| }, |
| { |
| n: 10, |
| value: func(i int) interface{} { |
| type TstructUV struct { |
| U int |
| V float64 |
| } |
| return TstructUV{i, float64(i)} |
| }, |
| comparable: true, |
| want: "[{0 0} {1 1} {2 2} {3 3} {4 4} {5 5} {6 6} {7 7} {8 8} {9 9}]", |
| }, |
| } { |
| at := ArrayOf(table.n, TypeOf(table.value(0))) |
| v := New(at).Elem() |
| vok := New(at).Elem() |
| vnot := New(at).Elem() |
| for i := 0; i < v.Len(); i++ { |
| v.Index(i).Set(ValueOf(table.value(i))) |
| vok.Index(i).Set(ValueOf(table.value(i))) |
| j := i |
| if i+1 == v.Len() { |
| j = i + 1 |
| } |
| vnot.Index(i).Set(ValueOf(table.value(j))) // make it differ only by last element |
| } |
| s := fmt.Sprint(v.Interface()) |
| if s != table.want { |
| t.Errorf("constructed array = %s, want %s", s, table.want) |
| } |
| |
| if table.comparable != at.Comparable() { |
| t.Errorf("constructed array (%#v) is comparable=%v, want=%v", v.Interface(), at.Comparable(), table.comparable) |
| } |
| if table.comparable { |
| if table.n > 0 { |
| if DeepEqual(vnot.Interface(), v.Interface()) { |
| t.Errorf( |
| "arrays (%#v) compare ok (but should not)", |
| v.Interface(), |
| ) |
| } |
| } |
| if !DeepEqual(vok.Interface(), v.Interface()) { |
| t.Errorf( |
| "arrays (%#v) compare NOT-ok (but should)", |
| v.Interface(), |
| ) |
| } |
| } |
| } |
| |
| // check that type already in binary is found |
| type T int |
| checkSameType(t, Zero(ArrayOf(5, TypeOf(T(1)))).Interface(), [5]T{}) |
| } |
| |
| func TestArrayOfGC(t *testing.T) { |
| type T *uintptr |
| tt := TypeOf(T(nil)) |
| const n = 100 |
| var x []interface{} |
| for i := 0; i < n; i++ { |
| v := New(ArrayOf(n, tt)).Elem() |
| for j := 0; j < v.Len(); j++ { |
| p := new(uintptr) |
| *p = uintptr(i*n + j) |
| v.Index(j).Set(ValueOf(p).Convert(tt)) |
| } |
| x = append(x, v.Interface()) |
| } |
| runtime.GC() |
| |
| for i, xi := range x { |
| v := ValueOf(xi) |
| for j := 0; j < v.Len(); j++ { |
| k := v.Index(j).Elem().Interface() |
| if k != uintptr(i*n+j) { |
| t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) |
| } |
| } |
| } |
| } |
| |
| func TestArrayOfAlg(t *testing.T) { |
| at := ArrayOf(6, TypeOf(byte(0))) |
| v1 := New(at).Elem() |
| v2 := New(at).Elem() |
| if v1.Interface() != v1.Interface() { |
| t.Errorf("constructed array %v not equal to itself", v1.Interface()) |
| } |
| v1.Index(5).Set(ValueOf(byte(1))) |
| if i1, i2 := v1.Interface(), v2.Interface(); i1 == i2 { |
| t.Errorf("constructed arrays %v and %v should not be equal", i1, i2) |
| } |
| |
| at = ArrayOf(6, TypeOf([]int(nil))) |
| v1 = New(at).Elem() |
| shouldPanic(func() { _ = v1.Interface() == v1.Interface() }) |
| } |
| |
| func TestArrayOfGenericAlg(t *testing.T) { |
| at1 := ArrayOf(5, TypeOf(string(""))) |
| at := ArrayOf(6, at1) |
| v1 := New(at).Elem() |
| v2 := New(at).Elem() |
| if v1.Interface() != v1.Interface() { |
| t.Errorf("constructed array %v not equal to itself", v1.Interface()) |
| } |
| |
| v1.Index(0).Index(0).Set(ValueOf("abc")) |
| v2.Index(0).Index(0).Set(ValueOf("efg")) |
| if i1, i2 := v1.Interface(), v2.Interface(); i1 == i2 { |
| t.Errorf("constructed arrays %v and %v should not be equal", i1, i2) |
| } |
| |
| v1.Index(0).Index(0).Set(ValueOf("abc")) |
| v2.Index(0).Index(0).Set(ValueOf((v1.Index(0).Index(0).String() + " ")[:3])) |
| if i1, i2 := v1.Interface(), v2.Interface(); i1 != i2 { |
| t.Errorf("constructed arrays %v and %v should be equal", i1, i2) |
| } |
| |
| // Test hash |
| m := MakeMap(MapOf(at, TypeOf(int(0)))) |
| m.SetMapIndex(v1, ValueOf(1)) |
| if i1, i2 := v1.Interface(), v2.Interface(); !m.MapIndex(v2).IsValid() { |
| t.Errorf("constructed arrays %v and %v have different hashes", i1, i2) |
| } |
| } |
| |
| func TestArrayOfDirectIface(t *testing.T) { |
| { |
| type T [1]*byte |
| i1 := Zero(TypeOf(T{})).Interface() |
| v1 := ValueOf(&i1).Elem() |
| p1 := v1.InterfaceData()[1] |
| |
| i2 := Zero(ArrayOf(1, PtrTo(TypeOf(int8(0))))).Interface() |
| v2 := ValueOf(&i2).Elem() |
| p2 := v2.InterfaceData()[1] |
| |
| if p1 != 0 { |
| t.Errorf("got p1=%v. want=%v", p1, nil) |
| } |
| |
| if p2 != 0 { |
| t.Errorf("got p2=%v. want=%v", p2, nil) |
| } |
| } |
| { |
| type T [0]*byte |
| i1 := Zero(TypeOf(T{})).Interface() |
| v1 := ValueOf(&i1).Elem() |
| p1 := v1.InterfaceData()[1] |
| |
| i2 := Zero(ArrayOf(0, PtrTo(TypeOf(int8(0))))).Interface() |
| v2 := ValueOf(&i2).Elem() |
| p2 := v2.InterfaceData()[1] |
| |
| if p1 == 0 { |
| t.Errorf("got p1=%v. want=not-%v", p1, nil) |
| } |
| |
| if p2 == 0 { |
| t.Errorf("got p2=%v. want=not-%v", p2, nil) |
| } |
| } |
| } |
| |
| func TestSliceOf(t *testing.T) { |
| // check construction and use of type not in binary |
| type T int |
| st := SliceOf(TypeOf(T(1))) |
| v := MakeSlice(st, 10, 10) |
| runtime.GC() |
| for i := 0; i < v.Len(); i++ { |
| v.Index(i).Set(ValueOf(T(i))) |
| runtime.GC() |
| } |
| s := fmt.Sprint(v.Interface()) |
| want := "[0 1 2 3 4 5 6 7 8 9]" |
| if s != want { |
| t.Errorf("constructed slice = %s, want %s", s, want) |
| } |
| |
| // check that type already in binary is found |
| type T1 int |
| checkSameType(t, Zero(SliceOf(TypeOf(T1(1)))).Interface(), []T1{}) |
| } |
| |
| func TestSliceOverflow(t *testing.T) { |
| // check that MakeSlice panics when size of slice overflows uint |
| const S = 1e6 |
| s := uint(S) |
| l := (1<<(unsafe.Sizeof((*byte)(nil))*8)-1)/s + 1 |
| if l*s >= s { |
| t.Fatal("slice size does not overflow") |
| } |
| var x [S]byte |
| st := SliceOf(TypeOf(x)) |
| defer func() { |
| err := recover() |
| if err == nil { |
| t.Fatal("slice overflow does not panic") |
| } |
| }() |
| MakeSlice(st, int(l), int(l)) |
| } |
| |
| func TestSliceOfGC(t *testing.T) { |
| type T *uintptr |
| tt := TypeOf(T(nil)) |
| st := SliceOf(tt) |
| const n = 100 |
| var x []interface{} |
| for i := 0; i < n; i++ { |
| v := MakeSlice(st, n, n) |
| for j := 0; j < v.Len(); j++ { |
| p := new(uintptr) |
| *p = uintptr(i*n + j) |
| v.Index(j).Set(ValueOf(p).Convert(tt)) |
| } |
| x = append(x, v.Interface()) |
| } |
| runtime.GC() |
| |
| for i, xi := range x { |
| v := ValueOf(xi) |
| for j := 0; j < v.Len(); j++ { |
| k := v.Index(j).Elem().Interface() |
| if k != uintptr(i*n+j) { |
| t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) |
| } |
| } |
| } |
| } |
| |
| func TestChanOf(t *testing.T) { |
| // check construction and use of type not in binary |
| type T string |
| ct := ChanOf(BothDir, TypeOf(T(""))) |
| v := MakeChan(ct, 2) |
| runtime.GC() |
| v.Send(ValueOf(T("hello"))) |
| runtime.GC() |
| v.Send(ValueOf(T("world"))) |
| runtime.GC() |
| |
| sv1, _ := v.Recv() |
| sv2, _ := v.Recv() |
| s1 := sv1.String() |
| s2 := sv2.String() |
| if s1 != "hello" || s2 != "world" { |
| t.Errorf("constructed chan: have %q, %q, want %q, %q", s1, s2, "hello", "world") |
| } |
| |
| // check that type already in binary is found |
| type T1 int |
| checkSameType(t, Zero(ChanOf(BothDir, TypeOf(T1(1)))).Interface(), (chan T1)(nil)) |
| } |
| |
| func TestChanOfDir(t *testing.T) { |
| // check construction and use of type not in binary |
| type T string |
| crt := ChanOf(RecvDir, TypeOf(T(""))) |
| cst := ChanOf(SendDir, TypeOf(T(""))) |
| |
| // check that type already in binary is found |
| type T1 int |
| checkSameType(t, Zero(ChanOf(RecvDir, TypeOf(T1(1)))).Interface(), (<-chan T1)(nil)) |
| checkSameType(t, Zero(ChanOf(SendDir, TypeOf(T1(1)))).Interface(), (chan<- T1)(nil)) |
| |
| // check String form of ChanDir |
| if crt.ChanDir().String() != "<-chan" { |
| t.Errorf("chan dir: have %q, want %q", crt.ChanDir().String(), "<-chan") |
| } |
| if cst.ChanDir().String() != "chan<-" { |
| t.Errorf("chan dir: have %q, want %q", cst.ChanDir().String(), "chan<-") |
| } |
| } |
| |
| func TestChanOfGC(t *testing.T) { |
| done := make(chan bool, 1) |
| go func() { |
| select { |
| case <-done: |
| case <-time.After(5 * time.Second): |
| panic("deadlock in TestChanOfGC") |
| } |
| }() |
| |
| defer func() { |
| done <- true |
| }() |
| |
| type T *uintptr |
| tt := TypeOf(T(nil)) |
| ct := ChanOf(BothDir, tt) |
| |
| // NOTE: The garbage collector handles allocated channels specially, |
| // so we have to save pointers to channels in x; the pointer code will |
| // use the gc info in the newly constructed chan type. |
| const n = 100 |
| var x []interface{} |
| for i := 0; i < n; i++ { |
| v := MakeChan(ct, n) |
| for j := 0; j < n; j++ { |
| p := new(uintptr) |
| *p = uintptr(i*n + j) |
| v.Send(ValueOf(p).Convert(tt)) |
| } |
| pv := New(ct) |
| pv.Elem().Set(v) |
| x = append(x, pv.Interface()) |
| } |
| runtime.GC() |
| |
| for i, xi := range x { |
| v := ValueOf(xi).Elem() |
| for j := 0; j < n; j++ { |
| pv, _ := v.Recv() |
| k := pv.Elem().Interface() |
| if k != uintptr(i*n+j) { |
| t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) |
| } |
| } |
| } |
| } |
| |
| func TestMapOf(t *testing.T) { |
| // check construction and use of type not in binary |
| type K string |
| type V float64 |
| |
| v := MakeMap(MapOf(TypeOf(K("")), TypeOf(V(0)))) |
| runtime.GC() |
| v.SetMapIndex(ValueOf(K("a")), ValueOf(V(1))) |
| runtime.GC() |
| |
| s := fmt.Sprint(v.Interface()) |
| want := "map[a:1]" |
| if s != want { |
| t.Errorf("constructed map = %s, want %s", s, want) |
| } |
| |
| // check that type already in binary is found |
| checkSameType(t, Zero(MapOf(TypeOf(V(0)), TypeOf(K("")))).Interface(), map[V]K(nil)) |
| |
| // check that invalid key type panics |
| shouldPanic(func() { MapOf(TypeOf((func())(nil)), TypeOf(false)) }) |
| } |
| |
| func TestMapOfGCKeys(t *testing.T) { |
| type T *uintptr |
| tt := TypeOf(T(nil)) |
| mt := MapOf(tt, TypeOf(false)) |
| |
| // NOTE: The garbage collector handles allocated maps specially, |
| // so we have to save pointers to maps in x; the pointer code will |
| // use the gc info in the newly constructed map type. |
| const n = 100 |
| var x []interface{} |
| for i := 0; i < n; i++ { |
| v := MakeMap(mt) |
| for j := 0; j < n; j++ { |
| p := new(uintptr) |
| *p = uintptr(i*n + j) |
| v.SetMapIndex(ValueOf(p).Convert(tt), ValueOf(true)) |
| } |
| pv := New(mt) |
| pv.Elem().Set(v) |
| x = append(x, pv.Interface()) |
| } |
| runtime.GC() |
| |
| for i, xi := range x { |
| v := ValueOf(xi).Elem() |
| var out []int |
| for _, kv := range v.MapKeys() { |
| out = append(out, int(kv.Elem().Interface().(uintptr))) |
| } |
| sort.Ints(out) |
| for j, k := range out { |
| if k != i*n+j { |
| t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) |
| } |
| } |
| } |
| } |
| |
| func TestMapOfGCValues(t *testing.T) { |
| type T *uintptr |
| tt := TypeOf(T(nil)) |
| mt := MapOf(TypeOf(1), tt) |
| |
| // NOTE: The garbage collector handles allocated maps specially, |
| // so we have to save pointers to maps in x; the pointer code will |
| // use the gc info in the newly constructed map type. |
| const n = 100 |
| var x []interface{} |
| for i := 0; i < n; i++ { |
| v := MakeMap(mt) |
| for j := 0; j < n; j++ { |
| p := new(uintptr) |
| *p = uintptr(i*n + j) |
| v.SetMapIndex(ValueOf(j), ValueOf(p).Convert(tt)) |
| } |
| pv := New(mt) |
| pv.Elem().Set(v) |
| x = append(x, pv.Interface()) |
| } |
| runtime.GC() |
| |
| for i, xi := range x { |
| v := ValueOf(xi).Elem() |
| for j := 0; j < n; j++ { |
| k := v.MapIndex(ValueOf(j)).Elem().Interface().(uintptr) |
| if k != uintptr(i*n+j) { |
| t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) |
| } |
| } |
| } |
| } |
| |
| func TestTypelinksSorted(t *testing.T) { |
| var last string |
| for i, n := range TypeLinks() { |
| if n < last { |
| t.Errorf("typelinks not sorted: %q [%d] > %q [%d]", last, i-1, n, i) |
| } |
| last = n |
| } |
| } |
| |
| func TestFuncOf(t *testing.T) { |
| // check construction and use of type not in binary |
| type K string |
| type V float64 |
| |
| fn := func(args []Value) []Value { |
| if len(args) != 1 { |
| t.Errorf("args == %v, want exactly one arg", args) |
| } else if args[0].Type() != TypeOf(K("")) { |
| t.Errorf("args[0] is type %v, want %v", args[0].Type, TypeOf(K(""))) |
| } else if args[0].String() != "gopher" { |
| t.Errorf("args[0] = %q, want %q", args[0].String(), "gopher") |
| } |
| return []Value{ValueOf(V(3.14))} |
| } |
| v := MakeFunc(FuncOf([]Type{TypeOf(K(""))}, []Type{TypeOf(V(0))}, false), fn) |
| |
| outs := v.Call([]Value{ValueOf(K("gopher"))}) |
| if len(outs) != 1 { |
| t.Fatalf("v.Call returned %v, want exactly one result", outs) |
| } else if outs[0].Type() != TypeOf(V(0)) { |
| t.Fatalf("c.Call[0] is type %v, want %v", outs[0].Type, TypeOf(V(0))) |
| } |
| f := outs[0].Float() |
| if f != 3.14 { |
| t.Errorf("constructed func returned %f, want %f", f, 3.14) |
| } |
| |
| // check that types already in binary are found |
| type T1 int |
| testCases := []struct { |
| in, out []Type |
| variadic bool |
| want interface{} |
| }{ |
| {in: []Type{TypeOf(T1(0))}, want: (func(T1))(nil)}, |
| {in: []Type{TypeOf(int(0))}, want: (func(int))(nil)}, |
| {in: []Type{SliceOf(TypeOf(int(0)))}, variadic: true, want: (func(...int))(nil)}, |
| {in: []Type{TypeOf(int(0))}, out: []Type{TypeOf(false)}, want: (func(int) bool)(nil)}, |
| {in: []Type{TypeOf(int(0))}, out: []Type{TypeOf(false), TypeOf("")}, want: (func(int) (bool, string))(nil)}, |
| } |
| for _, tt := range testCases { |
| checkSameType(t, Zero(FuncOf(tt.in, tt.out, tt.variadic)).Interface(), tt.want) |
| } |
| |
| // check that variadic requires last element be a slice. |
| FuncOf([]Type{TypeOf(1), TypeOf(""), SliceOf(TypeOf(false))}, nil, true) |
| shouldPanic(func() { FuncOf([]Type{TypeOf(0), TypeOf(""), TypeOf(false)}, nil, true) }) |
| shouldPanic(func() { FuncOf(nil, nil, true) }) |
| } |
| |
| type B1 struct { |
| X int |
| Y int |
| Z int |
| } |
| |
| func BenchmarkFieldByName1(b *testing.B) { |
| t := TypeOf(B1{}) |
| for i := 0; i < b.N; i++ { |
| t.FieldByName("Z") |
| } |
| } |
| |
| func BenchmarkFieldByName2(b *testing.B) { |
| t := TypeOf(S3{}) |
| for i := 0; i < b.N; i++ { |
| t.FieldByName("B") |
| } |
| } |
| |
| type R0 struct { |
| *R1 |
| *R2 |
| *R3 |
| *R4 |
| } |
| |
| type R1 struct { |
| *R5 |
| *R6 |
| *R7 |
| *R8 |
| } |
| |
| type R2 R1 |
| type R3 R1 |
| type R4 R1 |
| |
| type R5 struct { |
| *R9 |
| *R10 |
| *R11 |
| *R12 |
| } |
| |
| type R6 R5 |
| type R7 R5 |
| type R8 R5 |
| |
| type R9 struct { |
| *R13 |
| *R14 |
| *R15 |
| *R16 |
| } |
| |
| type R10 R9 |
| type R11 R9 |
| type R12 R9 |
| |
| type R13 struct { |
| *R17 |
| *R18 |
| *R19 |
| *R20 |
| } |
| |
| type R14 R13 |
| type R15 R13 |
| type R16 R13 |
| |
| type R17 struct { |
| *R21 |
| *R22 |
| *R23 |
| *R24 |
| } |
| |
| type R18 R17 |
| type R19 R17 |
| type R20 R17 |
| |
| type R21 struct { |
| X int |
| } |
| |
| type R22 R21 |
| type R23 R21 |
| type R24 R21 |
| |
| func TestEmbed(t *testing.T) { |
| typ := TypeOf(R0{}) |
| f, ok := typ.FieldByName("X") |
| if ok { |
| t.Fatalf(`FieldByName("X") should fail, returned %v`, f.Index) |
| } |
| } |
| |
| func BenchmarkFieldByName3(b *testing.B) { |
| t := TypeOf(R0{}) |
| for i := 0; i < b.N; i++ { |
| t.FieldByName("X") |
| } |
| } |
| |
| type S struct { |
| i1 int64 |
| i2 int64 |
| } |
| |
| func BenchmarkInterfaceBig(b *testing.B) { |
| v := ValueOf(S{}) |
| for i := 0; i < b.N; i++ { |
| v.Interface() |
| } |
| b.StopTimer() |
| } |
| |
| func TestAllocsInterfaceBig(t *testing.T) { |
| if testing.Short() { |
| t.Skip("skipping malloc count in short mode") |
| } |
| v := ValueOf(S{}) |
| if allocs := testing.AllocsPerRun(100, func() { v.Interface() }); allocs > 0 { |
| t.Error("allocs:", allocs) |
| } |
| } |
| |
| func BenchmarkInterfaceSmall(b *testing.B) { |
| v := ValueOf(int64(0)) |
| for i := 0; i < b.N; i++ { |
| v.Interface() |
| } |
| } |
| |
| func TestAllocsInterfaceSmall(t *testing.T) { |
| if testing.Short() { |
| t.Skip("skipping malloc count in short mode") |
| } |
| v := ValueOf(int64(0)) |
| if allocs := testing.AllocsPerRun(100, func() { v.Interface() }); allocs > 0 { |
| t.Error("allocs:", allocs) |
| } |
| } |
| |
| // An exhaustive is a mechanism for writing exhaustive or stochastic tests. |
| // The basic usage is: |
| // |
| // for x.Next() { |
| // ... code using x.Maybe() or x.Choice(n) to create test cases ... |
| // } |
| // |
| // Each iteration of the loop returns a different set of results, until all |
| // possible result sets have been explored. It is okay for different code paths |
| // to make different method call sequences on x, but there must be no |
| // other source of non-determinism in the call sequences. |
| // |
| // When faced with a new decision, x chooses randomly. Future explorations |
| // of that path will choose successive values for the result. Thus, stopping |
| // the loop after a fixed number of iterations gives somewhat stochastic |
| // testing. |
| // |
| // Example: |
| // |
| // for x.Next() { |
| // v := make([]bool, x.Choose(4)) |
| // for i := range v { |
| // v[i] = x.Maybe() |
| // } |
| // fmt.Println(v) |
| // } |
| // |
| // prints (in some order): |
| // |
| // [] |
| // [false] |
| // [true] |
| // [false false] |
| // [false true] |
| // ... |
| // [true true] |
| // [false false false] |
| // ... |
| // [true true true] |
| // [false false false false] |
| // ... |
| // [true true true true] |
| // |
| type exhaustive struct { |
| r *rand.Rand |
| pos int |
| last []choice |
| } |
| |
| type choice struct { |
| off int |
| n int |
| max int |
| } |
| |
| func (x *exhaustive) Next() bool { |
| if x.r == nil { |
| x.r = rand.New(rand.NewSource(time.Now().UnixNano())) |
| } |
| x.pos = 0 |
| if x.last == nil { |
| x.last = []choice{} |
| return true |
| } |
| for i := len(x.last) - 1; i >= 0; i-- { |
| c := &x.last[i] |
| if c.n+1 < c.max { |
| c.n++ |
| x.last = x.last[:i+1] |
| return true |
| } |
| } |
| return false |
| } |
| |
| func (x *exhaustive) Choose(max int) int { |
| if x.pos >= len(x.last) { |
| x.last = append(x.last, choice{x.r.Intn(max), 0, max}) |
| } |
| c := &x.last[x.pos] |
| x.pos++ |
| if c.max != max { |
| panic("inconsistent use of exhaustive tester") |
| } |
| return (c.n + c.off) % max |
| } |
| |
| func (x *exhaustive) Maybe() bool { |
| return x.Choose(2) == 1 |
| } |
| |
| func GCFunc(args []Value) []Value { |
| runtime.GC() |
| return []Value{} |
| } |
| |
| func TestReflectFuncTraceback(t *testing.T) { |
| f := MakeFunc(TypeOf(func() {}), GCFunc) |
| f.Call([]Value{}) |
| } |
| |
| func TestReflectMethodTraceback(t *testing.T) { |
| p := Point{3, 4} |
| m := ValueOf(p).MethodByName("GCMethod") |
| i := ValueOf(m.Interface()).Call([]Value{ValueOf(5)})[0].Int() |
| if i != 8 { |
| t.Errorf("Call returned %d; want 8", i) |
| } |
| } |
| |
| func TestBigZero(t *testing.T) { |
| const size = 1 << 10 |
| var v [size]byte |
| z := Zero(ValueOf(v).Type()).Interface().([size]byte) |
| for i := 0; i < size; i++ { |
| if z[i] != 0 { |
| t.Fatalf("Zero object not all zero, index %d", i) |
| } |
| } |
| } |
| |
| func TestFieldByIndexNil(t *testing.T) { |
| type P struct { |
| F int |
| } |
| type T struct { |
| *P |
| } |
| v := ValueOf(T{}) |
| |
| v.FieldByName("P") // should be fine |
| |
| defer func() { |
| if err := recover(); err == nil { |
| t.Fatalf("no error") |
| } else if !strings.Contains(fmt.Sprint(err), "nil pointer to embedded struct") { |
| t.Fatalf(`err=%q, wanted error containing "nil pointer to embedded struct"`, err) |
| } |
| }() |
| v.FieldByName("F") // should panic |
| |
| t.Fatalf("did not panic") |
| } |
| |
| // Given |
| // type Outer struct { |
| // *Inner |
| // ... |
| // } |
| // the compiler generates the implementation of (*Outer).M dispatching to the embedded Inner. |
| // The implementation is logically: |
| // func (p *Outer) M() { |
| // (p.Inner).M() |
| // } |
| // but since the only change here is the replacement of one pointer receiver with another, |
| // the actual generated code overwrites the original receiver with the p.Inner pointer and |
| // then jumps to the M method expecting the *Inner receiver. |
| // |
| // During reflect.Value.Call, we create an argument frame and the associated data structures |
| // to describe it to the garbage collector, populate the frame, call reflect.call to |
| // run a function call using that frame, and then copy the results back out of the frame. |
| // The reflect.call function does a memmove of the frame structure onto the |
| // stack (to set up the inputs), runs the call, and the memmoves the stack back to |
| // the frame structure (to preserve the outputs). |
| // |
| // Originally reflect.call did not distinguish inputs from outputs: both memmoves |
| // were for the full stack frame. However, in the case where the called function was |
| // one of these wrappers, the rewritten receiver is almost certainly a different type |
| // than the original receiver. This is not a problem on the stack, where we use the |
| // program counter to determine the type information and understand that |
| // during (*Outer).M the receiver is an *Outer while during (*Inner).M the receiver in the same |
| // memory word is now an *Inner. But in the statically typed argument frame created |
| // by reflect, the receiver is always an *Outer. Copying the modified receiver pointer |
| // off the stack into the frame will store an *Inner there, and then if a garbage collection |
| // happens to scan that argument frame before it is discarded, it will scan the *Inner |
| // memory as if it were an *Outer. If the two have different memory layouts, the |
| // collection will intepret the memory incorrectly. |
| // |
| // One such possible incorrect interpretation is to treat two arbitrary memory words |
| // (Inner.P1 and Inner.P2 below) as an interface (Outer.R below). Because interpreting |
| // an interface requires dereferencing the itab word, the misinterpretation will try to |
| // deference Inner.P1, causing a crash during garbage collection. |
| // |
| // This came up in a real program in issue 7725. |
| |
| type Outer struct { |
| *Inner |
| R io.Reader |
| } |
| |
| type Inner struct { |
| X *Outer |
| P1 uintptr |
| P2 uintptr |
| } |
| |
| func (pi *Inner) M() { |
| // Clear references to pi so that the only way the |
| // garbage collection will find the pointer is in the |
| // argument frame, typed as a *Outer. |
| pi.X.Inner = nil |
| |
| // Set up an interface value that will cause a crash. |
| // P1 = 1 is a non-zero, so the interface looks non-nil. |
| // P2 = pi ensures that the data word points into the |
| // allocated heap; if not the collection skips the interface |
| // value as irrelevant, without dereferencing P1. |
| pi.P1 = 1 |
| pi.P2 = uintptr(unsafe.Pointer(pi)) |
| } |
| |
| func TestCallMethodJump(t *testing.T) { |
| // In reflect.Value.Call, trigger a garbage collection after reflect.call |
| // returns but before the args frame has been discarded. |
| // This is a little clumsy but makes the failure repeatable. |
| *CallGC = true |
| |
| p := &Outer{Inner: new(Inner)} |
| p.Inner.X = p |
| ValueOf(p).Method(0).Call(nil) |
| |
| // Stop garbage collecting during reflect.call. |
| *CallGC = false |
| } |
| |
| func TestMakeFuncStackCopy(t *testing.T) { |
| target := func(in []Value) []Value { |
| runtime.GC() |
| useStack(16) |
| return []Value{ValueOf(9)} |
| } |
| |
| var concrete func(*int, int) int |
| fn := MakeFunc(ValueOf(concrete).Type(), target) |
| ValueOf(&concrete).Elem().Set(fn) |
| x := concrete(nil, 7) |
| if x != 9 { |
| t.Errorf("have %#q want 9", x) |
| } |
| } |
| |
| // use about n KB of stack |
| func useStack(n int) { |
| if n == 0 { |
| return |
| } |
| var b [1024]byte // makes frame about 1KB |
| useStack(n - 1 + int(b[99])) |
| } |
| |
| type Impl struct{} |
| |
| func (Impl) f() {} |
| |
| func TestValueString(t *testing.T) { |
| rv := ValueOf(Impl{}) |
| if rv.String() != "<reflect_test.Impl Value>" { |
| t.Errorf("ValueOf(Impl{}).String() = %q, want %q", rv.String(), "<reflect_test.Impl Value>") |
| } |
| |
| method := rv.Method(0) |
| if method.String() != "<func() Value>" { |
| t.Errorf("ValueOf(Impl{}).Method(0).String() = %q, want %q", method.String(), "<func() Value>") |
| } |
| } |
| |
| func TestInvalid(t *testing.T) { |
| // Used to have inconsistency between IsValid() and Kind() != Invalid. |
| type T struct{ v interface{} } |
| |
| v := ValueOf(T{}).Field(0) |
| if v.IsValid() != true || v.Kind() != Interface { |
| t.Errorf("field: IsValid=%v, Kind=%v, want true, Interface", v.IsValid(), v.Kind()) |
| } |
| v = v.Elem() |
| if v.IsValid() != false || v.Kind() != Invalid { |
| t.Errorf("field elem: IsValid=%v, Kind=%v, want false, Invalid", v.IsValid(), v.Kind()) |
| } |
| } |
| |
| // Issue 8917. |
| func TestLargeGCProg(t *testing.T) { |
| fv := ValueOf(func([256]*byte) {}) |
| fv.Call([]Value{ValueOf([256]*byte{})}) |
| } |
| |
| // Issue 9179. |
| func TestCallGC(t *testing.T) { |
| f := func(a, b, c, d, e string) { |
| } |
| g := func(in []Value) []Value { |
| runtime.GC() |
| return nil |
| } |
| typ := ValueOf(f).Type() |
| f2 := MakeFunc(typ, g).Interface().(func(string, string, string, string, string)) |
| f2("four", "five5", "six666", "seven77", "eight888") |
| } |
| |
| type funcLayoutTest struct { |
| rcvr, t Type |
| size, argsize, retOffset uintptr |
| stack []byte |
| gc []byte |
| } |
| |
| var funcLayoutTests []funcLayoutTest |
| |
| func init() { |
| var argAlign = PtrSize |
| var naclExtra []byte |
| if runtime.GOARCH == "amd64p32" { |
| argAlign = 2 * PtrSize |
| naclExtra = append(naclExtra, BitsScalar) |
| } |
| roundup := func(x uintptr, a uintptr) uintptr { |
| return (x + a - 1) / a * a |
| } |
| |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| nil, |
| ValueOf(func(a, b string) string { return "" }).Type(), |
| 6 * PtrSize, |
| 4 * PtrSize, |
| 4 * PtrSize, |
| []byte{BitsPointer, BitsScalar, BitsPointer}, |
| []byte{BitsPointer, BitsScalar, BitsPointer, BitsScalar, BitsPointer, BitsScalar}, |
| }) |
| |
| var r, s []byte |
| if PtrSize == 4 { |
| r = []byte{BitsScalar, BitsScalar, BitsScalar, BitsPointer} |
| s = append([]byte{BitsScalar, BitsScalar, BitsScalar, BitsPointer, BitsScalar}, naclExtra...) |
| } else { |
| r = []byte{BitsScalar, BitsScalar, BitsPointer} |
| s = []byte{BitsScalar, BitsScalar, BitsPointer, BitsScalar} |
| } |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| nil, |
| ValueOf(func(a, b, c uint32, p *byte, d uint16) {}).Type(), |
| roundup(roundup(3*4, PtrSize)+PtrSize+2, argAlign), |
| roundup(3*4, PtrSize) + PtrSize + 2, |
| roundup(roundup(3*4, PtrSize)+PtrSize+2, argAlign), |
| r, |
| s, |
| }) |
| |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| nil, |
| ValueOf(func(a map[int]int, b uintptr, c interface{}) {}).Type(), |
| 4 * PtrSize, |
| 4 * PtrSize, |
| 4 * PtrSize, |
| []byte{BitsPointer, BitsScalar, BitsPointer, BitsPointer}, |
| []byte{BitsPointer, BitsScalar, BitsPointer, BitsPointer}, |
| }) |
| |
| type S struct { |
| a, b uintptr |
| c, d *byte |
| } |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| nil, |
| ValueOf(func(a S) {}).Type(), |
| 4 * PtrSize, |
| 4 * PtrSize, |
| 4 * PtrSize, |
| []byte{BitsScalar, BitsScalar, BitsPointer, BitsPointer}, |
| []byte{BitsScalar, BitsScalar, BitsPointer, BitsPointer}, |
| }) |
| |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| ValueOf((*byte)(nil)).Type(), |
| ValueOf(func(a uintptr, b *int) {}).Type(), |
| roundup(3*PtrSize, argAlign), |
| 3 * PtrSize, |
| roundup(3*PtrSize, argAlign), |
| []byte{BitsPointer, BitsScalar, BitsPointer}, |
| append([]byte{BitsPointer, BitsScalar, BitsPointer}, naclExtra...), |
| }) |
| |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| nil, |
| ValueOf(func(a uintptr) {}).Type(), |
| roundup(PtrSize, argAlign), |
| PtrSize, |
| roundup(PtrSize, argAlign), |
| []byte{}, |
| append([]byte{BitsScalar}, naclExtra...), |
| }) |
| |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| nil, |
| ValueOf(func() uintptr { return 0 }).Type(), |
| PtrSize, |
| 0, |
| 0, |
| []byte{}, |
| []byte{BitsScalar}, |
| }) |
| |
| funcLayoutTests = append(funcLayoutTests, |
| funcLayoutTest{ |
| ValueOf(uintptr(0)).Type(), |
| ValueOf(func(a uintptr) {}).Type(), |
| 2 * PtrSize, |
| 2 * PtrSize, |
| 2 * PtrSize, |
| []byte{BitsPointer}, |
| []byte{BitsPointer, BitsScalar}, |
| // Note: this one is tricky, as the receiver is not a pointer. But we |
| // pass the receiver by reference to the autogenerated pointer-receiver |
| // version of the function. |
| }) |
| } |
| |
| func TestFuncLayout(t *testing.T) { |
| for _, lt := range funcLayoutTests { |
| typ, argsize, retOffset, stack, gc, ptrs := FuncLayout(lt.t, lt.rcvr) |
| if typ.Size() != lt.size { |
| t.Errorf("funcLayout(%v, %v).size=%d, want %d", lt.t, lt.rcvr, typ.Size(), lt.size) |
| } |
| if argsize != lt.argsize { |
| t.Errorf("funcLayout(%v, %v).argsize=%d, want %d", lt.t, lt.rcvr, argsize, lt.argsize) |
| } |
| if retOffset != lt.retOffset { |
| t.Errorf("funcLayout(%v, %v).retOffset=%d, want %d", lt.t, lt.rcvr, retOffset, lt.retOffset) |
| } |
| if !bytes.Equal(stack, lt.stack) { |
| t.Errorf("funcLayout(%v, %v).stack=%v, want %v", lt.t, lt.rcvr, stack, lt.stack) |
| } |
| if !bytes.Equal(gc, lt.gc) { |
| t.Errorf("funcLayout(%v, %v).gc=%v, want %v", lt.t, lt.rcvr, gc, lt.gc) |
| } |
| if ptrs && len(stack) == 0 || !ptrs && len(stack) > 0 { |
| t.Errorf("funcLayout(%v, %v) pointers flag=%v, want %v", lt.t, lt.rcvr, ptrs, !ptrs) |
| } |
| } |
| } |
