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// 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 datafmt
import (
"fmt";
"datafmt";
"io";
"os";
"testing";
)
func parse(t *testing.T, form string, fmap FormatterMap) Format {
f, err := Parse(io.StringBytes(form), fmap);
if err != nil {
t.Errorf("Parse(%s): %v", form, err);
return nil;
}
return f;
}
func verify(t *testing.T, f Format, expected string, args ...) {
if f == nil {
return; // allow other tests to run
}
result := f.Sprint(args);
if result != expected {
t.Errorf(
"result : `%s`\nexpected: `%s`\n\n",
result, expected
)
}
}
func formatter(s *State, value interface{}, rule_name string) bool {
switch rule_name {
case "/":
fmt.Fprintf(s, "%d %d %d", s.Pos().Line, s.LinePos().Column, s.Pos().Column);
return true;
case "blank":
s.Write([]byte{' '});
return true;
case "int":
if value.(int) & 1 == 0 {
fmt.Fprint(s, "even ");
} else {
fmt.Fprint(s, "odd ");
}
return true;
case "nil":
return false;
case "testing.T":
s.Write(io.StringBytes("testing.T"));
return true;
}
panic("unreachable");
return false;
}
func TestCustomFormatters(t *testing.T) {
fmap0 := FormatterMap{ "/": formatter };
fmap1 := FormatterMap{ "int": formatter, "blank": formatter, "nil": formatter };
fmap2 := FormatterMap{ "testing.T": formatter };
f := parse(t, `int=`, fmap0);
verify(t, f, ``, 1, 2, 3);
f = parse(t, `int="#"`, nil);
verify(t, f, `###`, 1, 2, 3);
f = parse(t, `int="#";string="%s"`, fmap0);
verify(t, f, "#1 0 1#1 0 7#1 0 13\n2 0 0foo2 0 8\n", 1, 2, 3, "\n", "foo", "\n");
f = parse(t, ``, fmap1);
verify(t, f, `even odd even odd `, 0, 1, 2, 3);
f = parse(t, `/ =@:blank; float="#"`, fmap1);
verify(t, f, `# # #`, 0.0, 1.0, 2.0);
f = parse(t, `float=@:nil`, fmap1);
verify(t, f, ``, 0.0, 1.0, 2.0);
f = parse(t, `testing "testing"; ptr=*`, fmap2);
verify(t, f, `testing.T`, t);
// TODO needs more tests
}
// ----------------------------------------------------------------------------
// Formatting of basic and simple composite types
func check(t *testing.T, form, expected string, args ...) {
f := parse(t, form, nil);
if f == nil {
return; // allow other tests to run
}
result := f.Sprint(args);
if result != expected {
t.Errorf(
"format : %s\nresult : `%s`\nexpected: `%s`\n\n",
form, result, expected
)
}
}
func TestBasicTypes(t *testing.T) {
check(t, ``, ``);
check(t, `bool=":%v"`, `:true:false`, true, false);
check(t, `int="%b %d %o 0x%x"`, `101010 42 52 0x2a`, 42);
check(t, `int="%"`, `%`, 42);
check(t, `int="%%"`, `%`, 42);
check(t, `int="**%%**"`, `**%**`, 42);
check(t, `int="%%%%%%"`, `%%%`, 42);
check(t, `int="%%%d%%"`, `%42%`, 42);
const i = -42;
const is = `-42`;
check(t, `int ="%d"`, is, i);
check(t, `int8 ="%d"`, is, int8(i));
check(t, `int16="%d"`, is, int16(i));
check(t, `int32="%d"`, is, int32(i));
check(t, `int64="%d"`, is, int64(i));
const u = 42;
const us = `42`;
check(t, `uint ="%d"`, us, uint(u));
check(t, `uint8 ="%d"`, us, uint8(u));
check(t, `uint16="%d"`, us, uint16(u));
check(t, `uint32="%d"`, us, uint32(u));
check(t, `uint64="%d"`, us, uint64(u));
const f = 3.141592;
const fs = `3.141592`;
check(t, `float ="%g"`, fs, f);
check(t, `float32="%g"`, fs, float32(f));
check(t, `float64="%g"`, fs, float64(f));
}
func TestArrayTypes(t *testing.T) {
var a0 [10]int;
check(t, `array="array";`, `array`, a0);
a1 := [...]int{1, 2, 3};
check(t, `array="array";`, `array`, a1);
check(t, `array={*}; int="%d";`, `123`, a1);
check(t, `array={* / ", "}; int="%d";`, `1, 2, 3`, a1);
check(t, `array={* / *}; int="%d";`, `12233`, a1);
a2 := []interface{}{42, "foo", 3.14};
check(t, `array={* / ", "}; interface=*; string="bar"; default="%v";`, `42, bar, 3.14`, a2);
}
func TestChanTypes(t *testing.T) {
var c0 chan int;
check(t, `chan="chan"`, `chan`, c0);
c1 := make(chan int);
go func(){ c1 <- 42 }();
check(t, `chan="chan"`, `chan`, c1);
// check(t, `chan=*`, `42`, c1); // reflection support for chans incomplete
}
func TestFuncTypes(t *testing.T) {
var f0 func() int;
check(t, `func="func"`, `func`, f0);
f1 := func() int { return 42; };
check(t, `func="func"`, `func`, f1);
// check(t, `func=*`, `42`, f1); // reflection support for funcs incomplete
}
func TestInterfaceTypes(t *testing.T) {
var i0 interface{};
check(t, `interface="interface"`, `interface`, i0);
i0 = "foo";
check(t, `interface="interface"`, `interface`, i0);
check(t, `interface=*; string="%s"`, `foo`, i0);
}
func TestMapTypes(t *testing.T) {
var m0 map[string]int;
check(t, `map="map"`, `map`, m0);
m1 := map[string]int{};
check(t, `map="map"`, `map`, m1);
// check(t, `map=*`, ``, m1); // reflection support for maps incomplete
}
func TestPointerTypes(t *testing.T) {
var p0 *int;
check(t, `ptr="ptr"`, `ptr`, p0);
check(t, `ptr=*`, ``, p0);
check(t, `ptr=*|"nil"`, `nil`, p0);
x := 99991;
p1 := &x;
check(t, `ptr="ptr"`, `ptr`, p1);
check(t, `ptr=*; int="%d"`, `99991`, p1);
}
func TestDefaultRule(t *testing.T) {
check(t, `default="%v"`, `42foo3.14`, 42, "foo", 3.14);
check(t, `default="%v"; int="%x"`, `abcdef`, 10, 11, 12, 13, 14, 15);
check(t, `default="%v"; int="%x"`, `ab**ef`, 10, 11, "**", 14, 15);
check(t, `default="%x"; int=@:default`, `abcdef`, 10, 11, 12, 13, 14, 15);
}
func TestGlobalSeparatorRule(t *testing.T) {
check(t, `int="%d"; / ="-"`, `1-2-3-4`, 1, 2, 3, 4);
check(t, `int="%x%x"; / ="*"`, `aa*aa`, 10, 10);
}
// ----------------------------------------------------------------------------
// Formatting of a struct
type T1 struct {
a int;
}
const F1 =
`datafmt "datafmt";`
`int = "%d";`
`datafmt.T1 = "<" a ">";`
func TestStruct1(t *testing.T) {
check(t, F1, "<42>", T1{42});
}
// ----------------------------------------------------------------------------
// Formatting of a struct with an optional field (ptr)
type T2 struct {
s string;
p *T1;
}
const F2a =
F1 +
`string = "%s";`
`ptr = *;`
`datafmt.T2 = s ["-" p "-"];`
const F2b =
F1 +
`string = "%s";`
`ptr = *;`
`datafmt.T2 = s ("-" p "-" | "empty");`;
func TestStruct2(t *testing.T) {
check(t, F2a, "foo", T2{"foo", nil});
check(t, F2a, "bar-<17>-", T2{"bar", &T1{17}});
check(t, F2b, "fooempty", T2{"foo", nil});
}
// ----------------------------------------------------------------------------
// Formatting of a struct with a repetitive field (slice)
type T3 struct {
s string;
a []int;
}
const F3a =
`datafmt "datafmt";`
`default = "%v";`
`array = *;`
`datafmt.T3 = s {" " a a / ","};`
const F3b =
`datafmt "datafmt";`
`int = "%d";`
`string = "%s";`
`array = *;`
`nil = ;`
`empty = *:nil;`
`datafmt.T3 = s [a:empty ": " {a / "-"}]`
func TestStruct3(t *testing.T) {
check(t, F3a, "foo", T3{"foo", nil});
check(t, F3a, "foo 00, 11, 22", T3{"foo", []int{0, 1, 2}});
check(t, F3b, "bar", T3{"bar", nil});
check(t, F3b, "bal: 2-3-5", T3{"bal", []int{2, 3, 5}});
}
// ----------------------------------------------------------------------------
// Formatting of a struct with alternative field
type T4 struct {
x *int;
a []int;
}
const F4a =
`datafmt "datafmt";`
`int = "%d";`
`ptr = *;`
`array = *;`
`nil = ;`
`empty = *:nil;`
`datafmt.T4 = "<" (x:empty x | "-") ">" `
const F4b =
`datafmt "datafmt";`
`int = "%d";`
`ptr = *;`
`array = *;`
`nil = ;`
`empty = *:nil;`
`datafmt.T4 = "<" (a:empty {a / ", "} | "-") ">" `
func TestStruct4(t *testing.T) {
x := 7;
check(t, F4a, "<->", T4{nil, nil});
check(t, F4a, "<7>", T4{&x, nil});
check(t, F4b, "<->", T4{nil, nil});
check(t, F4b, "<2, 3, 7>", T4{nil, []int{2, 3, 7}});
}
// ----------------------------------------------------------------------------
// Formatting a struct (documentation example)
type Point struct {
name string;
x, y int;
}
const FPoint =
`datafmt "datafmt";`
`int = "%d";`
`hexInt = "0x%x";`
`string = "---%s---";`
`datafmt.Point = name "{" x ", " y:hexInt "}";`
func TestStructPoint(t *testing.T) {
p := Point{"foo", 3, 15};
check(t, FPoint, "---foo---{3, 0xf}", p);
}
// ----------------------------------------------------------------------------
// Formatting a slice (documentation example)
const FSlice =
`int = "%b";`
`array = { * / ", " }`
func TestSlice(t *testing.T) {
check(t, FSlice, "10, 11, 101, 111", []int{2, 3, 5, 7});
}
// TODO add more tests