| // Copyright 2012 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 os_test |
| |
| import ( |
| "errors" |
| "fmt" |
| "io/fs" |
| "os" |
| "path/filepath" |
| "testing" |
| ) |
| |
| func TestErrIsExist(t *testing.T) { |
| f, err := os.CreateTemp("", "_Go_ErrIsExist") |
| if err != nil { |
| t.Fatalf("open ErrIsExist tempfile: %s", err) |
| return |
| } |
| defer os.Remove(f.Name()) |
| defer f.Close() |
| f2, err := os.OpenFile(f.Name(), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600) |
| if err == nil { |
| f2.Close() |
| t.Fatal("Open should have failed") |
| return |
| } |
| if s := checkErrorPredicate("os.IsExist", os.IsExist, err, fs.ErrExist); s != "" { |
| t.Fatal(s) |
| return |
| } |
| } |
| |
| func testErrNotExist(name string) string { |
| f, err := os.Open(name) |
| if err == nil { |
| f.Close() |
| return "Open should have failed" |
| } |
| if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err, fs.ErrNotExist); s != "" { |
| return s |
| } |
| |
| err = os.Chdir(name) |
| if err == nil { |
| return "Chdir should have failed" |
| } |
| if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err, fs.ErrNotExist); s != "" { |
| return s |
| } |
| return "" |
| } |
| |
| func TestErrIsNotExist(t *testing.T) { |
| tmpDir, err := os.MkdirTemp("", "_Go_ErrIsNotExist") |
| if err != nil { |
| t.Fatalf("create ErrIsNotExist tempdir: %s", err) |
| return |
| } |
| defer os.RemoveAll(tmpDir) |
| |
| name := filepath.Join(tmpDir, "NotExists") |
| if s := testErrNotExist(name); s != "" { |
| t.Fatal(s) |
| return |
| } |
| |
| name = filepath.Join(name, "NotExists2") |
| if s := testErrNotExist(name); s != "" { |
| t.Fatal(s) |
| return |
| } |
| } |
| |
| func checkErrorPredicate(predName string, pred func(error) bool, err, target error) string { |
| if !pred(err) { |
| return fmt.Sprintf("%s does not work as expected for %#v", predName, err) |
| } |
| if !errors.Is(err, target) { |
| return fmt.Sprintf("errors.Is(%#v, %#v) = false, want true", err, target) |
| } |
| return "" |
| } |
| |
| type isExistTest struct { |
| err error |
| is bool |
| isnot bool |
| } |
| |
| var isExistTests = []isExistTest{ |
| {&fs.PathError{Err: fs.ErrInvalid}, false, false}, |
| {&fs.PathError{Err: fs.ErrPermission}, false, false}, |
| {&fs.PathError{Err: fs.ErrExist}, true, false}, |
| {&fs.PathError{Err: fs.ErrNotExist}, false, true}, |
| {&fs.PathError{Err: fs.ErrClosed}, false, false}, |
| {&os.LinkError{Err: fs.ErrInvalid}, false, false}, |
| {&os.LinkError{Err: fs.ErrPermission}, false, false}, |
| {&os.LinkError{Err: fs.ErrExist}, true, false}, |
| {&os.LinkError{Err: fs.ErrNotExist}, false, true}, |
| {&os.LinkError{Err: fs.ErrClosed}, false, false}, |
| {&os.SyscallError{Err: fs.ErrNotExist}, false, true}, |
| {&os.SyscallError{Err: fs.ErrExist}, true, false}, |
| {nil, false, false}, |
| } |
| |
| func TestIsExist(t *testing.T) { |
| for _, tt := range isExistTests { |
| if is := os.IsExist(tt.err); is != tt.is { |
| t.Errorf("os.IsExist(%T %v) = %v, want %v", tt.err, tt.err, is, tt.is) |
| } |
| if is := errors.Is(tt.err, fs.ErrExist); is != tt.is { |
| t.Errorf("errors.Is(%T %v, fs.ErrExist) = %v, want %v", tt.err, tt.err, is, tt.is) |
| } |
| if isnot := os.IsNotExist(tt.err); isnot != tt.isnot { |
| t.Errorf("os.IsNotExist(%T %v) = %v, want %v", tt.err, tt.err, isnot, tt.isnot) |
| } |
| if isnot := errors.Is(tt.err, fs.ErrNotExist); isnot != tt.isnot { |
| t.Errorf("errors.Is(%T %v, fs.ErrNotExist) = %v, want %v", tt.err, tt.err, isnot, tt.isnot) |
| } |
| } |
| } |
| |
| type isPermissionTest struct { |
| err error |
| want bool |
| } |
| |
| var isPermissionTests = []isPermissionTest{ |
| {nil, false}, |
| {&fs.PathError{Err: fs.ErrPermission}, true}, |
| {&os.SyscallError{Err: fs.ErrPermission}, true}, |
| } |
| |
| func TestIsPermission(t *testing.T) { |
| for _, tt := range isPermissionTests { |
| if got := os.IsPermission(tt.err); got != tt.want { |
| t.Errorf("os.IsPermission(%#v) = %v; want %v", tt.err, got, tt.want) |
| } |
| if got := errors.Is(tt.err, fs.ErrPermission); got != tt.want { |
| t.Errorf("errors.Is(%#v, fs.ErrPermission) = %v; want %v", tt.err, got, tt.want) |
| } |
| } |
| } |
| |
| func TestErrPathNUL(t *testing.T) { |
| f, err := os.CreateTemp("", "_Go_ErrPathNUL\x00") |
| if err == nil { |
| f.Close() |
| t.Fatal("TempFile should have failed") |
| } |
| f, err = os.CreateTemp("", "_Go_ErrPathNUL") |
| if err != nil { |
| t.Fatalf("open ErrPathNUL tempfile: %s", err) |
| } |
| defer os.Remove(f.Name()) |
| defer f.Close() |
| f2, err := os.OpenFile(f.Name(), os.O_RDWR, 0600) |
| if err != nil { |
| t.Fatalf("open ErrPathNUL: %s", err) |
| } |
| f2.Close() |
| f2, err = os.OpenFile(f.Name()+"\x00", os.O_RDWR, 0600) |
| if err == nil { |
| f2.Close() |
| t.Fatal("Open should have failed") |
| } |
| } |
| |
| func TestPathErrorUnwrap(t *testing.T) { |
| pe := &fs.PathError{Err: fs.ErrInvalid} |
| if !errors.Is(pe, fs.ErrInvalid) { |
| t.Error("errors.Is failed, wanted success") |
| } |
| } |
| |
| type myErrorIs struct{ error } |
| |
| func (e myErrorIs) Is(target error) bool { return target == e.error } |
| |
| func TestErrorIsMethods(t *testing.T) { |
| if os.IsPermission(myErrorIs{fs.ErrPermission}) { |
| t.Error("os.IsPermission(err) = true when err.Is(fs.ErrPermission), wanted false") |
| } |
| } |