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- // Copyright 2016 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 (
- "os"
- "strings"
- "syscall"
- "testing"
- )
- func TestFixLongPath(t *testing.T) {
- if os.CanUseLongPaths {
- return
- }
- // 248 is long enough to trigger the longer-than-248 checks in
- // fixLongPath, but short enough not to make a path component
- // longer than 255, which is illegal on Windows. (which
- // doesn't really matter anyway, since this is purely a string
- // function we're testing, and it's not actually being used to
- // do a system call)
- veryLong := "l" + strings.Repeat("o", 248) + "ng"
- for _, test := range []struct{ in, want string }{
- // Short; unchanged:
- {`C:\short.txt`, `C:\short.txt`},
- {`C:\`, `C:\`},
- {`C:`, `C:`},
- // The "long" substring is replaced by a looooooong
- // string which triggers the rewriting. Except in the
- // cases below where it doesn't.
- {`C:\long\foo.txt`, `\\?\C:\long\foo.txt`},
- {`C:/long/foo.txt`, `\\?\C:\long\foo.txt`},
- {`C:\long\foo\\bar\.\baz\\`, `\\?\C:\long\foo\bar\baz`},
- {`\\unc\path`, `\\unc\path`},
- {`long.txt`, `long.txt`},
- {`C:long.txt`, `C:long.txt`},
- {`c:\long\..\bar\baz`, `c:\long\..\bar\baz`},
- {`\\?\c:\long\foo.txt`, `\\?\c:\long\foo.txt`},
- {`\\?\c:\long/foo.txt`, `\\?\c:\long/foo.txt`},
- } {
- in := strings.ReplaceAll(test.in, "long", veryLong)
- want := strings.ReplaceAll(test.want, "long", veryLong)
- if got := os.FixLongPath(in); got != want {
- got = strings.ReplaceAll(got, veryLong, "long")
- t.Errorf("fixLongPath(%q) = %q; want %q", test.in, got, test.want)
- }
- }
- }
- func TestMkdirAllLongPath(t *testing.T) {
- tmpDir := t.TempDir()
- path := tmpDir
- for i := 0; i < 100; i++ {
- path += `\another-path-component`
- }
- if err := os.MkdirAll(path, 0777); err != nil {
- t.Fatalf("MkdirAll(%q) failed; %v", path, err)
- }
- if err := os.RemoveAll(tmpDir); err != nil {
- t.Fatalf("RemoveAll(%q) failed; %v", tmpDir, err)
- }
- }
- func TestMkdirAllExtendedLength(t *testing.T) {
- tmpDir := t.TempDir()
- const prefix = `\\?\`
- if len(tmpDir) < 4 || tmpDir[:4] != prefix {
- fullPath, err := syscall.FullPath(tmpDir)
- if err != nil {
- t.Fatalf("FullPath(%q) fails: %v", tmpDir, err)
- }
- tmpDir = prefix + fullPath
- }
- path := tmpDir + `\dir\`
- if err := os.MkdirAll(path, 0777); err != nil {
- t.Fatalf("MkdirAll(%q) failed: %v", path, err)
- }
- path = path + `.\dir2`
- if err := os.MkdirAll(path, 0777); err == nil {
- t.Fatalf("MkdirAll(%q) should have failed, but did not", path)
- }
- }
- func TestOpenRootSlash(t *testing.T) {
- tests := []string{
- `/`,
- `\`,
- }
- for _, test := range tests {
- dir, err := os.Open(test)
- if err != nil {
- t.Fatalf("Open(%q) failed: %v", test, err)
- }
- dir.Close()
- }
- }
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