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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 (
"fmt"
"internal/syscall/windows"
"internal/testenv"
"os"
"path/filepath"
"strings"
"syscall"
"testing"
)
func TestFixLongPath(t *testing.T) {
if os.CanUseLongPaths {
return
}
t.Parallel()
// 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) {
t.Parallel()
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) {
t.Parallel()
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) {
t.Parallel()
tests := []string{
`/`,
`\`,
}
for _, test := range tests {
dir, err := os.Open(test)
if err != nil {
t.Fatalf("Open(%q) failed: %v", test, err)
}
dir.Close()
}
}
func testMkdirAllAtRoot(t *testing.T, root string) {
// Create a unique-enough directory name in root.
base := fmt.Sprintf("%s-%d", t.Name(), os.Getpid())
path := filepath.Join(root, base)
if err := os.MkdirAll(path, 0777); err != nil {
t.Fatalf("MkdirAll(%q) failed: %v", path, err)
}
// Clean up
if err := os.RemoveAll(path); err != nil {
t.Fatal(err)
}
}
func TestMkdirAllExtendedLengthAtRoot(t *testing.T) {
if testenv.Builder() == "" {
t.Skipf("skipping non-hermetic test outside of Go builders")
}
const prefix = `\\?\`
vol := filepath.VolumeName(t.TempDir()) + `\`
if len(vol) < 4 || vol[:4] != prefix {
vol = prefix + vol
}
testMkdirAllAtRoot(t, vol)
}
func TestMkdirAllVolumeNameAtRoot(t *testing.T) {
if testenv.Builder() == "" {
t.Skipf("skipping non-hermetic test outside of Go builders")
}
vol, err := syscall.UTF16PtrFromString(filepath.VolumeName(t.TempDir()) + `\`)
if err != nil {
t.Fatal(err)
}
const maxVolNameLen = 50
var buf [maxVolNameLen]uint16
err = windows.GetVolumeNameForVolumeMountPoint(vol, &buf[0], maxVolNameLen)
if err != nil {
t.Fatal(err)
}
volName := syscall.UTF16ToString(buf[:])
testMkdirAllAtRoot(t, volName)
}
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