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path_test.go
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path_test.go
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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 filepath_test
import (
"errors"
"fmt"
"internal/testenv"
"io/fs"
"os"
"path/filepath"
"reflect"
"runtime"
"slices"
"sort"
"strings"
"syscall"
"testing"
)
type PathTest struct {
path, result string
}
var cleantests = []PathTest{
// Already clean
{"abc", "abc"},
{"abc/def", "abc/def"},
{"a/b/c", "a/b/c"},
{".", "."},
{"..", ".."},
{"../..", "../.."},
{"../../abc", "../../abc"},
{"/abc", "/abc"},
{"/", "/"},
// Empty is current dir
{"", "."},
// Remove trailing slash
{"abc/", "abc"},
{"abc/def/", "abc/def"},
{"a/b/c/", "a/b/c"},
{"./", "."},
{"../", ".."},
{"../../", "../.."},
{"/abc/", "/abc"},
// Remove doubled slash
{"abc//def//ghi", "abc/def/ghi"},
{"abc//", "abc"},
// Remove . elements
{"abc/./def", "abc/def"},
{"/./abc/def", "/abc/def"},
{"abc/.", "abc"},
// Remove .. elements
{"abc/def/ghi/../jkl", "abc/def/jkl"},
{"abc/def/../ghi/../jkl", "abc/jkl"},
{"abc/def/..", "abc"},
{"abc/def/../..", "."},
{"/abc/def/../..", "/"},
{"abc/def/../../..", ".."},
{"/abc/def/../../..", "/"},
{"abc/def/../../../ghi/jkl/../../../mno", "../../mno"},
{"/../abc", "/abc"},
// Combinations
{"abc/./../def", "def"},
{"abc//./../def", "def"},
{"abc/../../././../def", "../../def"},
}
var nonwincleantests = []PathTest{
// Remove leading doubled slash
{"//abc", "/abc"},
{"///abc", "/abc"},
{"//abc//", "/abc"},
}
var wincleantests = []PathTest{
{`c:`, `c:.`},
{`c:\`, `c:\`},
{`c:\abc`, `c:\abc`},
{`c:abc\..\..\.\.\..\def`, `c:..\..\def`},
{`c:\abc\def\..\..`, `c:\`},
{`c:\..\abc`, `c:\abc`},
{`c:..\abc`, `c:..\abc`},
{`\`, `\`},
{`/`, `\`},
{`\\i\..\c$`, `\\i\..\c$`},
{`\\i\..\i\c$`, `\\i\..\i\c$`},
{`\\i\..\I\c$`, `\\i\..\I\c$`},
{`\\host\share\foo\..\bar`, `\\host\share\bar`},
{`//host/share/foo/../baz`, `\\host\share\baz`},
{`\\host\share\foo\..\..\..\..\bar`, `\\host\share\bar`},
{`\\.\C:\a\..\..\..\..\bar`, `\\.\C:\bar`},
{`\\.\C:\\\\a`, `\\.\C:\a`},
{`\\a\b\..\c`, `\\a\b\c`},
{`\\a\b`, `\\a\b`},
{`.\c:`, `.\c:`},
{`.\c:\foo`, `.\c:\foo`},
{`.\c:foo`, `.\c:foo`},
{`//abc`, `\\abc`},
{`///abc`, `\\\abc`},
{`//abc//`, `\\abc\\`},
// Don't allow cleaning to move an element with a colon to the start of the path.
{`a/../c:`, `.\c:`},
{`a\..\c:`, `.\c:`},
{`a/../c:/a`, `.\c:\a`},
{`a/../../c:`, `..\c:`},
{`foo:bar`, `foo:bar`},
}
func TestClean(t *testing.T) {
tests := cleantests
if runtime.GOOS == "windows" {
for i := range tests {
tests[i].result = filepath.FromSlash(tests[i].result)
}
tests = append(tests, wincleantests...)
} else {
tests = append(tests, nonwincleantests...)
}
for _, test := range tests {
if s := filepath.Clean(test.path); s != test.result {
t.Errorf("Clean(%q) = %q, want %q", test.path, s, test.result)
}
if s := filepath.Clean(test.result); s != test.result {
t.Errorf("Clean(%q) = %q, want %q", test.result, s, test.result)
}
}
if testing.Short() {
t.Skip("skipping malloc count in short mode")
}
if runtime.GOMAXPROCS(0) > 1 {
t.Log("skipping AllocsPerRun checks; GOMAXPROCS>1")
return
}
for _, test := range tests {
allocs := testing.AllocsPerRun(100, func() { filepath.Clean(test.result) })
if allocs > 0 {
t.Errorf("Clean(%q): %v allocs, want zero", test.result, allocs)
}
}
}
type IsLocalTest struct {
path string
isLocal bool
}
var islocaltests = []IsLocalTest{
{"", false},
{".", true},
{"..", false},
{"../a", false},
{"/", false},
{"/a", false},
{"/a/../..", false},
{"a", true},
{"a/../a", true},
{"a/", true},
{"a/.", true},
{"a/./b/./c", true},
}
var winislocaltests = []IsLocalTest{
{"NUL", false},
{"nul", false},
{"nul.", false},
{"com1", false},
{"./nul", false},
{`\`, false},
{`\a`, false},
{`C:`, false},
{`C:\a`, false},
{`..\a`, false},
{`a/../c:`, false},
{`CONIN$`, false},
{`conin$`, false},
{`CONOUT$`, false},
{`conout$`, false},
{`dollar$`, true}, // not a special file name
}
var plan9islocaltests = []IsLocalTest{
{"#a", false},
}
func TestIsLocal(t *testing.T) {
tests := islocaltests
if runtime.GOOS == "windows" {
tests = append(tests, winislocaltests...)
}
if runtime.GOOS == "plan9" {
tests = append(tests, plan9islocaltests...)
}
for _, test := range tests {
if got := filepath.IsLocal(test.path); got != test.isLocal {
t.Errorf("IsLocal(%q) = %v, want %v", test.path, got, test.isLocal)
}
}
}
const sep = filepath.Separator
var slashtests = []PathTest{
{"", ""},
{"/", string(sep)},
{"/a/b", string([]byte{sep, 'a', sep, 'b'})},
{"a//b", string([]byte{'a', sep, sep, 'b'})},
}
func TestFromAndToSlash(t *testing.T) {
for _, test := range slashtests {
if s := filepath.FromSlash(test.path); s != test.result {
t.Errorf("FromSlash(%q) = %q, want %q", test.path, s, test.result)
}
if s := filepath.ToSlash(test.result); s != test.path {
t.Errorf("ToSlash(%q) = %q, want %q", test.result, s, test.path)
}
}
}
type SplitListTest struct {
list string
result []string
}
const lsep = filepath.ListSeparator
var splitlisttests = []SplitListTest{
{"", []string{}},
{string([]byte{'a', lsep, 'b'}), []string{"a", "b"}},
{string([]byte{lsep, 'a', lsep, 'b'}), []string{"", "a", "b"}},
}
var winsplitlisttests = []SplitListTest{
// quoted
{`"a"`, []string{`a`}},
// semicolon
{`";"`, []string{`;`}},
{`"a;b"`, []string{`a;b`}},
{`";";`, []string{`;`, ``}},
{`;";"`, []string{``, `;`}},
// partially quoted
{`a";"b`, []string{`a;b`}},
{`a; ""b`, []string{`a`, ` b`}},
{`"a;b`, []string{`a;b`}},
{`""a;b`, []string{`a`, `b`}},
{`"""a;b`, []string{`a;b`}},
{`""""a;b`, []string{`a`, `b`}},
{`a";b`, []string{`a;b`}},
{`a;b";c`, []string{`a`, `b;c`}},
{`"a";b";c`, []string{`a`, `b;c`}},
}
func TestSplitList(t *testing.T) {
tests := splitlisttests
if runtime.GOOS == "windows" {
tests = append(tests, winsplitlisttests...)
}
for _, test := range tests {
if l := filepath.SplitList(test.list); !reflect.DeepEqual(l, test.result) {
t.Errorf("SplitList(%#q) = %#q, want %#q", test.list, l, test.result)
}
}
}
type SplitTest struct {
path, dir, file string
}
var unixsplittests = []SplitTest{
{"a/b", "a/", "b"},
{"a/b/", "a/b/", ""},
{"a/", "a/", ""},
{"a", "", "a"},
{"/", "/", ""},
}
var winsplittests = []SplitTest{
{`c:`, `c:`, ``},
{`c:/`, `c:/`, ``},
{`c:/foo`, `c:/`, `foo`},
{`c:/foo/bar`, `c:/foo/`, `bar`},
{`//host/share`, `//host/share`, ``},
{`//host/share/`, `//host/share/`, ``},
{`//host/share/foo`, `//host/share/`, `foo`},
{`\\host\share`, `\\host\share`, ``},
{`\\host\share\`, `\\host\share\`, ``},
{`\\host\share\foo`, `\\host\share\`, `foo`},
}
func TestSplit(t *testing.T) {
var splittests []SplitTest
splittests = unixsplittests
if runtime.GOOS == "windows" {
splittests = append(splittests, winsplittests...)
}
for _, test := range splittests {
if d, f := filepath.Split(test.path); d != test.dir || f != test.file {
t.Errorf("Split(%q) = %q, %q, want %q, %q", test.path, d, f, test.dir, test.file)
}
}
}
type JoinTest struct {
elem []string
path string
}
var jointests = []JoinTest{
// zero parameters
{[]string{}, ""},
// one parameter
{[]string{""}, ""},
{[]string{"/"}, "/"},
{[]string{"a"}, "a"},
// two parameters
{[]string{"a", "b"}, "a/b"},
{[]string{"a", ""}, "a"},
{[]string{"", "b"}, "b"},
{[]string{"/", "a"}, "/a"},
{[]string{"/", "a/b"}, "/a/b"},
{[]string{"/", ""}, "/"},
{[]string{"/a", "b"}, "/a/b"},
{[]string{"a", "/b"}, "a/b"},
{[]string{"/a", "/b"}, "/a/b"},
{[]string{"a/", "b"}, "a/b"},
{[]string{"a/", ""}, "a"},
{[]string{"", ""}, ""},
// three parameters
{[]string{"/", "a", "b"}, "/a/b"},
}
var nonwinjointests = []JoinTest{
{[]string{"//", "a"}, "/a"},
}
var winjointests = []JoinTest{
{[]string{`directory`, `file`}, `directory\file`},
{[]string{`C:\Windows\`, `System32`}, `C:\Windows\System32`},
{[]string{`C:\Windows\`, ``}, `C:\Windows`},
{[]string{`C:\`, `Windows`}, `C:\Windows`},
{[]string{`C:`, `a`}, `C:a`},
{[]string{`C:`, `a\b`}, `C:a\b`},
{[]string{`C:`, `a`, `b`}, `C:a\b`},
{[]string{`C:`, ``, `b`}, `C:b`},
{[]string{`C:`, ``, ``, `b`}, `C:b`},
{[]string{`C:`, ``}, `C:.`},
{[]string{`C:`, ``, ``}, `C:.`},
{[]string{`C:`, `\a`}, `C:\a`},
{[]string{`C:`, ``, `\a`}, `C:\a`},
{[]string{`C:.`, `a`}, `C:a`},
{[]string{`C:a`, `b`}, `C:a\b`},
{[]string{`C:a`, `b`, `d`}, `C:a\b\d`},
{[]string{`\\host\share`, `foo`}, `\\host\share\foo`},
{[]string{`\\host\share\foo`}, `\\host\share\foo`},
{[]string{`//host/share`, `foo/bar`}, `\\host\share\foo\bar`},
{[]string{`\`}, `\`},
{[]string{`\`, ``}, `\`},
{[]string{`\`, `a`}, `\a`},
{[]string{`\\`, `a`}, `\\a`},
{[]string{`\`, `a`, `b`}, `\a\b`},
{[]string{`\\`, `a`, `b`}, `\\a\b`},
{[]string{`\`, `\\a\b`, `c`}, `\a\b\c`},
{[]string{`\\a`, `b`, `c`}, `\\a\b\c`},
{[]string{`\\a\`, `b`, `c`}, `\\a\b\c`},
{[]string{`//`, `a`}, `\\a`},
}
func TestJoin(t *testing.T) {
if runtime.GOOS == "windows" {
jointests = append(jointests, winjointests...)
} else {
jointests = append(jointests, nonwinjointests...)
}
for _, test := range jointests {
expected := filepath.FromSlash(test.path)
if p := filepath.Join(test.elem...); p != expected {
t.Errorf("join(%q) = %q, want %q", test.elem, p, expected)
}
}
}
type ExtTest struct {
path, ext string
}
var exttests = []ExtTest{
{"path.go", ".go"},
{"path.pb.go", ".go"},
{"a.dir/b", ""},
{"a.dir/b.go", ".go"},
{"a.dir/", ""},
}
func TestExt(t *testing.T) {
for _, test := range exttests {
if x := filepath.Ext(test.path); x != test.ext {
t.Errorf("Ext(%q) = %q, want %q", test.path, x, test.ext)
}
}
}
type Node struct {
name string
entries []*Node // nil if the entry is a file
mark int
}
var tree = &Node{
"testdata",
[]*Node{
{"a", nil, 0},
{"b", []*Node{}, 0},
{"c", nil, 0},
{
"d",
[]*Node{
{"x", nil, 0},
{"y", []*Node{}, 0},
{
"z",
[]*Node{
{"u", nil, 0},
{"v", nil, 0},
},
0,
},
},
0,
},
},
0,
}
func walkTree(n *Node, path string, f func(path string, n *Node)) {
f(path, n)
for _, e := range n.entries {
walkTree(e, filepath.Join(path, e.name), f)
}
}
func makeTree(t *testing.T) {
walkTree(tree, tree.name, func(path string, n *Node) {
if n.entries == nil {
fd, err := os.Create(path)
if err != nil {
t.Errorf("makeTree: %v", err)
return
}
fd.Close()
} else {
os.Mkdir(path, 0770)
}
})
}
func markTree(n *Node) { walkTree(n, "", func(path string, n *Node) { n.mark++ }) }
func checkMarks(t *testing.T, report bool) {
walkTree(tree, tree.name, func(path string, n *Node) {
if n.mark != 1 && report {
t.Errorf("node %s mark = %d; expected 1", path, n.mark)
}
n.mark = 0
})
}
// Assumes that each node name is unique. Good enough for a test.
// If clear is true, any incoming error is cleared before return. The errors
// are always accumulated, though.
func mark(d fs.DirEntry, err error, errors *[]error, clear bool) error {
name := d.Name()
walkTree(tree, tree.name, func(path string, n *Node) {
if n.name == name {
n.mark++
}
})
if err != nil {
*errors = append(*errors, err)
if clear {
return nil
}
return err
}
return nil
}
// chdir changes the current working directory to the named directory,
// and then restore the original working directory at the end of the test.
func chdir(t *testing.T, dir string) {
olddir, err := os.Getwd()
if err != nil {
t.Fatalf("getwd %s: %v", dir, err)
}
if err := os.Chdir(dir); err != nil {
t.Fatalf("chdir %s: %v", dir, err)
}
t.Cleanup(func() {
if err := os.Chdir(olddir); err != nil {
t.Errorf("restore original working directory %s: %v", olddir, err)
os.Exit(1)
}
})
}
func chtmpdir(t *testing.T) (restore func()) {
oldwd, err := os.Getwd()
if err != nil {
t.Fatalf("chtmpdir: %v", err)
}
d, err := os.MkdirTemp("", "test")
if err != nil {
t.Fatalf("chtmpdir: %v", err)
}
if err := os.Chdir(d); err != nil {
t.Fatalf("chtmpdir: %v", err)
}
return func() {
if err := os.Chdir(oldwd); err != nil {
t.Fatalf("chtmpdir: %v", err)
}
os.RemoveAll(d)
}
}
// tempDirCanonical returns a temporary directory for the test to use, ensuring
// that the returned path does not contain symlinks.
func tempDirCanonical(t *testing.T) string {
dir := t.TempDir()
cdir, err := filepath.EvalSymlinks(dir)
if err != nil {
t.Errorf("tempDirCanonical: %v", err)
}
return cdir
}
func TestWalk(t *testing.T) {
walk := func(root string, fn fs.WalkDirFunc) error {
return filepath.Walk(root, func(path string, info fs.FileInfo, err error) error {
return fn(path, &statDirEntry{info}, err)
})
}
testWalk(t, walk, 1)
}
type statDirEntry struct {
info fs.FileInfo
}
func (d *statDirEntry) Name() string { return d.info.Name() }
func (d *statDirEntry) IsDir() bool { return d.info.IsDir() }
func (d *statDirEntry) Type() fs.FileMode { return d.info.Mode().Type() }
func (d *statDirEntry) Info() (fs.FileInfo, error) { return d.info, nil }
func (d *statDirEntry) String() string {
return fs.FormatDirEntry(d)
}
func TestWalkDir(t *testing.T) {
testWalk(t, filepath.WalkDir, 2)
}
func testWalk(t *testing.T, walk func(string, fs.WalkDirFunc) error, errVisit int) {
if runtime.GOOS == "ios" {
restore := chtmpdir(t)
defer restore()
}
tmpDir := t.TempDir()
origDir, err := os.Getwd()
if err != nil {
t.Fatal("finding working dir:", err)
}
if err = os.Chdir(tmpDir); err != nil {
t.Fatal("entering temp dir:", err)
}
defer os.Chdir(origDir)
makeTree(t)
errors := make([]error, 0, 10)
clear := true
markFn := func(path string, d fs.DirEntry, err error) error {
return mark(d, err, &errors, clear)
}
// Expect no errors.
err = walk(tree.name, markFn)
if err != nil {
t.Fatalf("no error expected, found: %s", err)
}
if len(errors) != 0 {
t.Fatalf("unexpected errors: %s", errors)
}
checkMarks(t, true)
errors = errors[0:0]
t.Run("PermErr", func(t *testing.T) {
// Test permission errors. Only possible if we're not root
// and only on some file systems (AFS, FAT). To avoid errors during
// all.bash on those file systems, skip during go test -short.
// Chmod is not supported on wasip1.
if runtime.GOOS == "windows" || runtime.GOOS == "wasip1" {
t.Skip("skipping on " + runtime.GOOS)
}
if os.Getuid() == 0 {
t.Skip("skipping as root")
}
if testing.Short() {
t.Skip("skipping in short mode")
}
// introduce 2 errors: chmod top-level directories to 0
os.Chmod(filepath.Join(tree.name, tree.entries[1].name), 0)
os.Chmod(filepath.Join(tree.name, tree.entries[3].name), 0)
// 3) capture errors, expect two.
// mark respective subtrees manually
markTree(tree.entries[1])
markTree(tree.entries[3])
// correct double-marking of directory itself
tree.entries[1].mark -= errVisit
tree.entries[3].mark -= errVisit
err := walk(tree.name, markFn)
if err != nil {
t.Fatalf("expected no error return from Walk, got %s", err)
}
if len(errors) != 2 {
t.Errorf("expected 2 errors, got %d: %s", len(errors), errors)
}
// the inaccessible subtrees were marked manually
checkMarks(t, true)
errors = errors[0:0]
// 4) capture errors, stop after first error.
// mark respective subtrees manually
markTree(tree.entries[1])
markTree(tree.entries[3])
// correct double-marking of directory itself
tree.entries[1].mark -= errVisit
tree.entries[3].mark -= errVisit
clear = false // error will stop processing
err = walk(tree.name, markFn)
if err == nil {
t.Fatalf("expected error return from Walk")
}
if len(errors) != 1 {
t.Errorf("expected 1 error, got %d: %s", len(errors), errors)
}
// the inaccessible subtrees were marked manually
checkMarks(t, false)
errors = errors[0:0]
// restore permissions
os.Chmod(filepath.Join(tree.name, tree.entries[1].name), 0770)
os.Chmod(filepath.Join(tree.name, tree.entries[3].name), 0770)
})
}
func touch(t *testing.T, name string) {
f, err := os.Create(name)
if err != nil {
t.Fatal(err)
}
if err := f.Close(); err != nil {
t.Fatal(err)
}
}
func TestWalkSkipDirOnFile(t *testing.T) {
td := t.TempDir()
if err := os.MkdirAll(filepath.Join(td, "dir"), 0755); err != nil {
t.Fatal(err)
}
touch(t, filepath.Join(td, "dir/foo1"))
touch(t, filepath.Join(td, "dir/foo2"))
sawFoo2 := false
walker := func(path string) error {
if strings.HasSuffix(path, "foo2") {
sawFoo2 = true
}
if strings.HasSuffix(path, "foo1") {
return filepath.SkipDir
}
return nil
}
walkFn := func(path string, _ fs.FileInfo, _ error) error { return walker(path) }
walkDirFn := func(path string, _ fs.DirEntry, _ error) error { return walker(path) }
check := func(t *testing.T, walk func(root string) error, root string) {
t.Helper()
sawFoo2 = false
err := walk(root)
if err != nil {
t.Fatal(err)
}
if sawFoo2 {
t.Errorf("SkipDir on file foo1 did not block processing of foo2")
}
}
t.Run("Walk", func(t *testing.T) {
Walk := func(root string) error { return filepath.Walk(td, walkFn) }
check(t, Walk, td)
check(t, Walk, filepath.Join(td, "dir"))
})
t.Run("WalkDir", func(t *testing.T) {
WalkDir := func(root string) error { return filepath.WalkDir(td, walkDirFn) }
check(t, WalkDir, td)
check(t, WalkDir, filepath.Join(td, "dir"))
})
}
func TestWalkSkipAllOnFile(t *testing.T) {
td := t.TempDir()
if err := os.MkdirAll(filepath.Join(td, "dir", "subdir"), 0755); err != nil {
t.Fatal(err)
}
if err := os.MkdirAll(filepath.Join(td, "dir2"), 0755); err != nil {
t.Fatal(err)
}
touch(t, filepath.Join(td, "dir", "foo1"))
touch(t, filepath.Join(td, "dir", "foo2"))
touch(t, filepath.Join(td, "dir", "subdir", "foo3"))
touch(t, filepath.Join(td, "dir", "foo4"))
touch(t, filepath.Join(td, "dir2", "bar"))
touch(t, filepath.Join(td, "last"))
remainingWereSkipped := true
walker := func(path string) error {
if strings.HasSuffix(path, "foo2") {
return filepath.SkipAll
}
if strings.HasSuffix(path, "foo3") ||
strings.HasSuffix(path, "foo4") ||
strings.HasSuffix(path, "bar") ||
strings.HasSuffix(path, "last") {
remainingWereSkipped = false
}
return nil
}
walkFn := func(path string, _ fs.FileInfo, _ error) error { return walker(path) }
walkDirFn := func(path string, _ fs.DirEntry, _ error) error { return walker(path) }
check := func(t *testing.T, walk func(root string) error, root string) {
t.Helper()
remainingWereSkipped = true
if err := walk(root); err != nil {
t.Fatal(err)
}
if !remainingWereSkipped {
t.Errorf("SkipAll on file foo2 did not block processing of remaining files and directories")
}
}
t.Run("Walk", func(t *testing.T) {
Walk := func(_ string) error { return filepath.Walk(td, walkFn) }
check(t, Walk, td)
check(t, Walk, filepath.Join(td, "dir"))
})
t.Run("WalkDir", func(t *testing.T) {
WalkDir := func(_ string) error { return filepath.WalkDir(td, walkDirFn) }
check(t, WalkDir, td)
check(t, WalkDir, filepath.Join(td, "dir"))
})
}
func TestWalkFileError(t *testing.T) {
td := t.TempDir()
touch(t, filepath.Join(td, "foo"))
touch(t, filepath.Join(td, "bar"))
dir := filepath.Join(td, "dir")
if err := os.MkdirAll(filepath.Join(td, "dir"), 0755); err != nil {
t.Fatal(err)
}
touch(t, filepath.Join(dir, "baz"))
touch(t, filepath.Join(dir, "stat-error"))
defer func() {
*filepath.LstatP = os.Lstat
}()
statErr := errors.New("some stat error")
*filepath.LstatP = func(path string) (fs.FileInfo, error) {
if strings.HasSuffix(path, "stat-error") {
return nil, statErr
}
return os.Lstat(path)
}
got := map[string]error{}
err := filepath.Walk(td, func(path string, fi fs.FileInfo, err error) error {
rel, _ := filepath.Rel(td, path)
got[filepath.ToSlash(rel)] = err
return nil
})
if err != nil {
t.Errorf("Walk error: %v", err)
}
want := map[string]error{
".": nil,
"foo": nil,
"bar": nil,
"dir": nil,
"dir/baz": nil,
"dir/stat-error": statErr,
}
if !reflect.DeepEqual(got, want) {
t.Errorf("Walked %#v; want %#v", got, want)
}
}
func TestWalkSymlinkRoot(t *testing.T) {
testenv.MustHaveSymlink(t)
td := t.TempDir()
dir := filepath.Join(td, "dir")
if err := os.MkdirAll(filepath.Join(td, "dir"), 0755); err != nil {
t.Fatal(err)
}
touch(t, filepath.Join(dir, "foo"))
link := filepath.Join(td, "link")
if err := os.Symlink("dir", link); err != nil {
t.Fatal(err)
}
abslink := filepath.Join(td, "abslink")
if err := os.Symlink(dir, abslink); err != nil {
t.Fatal(err)
}
linklink := filepath.Join(td, "linklink")
if err := os.Symlink("link", linklink); err != nil {
t.Fatal(err)
}
// Per https://pubs.opengroup.org/onlinepubs/9699919799.2013edition/basedefs/V1_chap04.html#tag_04_12:
// “A pathname that contains at least one non- <slash> character and that ends
// with one or more trailing <slash> characters shall not be resolved
// successfully unless the last pathname component before the trailing <slash>
// characters names an existing directory [...].”
//
// Since Walk does not traverse symlinks itself, its behavior should depend on
// whether the path passed to Walk ends in a slash: if it does not end in a slash,
// Walk should report the symlink itself (since it is the last pathname component);
// but if it does end in a slash, Walk should walk the directory to which the symlink
// refers (since it must be fully resolved before walking).
for _, tt := range []struct {
desc string
root string
want []string
buggyGOOS []string
}{
{
desc: "no slash",
root: link,
want: []string{link},
},
{
desc: "slash",
root: link + string(filepath.Separator),
want: []string{link, filepath.Join(link, "foo")},
},
{
desc: "abs no slash",
root: abslink,
want: []string{abslink},
},
{
desc: "abs with slash",
root: abslink + string(filepath.Separator),
want: []string{abslink, filepath.Join(abslink, "foo")},
},
{
desc: "double link no slash",
root: linklink,
want: []string{linklink},
},
{
desc: "double link with slash",
root: linklink + string(filepath.Separator),
want: []string{linklink, filepath.Join(linklink, "foo")},
buggyGOOS: []string{"darwin", "ios"}, // https://go.dev/issue/59586
},
} {
tt := tt
t.Run(tt.desc, func(t *testing.T) {
var walked []string
err := filepath.Walk(tt.root, func(path string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
t.Logf("%#q: %v", path, info.Mode())
walked = append(walked, filepath.Clean(path))
return nil
})
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(walked, tt.want) {
t.Logf("Walk(%#q) visited %#q; want %#q", tt.root, walked, tt.want)
if slices.Contains(tt.buggyGOOS, runtime.GOOS) {
t.Logf("(ignoring known bug on %v)", runtime.GOOS)
} else {
t.Fail()
}
}
})
}
}
var basetests = []PathTest{
{"", "."},
{".", "."},
{"/.", "."},
{"/", "/"},
{"////", "/"},
{"x/", "x"},
{"abc", "abc"},
{"abc/def", "def"},
{"a/b/.x", ".x"},
{"a/b/c.", "c."},
{"a/b/c.x", "c.x"},
}
var winbasetests = []PathTest{
{`c:\`, `\`},
{`c:.`, `.`},
{`c:\a\b`, `b`},
{`c:a\b`, `b`},
{`c:a\b\c`, `c`},
{`\\host\share\`, `\`},
{`\\host\share\a`, `a`},
{`\\host\share\a\b`, `b`},
}
func TestBase(t *testing.T) {
tests := basetests
if runtime.GOOS == "windows" {
// make unix tests work on windows
for i := range tests {
tests[i].result = filepath.Clean(tests[i].result)
}
// add windows specific tests
tests = append(tests, winbasetests...)
}
for _, test := range tests {
if s := filepath.Base(test.path); s != test.result {
t.Errorf("Base(%q) = %q, want %q", test.path, s, test.result)
}
}
}
var dirtests = []PathTest{
{"", "."},
{".", "."},
{"/.", "/"},
{"/", "/"},
{"/foo", "/"},
{"x/", "x"},
{"abc", "."},
{"abc/def", "abc"},
{"a/b/.x", "a/b"},
{"a/b/c.", "a/b"},
{"a/b/c.x", "a/b"},
}
var nonwindirtests = []PathTest{
{"////", "/"},
}
var windirtests = []PathTest{
{`c:\`, `c:\`},
{`c:.`, `c:.`},
{`c:\a\b`, `c:\a`},
{`c:a\b`, `c:a`},