syncthing/lib/osutil/traversessymlink_test.go

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// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package osutil_test
import (
"io/ioutil"
"os"
"path/filepath"
"runtime"
"testing"
"github.com/syncthing/syncthing/lib/fs"
"github.com/syncthing/syncthing/lib/osutil"
)
func TestTraversesSymlink(t *testing.T) {
tmpDir, err := ioutil.TempDir(".", ".test-TraversesSymlink-")
if err != nil {
panic("Failed to create temporary testing dir")
}
defer os.RemoveAll(tmpDir)
fs := fs.NewFilesystem(fs.FilesystemTypeBasic, tmpDir)
fs.MkdirAll("a/b/c", 0755)
if err = osutil.DebugSymlinkForTestsOnly(filepath.Join(fs.URI(), "a", "b"), filepath.Join(fs.URI(), "a", "l")); err != nil {
if runtime.GOOS == "windows" {
t.Skip("Symlinks aren't working")
}
t.Fatal(err)
}
// a/l -> b, so a/l/c should resolve by normal stat
info, err := fs.Lstat("a/l/c")
if err != nil {
t.Fatal("unexpected error", err)
}
if !info.IsDir() {
t.Fatal("error in setup, a/l/c should be a directory")
}
cases := []struct {
name string
traverses bool
}{
// Exist
{".", false},
{"a", false},
{"a/b", false},
{"a/b/c", false},
// Don't exist
{"x", false},
{"a/x", false},
{"a/b/x", false},
{"a/x/c", false},
// Symlink or behind symlink
{"a/l", true},
{"a/l/c", true},
// Non-existing behind a symlink
{"a/l/x", true},
}
for _, tc := range cases {
if res := osutil.TraversesSymlink(fs, tc.name); tc.traverses == (res == nil) {
t.Errorf("TraversesSymlink(%q) = %v, should be %v", tc.name, res, tc.traverses)
}
}
}
func TestIssue4875(t *testing.T) {
tmpDir, err := ioutil.TempDir("", ".test-Issue4875-")
if err != nil {
panic("Failed to create temporary testing dir")
}
defer os.RemoveAll(tmpDir)
testFs := fs.NewFilesystem(fs.FilesystemTypeBasic, tmpDir)
testFs.MkdirAll("a/b/c", 0755)
if err = osutil.DebugSymlinkForTestsOnly(filepath.Join(testFs.URI(), "a", "b"), filepath.Join(testFs.URI(), "a", "l")); err != nil {
if runtime.GOOS == "windows" {
t.Skip("Symlinks aren't working")
}
t.Fatal(err)
}
// a/l -> b, so a/l/c should resolve by normal stat
info, err := testFs.Lstat("a/l/c")
if err != nil {
t.Fatal("unexpected error", err)
}
if !info.IsDir() {
t.Fatal("error in setup, a/l/c should be a directory")
}
testFs = fs.NewFilesystem(fs.FilesystemTypeBasic, filepath.Join(tmpDir, "a/l"))
if err := osutil.TraversesSymlink(testFs, "."); err != nil {
t.Error(`TraversesSymlink on filesystem with symlink at root returned error for ".":`, err)
}
}
var traversesSymlinkResult error
func BenchmarkTraversesSymlink(b *testing.B) {
os.RemoveAll("testdata")
defer os.RemoveAll("testdata")
fs := fs.NewFilesystem(fs.FilesystemTypeBasic, "testdata")
fs.MkdirAll("a/b/c", 0755)
for i := 0; i < b.N; i++ {
traversesSymlinkResult = osutil.TraversesSymlink(fs, "a/b/c")
}
b.ReportAllocs()
}