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testing: drop unusual characters from TempDir directory name

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Only use safe characters of the test name for the os.MkdirTemp pattern.
This currently includes the alphanumeric characters and ASCII
punctuation characters known not to interact with globs.

Fixes #46624

Change-Id: I402c34775b943fed9b97963c52f79245cc16dc1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/326010
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser 2021-06-08 15:33:54 +02:00 committed by Tobias Klauser
parent b0355a3e72
commit 97cee43c93
2 changed files with 31 additions and 13 deletions
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34
src/testing/testing.go
View File

@ -252,6 +252,8 @@ import (
"sync"
"sync/atomic"
"time"
"unicode"
"unicode/utf8"
)
var initRan bool
@ -908,11 +910,6 @@ func (c *common) Cleanup(f func()) {
c.cleanups = append(c.cleanups, fn)
}
var tempDirReplacer struct {
sync.Once
r *strings.Replacer
}
// TempDir returns a temporary directory for the test to use.
// The directory is automatically removed by Cleanup when the test and
// all its subtests complete.
@ -936,13 +933,26 @@ func (c *common) TempDir() string {
if nonExistent {
c.Helper()
// os.MkdirTemp doesn't like path separators in its pattern,
// so mangle the name to accommodate subtests.
tempDirReplacer.Do(func() {
tempDirReplacer.r = strings.NewReplacer("/", "_", "\\", "_", ":", "_")
})
pattern := tempDirReplacer.r.Replace(c.Name())
// Drop unusual characters (such as path separators or
// characters interacting with globs) from the directory name to
// avoid surprising os.MkdirTemp behavior.
mapper := func(r rune) rune {
if r < utf8.RuneSelf {
const allowed = "!#$%&()+,-.=@^_{}~ "
if '0' <= r && r <= '9' ||
'a' <= r && r <= 'z' ||
'A' <= r && r <= 'Z' {
return r
}
if strings.ContainsRune(allowed, r) {
return r
}
} else if unicode.IsLetter(r) || unicode.IsNumber(r) {
return r
}
return -1
}
pattern := strings.Map(mapper, c.Name())
c.tempDir, c.tempDirErr = os.MkdirTemp("", pattern)
if c.tempDirErr == nil {
c.Cleanup(func() {

10
src/testing/testing_test.go
View File

@ -58,6 +58,9 @@ func TestTempDir(t *testing.T) {
t.Run("test:subtest", testTempDir)
t.Run("test/..", testTempDir)
t.Run("../test", testTempDir)
t.Run("test[]", testTempDir)
t.Run("test*", testTempDir)
t.Run("äöüéè", testTempDir)
}
func testTempDir(t *testing.T) {
@ -74,7 +77,7 @@ func testTempDir(t *testing.T) {
if err != nil {
t.Fatal(err)
}
t.Errorf("directory %q stil exists: %v, isDir=%v", dir, fi, fi.IsDir())
t.Errorf("directory %q still exists: %v, isDir=%v", dir, fi, fi.IsDir())
default:
if !t.Failed() {
t.Fatal("never received dir channel")
@ -108,6 +111,11 @@ func testTempDir(t *testing.T) {
if len(files) > 0 {
t.Errorf("unexpected %d files in TempDir: %v", len(files), files)
}
glob := filepath.Join(dir, "*.txt")
if _, err := filepath.Glob(glob); err != nil {
t.Error(err)
}
}
func TestSetenv(t *testing.T) {