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os: restore testErrNotExist's working directory on os.Chdir success

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The existing implementation calls os.Chdir expecting the call not to
succeed. This change restores the original working directory in the
case that the call does succeed.

Fixes #45407

Change-Id: I61c57f6858b9a9058226e45e24276c7af8913048
Reviewed-on: https://go-review.googlesource.com/c/go/+/308849
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Grace Han 2021-04-09 15:49:22 +10:00 committed by Ian Lance Taylor
parent 263e13d1f7
commit 841bc14216
1 changed files with 12 additions and 4 deletions
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16
src/os/error_test.go
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@ -33,7 +33,12 @@ func TestErrIsExist(t *testing.T) {
}
}
func testErrNotExist(name string) string {
func testErrNotExist(t *testing.T, name string) string {
originalWD, err := os.Getwd()
if err != nil {
t.Fatal(err)
}
f, err := os.Open(name)
if err == nil {
f.Close()
@ -45,7 +50,10 @@ func testErrNotExist(name string) string {
err = os.Chdir(name)
if err == nil {
return "Chdir should have failed"
if err := os.Chdir(originalWD); err != nil {
t.Fatalf("Chdir should have failed, failed to restore original working directory: %v", err)
}
return "Chdir should have failed, restored original working directory"
}
if s := checkErrorPredicate("os.IsNotExist", os.IsNotExist, err, fs.ErrNotExist); s != "" {
return s
@ -56,13 +64,13 @@ func testErrNotExist(name string) string {
func TestErrIsNotExist(t *testing.T) {
tmpDir := t.TempDir()
name := filepath.Join(tmpDir, "NotExists")
if s := testErrNotExist(name); s != "" {
if s := testErrNotExist(t, name); s != "" {
t.Fatal(s)
return
}
name = filepath.Join(name, "NotExists2")
if s := testErrNotExist(name); s != "" {
if s := testErrNotExist(t, name); s != "" {
t.Fatal(s)
return
}