if pe, ok := err.(*fs.PathError); !ok || !IsNotExist(err) || pe.Path != badDir {
		t.Errorf("TempDir error = %#v; want PathError for path %q satisfying IsNotExist", err, badDir)
	}
}

func TestMkdirTempBadPattern(t *testing.T) {
	t.Parallel()

	tmpDir, err := MkdirTemp("", t.Name())
	if err != nil {
		t.Fatal(err)
	}
	defer RemoveAll(tmpDir)

	const sep = string(PathSeparator)
	tests := []struct {