test.pattern, base, test.prefix, test.suffix)
		}
	}
}

// This string is from os.errPatternHasSeparator.
const patternHasSeparator = "pattern contains path separator"

func TestTempFile_BadPattern(t *testing.T) {
	tmpDir, err := TempDir("", t.Name())
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(tmpDir)

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