filepath.ToSlash(cwd) + "/testdata/dirfs/a", // not DirFS("/")
	} {
		_, err := d.Open(path)
		if err == nil {
			t.Fatalf(`DirFS("").Open(%q) succeeded`, path)
		}
	}
}

func TestDirFSPathsValid(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skipf("skipping on Windows")
	}
	t.Parallel()

	d := t.TempDir()