func TestFS(t *testing.T) {
	for _, test := range []struct {
		file string
		want []string
	}{
		{
			"testdata/unix.zip",
			[]string{"hello", "dir/bar", "readonly"},
		},
		{
			"testdata/subdir.zip",
			[]string{"a/b/c"},
		},
	} {
		test := test
		t.Run(test.file, func(t *testing.T) {
			t.Parallel()
			z, err := OpenReader(test.file)
			if err != nil {
				t.Fatal(err)
			}