}
			if test.wantErr && !sawErr {
				t.Error("succeeded but want error")
			} else if !test.wantErr && sawErr {
				t.Error("unexpected error")
			}
			if test.want != nil && !reflect.DeepEqual(files, test.want) {
				t.Errorf("got %v want %v", files, test.want)
			}
		})
	}
}

func TestFSModTime(t *testing.T) {
	t.Parallel()
	z, err := OpenReader("testdata/subdir.zip")