t.Fatalf("Glob returned err=%v, want %v", err, path.ErrBadPattern)
	}
}

type globOnly struct{ GlobFS }

func (globOnly) Open(name string) (File, error) { return nil, ErrNotExist }

func TestGlobMethod(t *testing.T) {
	check := func(desc string, names []string, err error) {
		t.Helper()
		if err != nil || len(names) != 1 || names[0] != "hello.txt" {