default:
		t.Errorf("rename %q, %q: expected %T, got %T %v", from, to, new(LinkError), err, err)
	}
}

func TestRenameCaseDifference(pt *testing.T) {
	from, to := "renameFROM", "RENAMEfrom"
	tests := []struct {
		name   string
		create func() error
	}{
		{"dir", func() error {
			return Mkdir(from, 0777)
		}},
		{"file", func() error {
			fd, err := Create(from)