for _, primaryField := range primaryFields {
			lookUpName := primarySchemaName + primaryField.Name
			if gl == guessBelongs {
				lookUpName = field.Name + primaryField.Name
			}

			lookUpNames := []string{lookUpName}
			if len(primaryFields) == 1 {
				lookUpNames = append(lookUpNames, strings.TrimSuffix(lookUpName, primaryField.Name)+"ID",

		},
		{
			name:       "node does not exist",
			lookupName: "whale",
			success:    false,
		},
		{
			name:       "node not labelled yet",
			lookupName: "robin",
			node: v1.Node{
				ObjectMeta: metav1.ObjectMeta{
					Name: "robin",
				},
			},
			success: false,
		},
		{
			name:       "patch node when timeout",
			lookupName: "testnode",
			node: v1.Node{

// blocking might not be executed when the context gets canceled early.
func doBlockingWithCtx[T any](ctx context.Context, lookupName string, blocking func() (T, error)) (T, error) {
	if err := acquireThread(ctx); err != nil {
		var zero T
		return zero, &DNSError{
			Name:      lookupName,
			Err:       mapErr(err).Error(),
			IsTimeout: err == context.DeadlineExceeded,
		}
	}

	if ctx.Done() == nil {

			d++
		}
		s = d * secondsPerDay
	}

	return s + r.time - off
}

// lookupName returns information about the time zone with
// the given name (such as "EST") at the given pseudo-Unix time
// (what the given time of day would be in UTC).
func (l *Location) lookupName(name string, unix int64) (offset int, ok bool) {
	l = l.get()

	// First try for a zone with the right name that was actually

	if zoneName != "" {
		t := Date(year, Month(month), day, hour, min, sec, nsec, UTC)
		// Look for local zone with the given offset.
		// If that zone was in effect at the given time, use it.
		offset, ok := local.lookupName(zoneName, t.unixSec())
		if ok {
			t.addSec(-int64(offset))
			t.setLoc(local)
			return t, nil
		}

		// Otherwise, create fake zone with unknown offset.

	}
	cache.mu.Lock()
	defer cache.mu.Unlock()

	switch T := aliases.Unalias(T).(type) {
	case *types.Named:
		return cache.lookupNamed(T).value

	case *types.Pointer:
		if N, ok := aliases.Unalias(T.Elem()).(*types.Named); ok {
			return cache.lookupNamed(N).pointer
		}
	}

	// all other types
	// (The map uses pointer equivalence, not type identity.)
	mset := cache.others[T]
	if mset == nil {

// formatted presentation-format domain name.
//
// LookupCNAME uses [context.Background] internally; to specify the context, use
// [Resolver.LookupCNAME].
func LookupCNAME(host string) (cname string, err error) {
	return DefaultResolver.LookupCNAME(context.Background(), host)
}

// LookupCNAME returns the canonical name for the given host.

				break
			}
		}
	}

	cname, err := LookupCNAME("www.mit.edu")
	if err != nil {
		t.Errorf("LookupCNAME(www.mit.edu, mode=%v): %v", mode, err)
	} else if !strings.HasSuffix(cname, ".") {
		t.Errorf("LookupCNAME(www.mit.edu) = %v, want cname ending in . with trailing dot (mode=%v)", cname, mode)
	}

	mxs, err := LookupMX("google.com")

		s = s[i+1:] // remove address
	}
	if n, _, ok := dtoi(s); ok {
		return n, nil
	}
	return 0, &DNSError{Err: "unknown port", Name: errNetwork + "/" + service, IsNotFound: true}
}

func (r *Resolver) lookupCNAME(ctx context.Context, name string) (cname string, err error) {
	if order, conf := systemConf().hostLookupOrder(r, name); order != hostLookupCgo {
		return r.goLookupCNAME(ctx, name, order, conf)
	}

		}
	})
}

func TestNSLookupCNAME(t *testing.T) {
	testenv.MustHaveExternalNetwork(t)

	testLookup(t, func(t *testing.T, r *Resolver, server string) {
		cname, err := r.LookupCNAME(context.Background(), server)
		if err != nil {
			t.Fatalf("failed %s: %s", server, err)
		}
		if cname == "" {
			t.Fatalf("no result %s", server)
		}
		expected, err := nslookupCNAME(server)
		if err != nil {