Resolve feedbacks.

internal/resolver/dns/dns_resolver_test.go

@@ -1233,7 +1233,7 @@ func (s) TestResolveTimeout(t *testing.T) {
 	overrideResolveTimeoutDuration(t, timeoutDur)
 
 	// context with a bit larger
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
 	defer cancel()
 
 	// We are trying to resolve hostname which takes infinity time to resolve.
@@ -1249,23 +1249,11 @@ func (s) TestResolveTimeout(t *testing.T) {
 
 	// block testNetResolver.testNetResolver until timeout
 	_ = tr.lookupHostCh.SendContext(ctx, nil)
-	_, stateCh, errCh := buildResolverWithTestClientConn(t, target)
-
-	// wait until timeout
-	<-ctx.Done()
-
-	// unblock testNetResolver.lookupHostCh channel
-	if _, ok := tr.lookupHostCh.ReceiveOrFail(); !ok {
-		t.Fatalf("failed for lookup() call.")
-	}
-
+	_, _, errCh := buildResolverWithTestClientConn(t, target)
 	select {
 	case err := <-errCh:
-		if err == nil || !strings.Contains(err.Error(), "hostLookup timeout") {
+		if err == nil || !strings.Contains(err.Error(), "context deadline exceeded") {
 			t.Fatalf(`We expect to see timed out error`)
 		}
-
-	case <-stateCh:
-		t.Fatalf(`We expect to see timed out error`)
 	}
 }

internal/resolver/dns/fake_net_resolver_test.go

@@ -42,12 +42,7 @@ type testNetResolver struct {
 func (tr *testNetResolver) LookupHost(ctx context.Context, host string) ([]string, error) {
 	if tr.lookupHostCh != nil {
 		if err := tr.lookupHostCh.SendContext(ctx, nil); nil != err {
-			return nil, &net.DNSError{
-				Err:         "hostLookup timeout",
-				Name:        host,
-				Server:      "fake",
-				IsTemporary: true,
-			}
+			return nil, err
 		}
 	}
 

resolver/dns/dns_resolver.go

@@ -37,7 +37,7 @@ import (
 // It must be called only at application startup, before any gRPC calls are made.
 // Modifying this value after initialization is not thread-safe.
 //
-// The default value is 10 seconds. Setting the timeout too low may result
+// The default value is 30 seconds. Setting the timeout too low may result
 // in premature timeouts during resolution, while setting it too high may
 // lead to unnecessary delays in service discovery. Choose a value appropriate
 // for your specific needs and network environment.