exp = tt.expectedGateway
					}
					if vh == nil && exp != nil {
						t.Fatalf("route %q not found, have %v", tt.routeName, xdstest.MapKeys(r))
					}
					gotHosts := xdstest.ExtractVirtualHosts(vh)
					for wk, wv := range exp {
						got := gotHosts[wk]
						if !reflect.DeepEqual(wv, got) {
							t.Errorf("%q: wanted %v, got %v (had %v)", wk, wv, got, xdstest.MapKeys(gotHosts))
						}