} else if equal && test.expectDiff {
					t.Errorf("expected diff, but didn't get any")
				}
			}
		})
	}
}

func withVendorExtensions(s *spec.Schema, key string, value interface{}) *spec.Schema {
	s.VendorExtensible.AddExtension(key, value)
	return s
}

func refEqual(x spec.Ref, y spec.Ref) bool {
	return x.String() == y.String()