public async Task Return_Correct_Type_When_GetAllPhotos_Is_Called() { _fakeHttpMessageHandler.Setup(x => x.Send(It.IsAny <HttpRequestMessage>())).Returns(new HttpResponseMessage { StatusCode = HttpStatusCode.OK, Content = new StringContent(FakeHttpResponseMessage.Message) }); var sut = await _photoService.GetAllPhotosAsync(); sut.ShouldBeOfType <List <Photo> >(); }