public void AddGame() { //Arrange var gameController = new GamesController(new Mock <IGameService>().Object); var winner = "Lorem Ipsum"; var loser = "Dolor Sit Amet"; var result = new ResultDto() { Winner = winner, Loser = loser }; //Act var response = gameController.AddGameDetails(result); var responseContent = response.Content; var responseContentResult = responseContent.ReadAsStringAsync().Result; //Assert response.StatusCode.Should().Be(HttpStatusCode.Created); responseContentResult.Should().Be("Game registered, winner Lorem Ipsum, loser Dolor Sit Amet"); }