public void GetResultsForUserAsyncShouldRetrieveAssignmentsWithLastTestsResultsOfUserAndConvertThemToAssignmentResultDtos() { //Arrange var chapterId = _random.NextPositive(); var userId = _random.NextPositive(); var assignmentWithResults = new AssignmentWithLastResultsOfUser(); var assignmentsWithResults = new List <AssignmentWithLastResultsOfUser> { assignmentWithResults }; _testResultRepositoryMock.Setup(repo => repo.GetLastTestResultsOfChapterAsync(It.IsAny <int>(), It.IsAny <int>(), It.IsAny <DateTime?>())) .ReturnsAsync(assignmentsWithResults); var assignmentResultDto = new AssignmentResultDto(); _testResultConverterMock .Setup(converter => converter.ToAssignmentResultDto(It.IsAny <AssignmentWithLastResultsOfUser>())) .Returns(assignmentResultDto); //Act var results = _service.GetResultsForUserAsync(chapterId, userId, null).Result; //Assert Assert.That(results, Has.Exactly(1).EqualTo(assignmentResultDto)); _testResultRepositoryMock.Verify(repo => repo.GetLastTestResultsOfChapterAsync(chapterId, userId, null), Times.Once); _testResultConverterMock.Verify(converter => converter.ToAssignmentResultDto(assignmentWithResults), Times.Once); }