public void GetCompletedLessonsTest_Fails(string userGuid) { _resultsService.Setup(x => x.GetUserLessonsByUserGuid(It.IsAny <string>())).Returns((new List <UserLesson>()).AsQueryable()); _resultsService.Setup(x => x.GetUserByGuid(It.IsAny <string>())).Returns((User)null); var result = _resultsManager.GetCompletedLessons(userGuid); Assert.True(result != null); Assert.False(result.Success); }