public async Task GetUniqueVolunteersByDate_WhenEnrollmentsMatchedWithGivenParameters_ShouldReturnFilteredEnrollments() { //Arrange _enrollmentProcessorMock.Setup(p => p.GetUniqueVolunteersByDate("01/01/2019", "01/01/2019", null)).ReturnsAsync(_enrollments); var controller = new EnrollmentController(_enrollmentProcessorMock.Object); //Act var response = await controller.GetUniqueVolunteersByDate("01/01/2019", "01/01/2019"); //Assert var okResult = Assert.IsType <OkObjectResult>(response); var returnValue = Assert.IsType <List <Enrollment> >(okResult.Value); Assert.NotEmpty(returnValue); }