public async Task When_GettingStandardOptions_Then_ReturnsListOfStandardOptions(IEnumerable <StandardOptions> options) { _mockStandardRepository.Setup(s => s.GetAllStandardOptions()).ReturnsAsync(options); var result = await _standardService.GetAllStandardOptions(); Assert.IsInstanceOf <IEnumerable <StandardOptions> >(result); Assert.AreEqual(result.Count(), options.Count()); }