public async Task When_GetCountriesOfResidenceAsync_Called_Expect_FilteredAndOrderedResult() { //Arrange var dbResult = new List <CountryOfResidence> { new CountryOfResidence { IsAvailable = true, Id = 1, Name = "Bulgaria", Order = 1 }, new CountryOfResidence { IsAvailable = false, Id = 2, Name = "Japan", Order = 2 }, new CountryOfResidence { IsAvailable = true, Id = 3, Name = "Brazil", Order = 3 }, }; _countryOfResidenceRepositoryMock.Setup(x => x.GetAllAsync()) .ReturnsAsync(dbResult); //Act var response = await _service.GetCountriesOfResidenceAsync(); //Assert var expectedResult = dbResult .Where(o => o.IsAvailable) .OrderBy(o => o.Order) .ToList(); _countryOfResidenceRepositoryMock.Verify(x => x.GetAllAsync(), Times.Once); Assert.Equal(expectedResult.Count, response.Count); Assert.Equal(expectedResult[0].Order, response[0].Order); }