public async Task Should_GetAllAsync_ReturnsAListOfHouses() { //Arrange const int residentialId = 1; var entities = new List <HouseEf> { new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, new HouseEf { ResidentialId = residentialId }, }; var models = new List <House> { new House(), new House(), new House(), new House(), new House() }; var parameter = new Parameter { ItemsPerPage = 5 }; var mock = entities.AsQueryable().BuildMockDbSet(); _houseRepositoryMock.Setup(x => x.AsNoTracking()).Returns(mock.Object); _mapperMock.Setup(x => x.Map <IEnumerable <House> >(It.IsAny <IEnumerable <HouseEf> >())) .Returns(models); _manager = new HouseManager(_mapperMock.Object, _houseRepositoryMock.Object); //Act var result = await _manager.GetAllAsync(residentialId, parameter); //Assert _houseRepositoryMock.Verify(x => x.AsNoTracking(), Times.Once); _mapperMock.Verify(x => x.Map <IEnumerable <House> >(It.IsAny <IEnumerable <HouseEf> >()), Times.Once); Assert.NotNull(result); Assert.Equal(10, result.TotalOfItems); Assert.Equal(5, result.Items.Count()); }