public async void GetAddressesByClientIdAsync_Returns_All_Addresses_for_One_Client(int client_id)
{
//gets all BillableActivities for one employee
var _addressesForClient = _addresses.Where(ad => ad.Client_Id == client_id);
IEnumerable <AddressDTO> expectedDtos = _mapper.Map <IEnumerable <AddressDTO> >(_addressesForClient);
//Setup repository
_mockRepository.Setup(repo => repo.GetByAsync(co => co.Client_Id == client_id))
.ReturnsAsync(_addressesForClient);
//instantiate System Under Test
var controller = new AddressesController(_mockRepository.Object, _mapper, _logger);;
//call SUT method
var actionResult = await controller.GetAddressesByClientIdAsync(client_id);
//Assert results
Assert.NotNull(actionResult);
//Assert object in actionresult
var result = Assert.IsType <OkObjectResult>(actionResult.Result);
var actualAddresses = (IEnumerable <AddressDTO>)(result.Value);
IEnumerable <AddressDTO> actualDtos = _mapper.Map <IEnumerable <AddressDTO> >(actualAddresses);
//use FluentAssertions to compare Collections of Reference types
actualDtos.Should().BeEquivalentTo(expectedDtos, options => options.ComparingByMembers <AddressDTO>());
}