public async void GetByIdAsync_When_Called_Should_Return_Broker_including_Customers()
{
//Arrange
SoftDbContext _context = new SoftDbContext();
var _brokerRepository = new BrokerRepository(_context);
//Act
var firstBrokerInRepository = _context.Brokers.FirstOrDefault();
Assert.NotNull(firstBrokerInRepository);
var broker = await _brokerRepository.FindByIdAsync(firstBrokerInRepository.Id);
//Assert
Assert.NotEmpty(broker.Customers);
}