public void ConstructorShouldFailWhenWriteRepositoryIsNull()
        {
            // Arrange
            ITransportTypeWriteRepository transportTypeWriteRepository = null;
            var identifierProvider = new Mock <IIdentifierProvider>().Object;
            var versionProvider    = new Mock <IVersionProvider>().Object;

            // Act
            Action ctor = () =>
            {
                new CreateTransportTypeCommandHandler(transportTypeWriteRepository,
                                                      identifierProvider,
                                                      versionProvider);
            };

            // Assert
            ctor.Should().Throw <ArgumentNullException>();
        }
 public CreateTransportTypeCommandHandler(ITransportTypeWriteRepository transportTypeWriteRepository, IIdentifierProvider identifierProvider, IVersionProvider versionProvider)
 {
     _transportTypeWriteRepository = transportTypeWriteRepository ?? throw new ArgumentNullException(nameof(transportTypeWriteRepository));
     _identifierProvider           = identifierProvider ?? throw new ArgumentNullException(nameof(identifierProvider));
     _versionProvider = versionProvider ?? throw new ArgumentNullException(nameof(versionProvider));
 }