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

            // Act
            Action ctor = () =>
            {
                new CreateTypePlanningCommandHandler(typePlanningWriteRepository,
                                                     identifierProvider,
                                                     versionProvider);
            };

            // Assert
            ctor.Should().Throw <ArgumentNullException>();
        }
 public CreateTypePlanningCommandHandler(ITypePlanningWriteRepository typePlanningWriteRepository, IIdentifierProvider identifierProvider, IVersionProvider versionProvider)
 {
     _typePlanningWriteRepository = typePlanningWriteRepository ?? throw new ArgumentNullException(nameof(typePlanningWriteRepository));
     _identifierProvider          = identifierProvider ?? throw new ArgumentNullException(nameof(identifierProvider));
     _versionProvider             = versionProvider ?? throw new ArgumentNullException(nameof(versionProvider));
 }