public async void ByUserId_Not_Exists()
{
var mock = new ServiceMockFacade <ICommentService, ICommentRepository>();
mock.RepositoryMock.Setup(x => x.ByUserId(It.IsAny <int?>(), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <Comment> >(new List <Comment>()));
var service = new CommentService(mock.LoggerMock.Object,
mock.MediatorMock.Object,
mock.RepositoryMock.Object,
mock.ModelValidatorMockFactory.CommentModelValidatorMock.Object,
mock.DALMapperMockFactory.DALCommentMapperMock);
List <ApiCommentServerResponseModel> response = await service.ByUserId(default(int));
response.Should().BeEmpty();
mock.RepositoryMock.Verify(x => x.ByUserId(It.IsAny <int?>(), It.IsAny <int>(), It.IsAny <int>()));
}