public async void Files_Not_Exists() { var mock = new ServiceMockFacade <IBucketRepository>(); mock.RepositoryMock.Setup(x => x.Files(default(int), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <File> >(new List <File>())); var service = new BucketService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.BucketModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLBucketMapperMock, mock.DALMapperMockFactory.DALBucketMapperMock, mock.BOLMapperMockFactory.BOLFileMapperMock, mock.DALMapperMockFactory.DALFileMapperMock); List <ApiFileResponseModel> response = await service.Files(default(int)); response.Should().BeEmpty(); mock.RepositoryMock.Verify(x => x.Files(default(int), It.IsAny <int>(), It.IsAny <int>())); }