public async void ByTeacherId_Not_Exists()
{
var mock = new ServiceMockFacade <IRateService, IRateRepository>();
mock.RepositoryMock.Setup(x => x.ByTeacherId(It.IsAny <int>(), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <Rate> >(new List <Rate>()));
var service = new RateService(mock.LoggerMock.Object,
mock.MediatorMock.Object,
mock.RepositoryMock.Object,
mock.ModelValidatorMockFactory.RateModelValidatorMock.Object,
mock.DALMapperMockFactory.DALRateMapperMock);
List <ApiRateServerResponseModel> response = await service.ByTeacherId(default(int));
response.Should().BeEmpty();
mock.RepositoryMock.Verify(x => x.ByTeacherId(It.IsAny <int>(), It.IsAny <int>(), It.IsAny <int>()));
}