public async Task SaveAsyncWhenCoordinatorsReturnsSuccess()
        {
            //
            var mockCoordinatorRepository = GetDefaultICoordinatorRepositoryInstance();
            var mockIUnitOfWork           = GetDefaultIUnitOfWorkInstance();
            var mockFacultyRepository     = GetDefaultIFacultyRepositoryInstance();
            var mockAccountRepository     = GetDefaultIAccountRepositoryInstance();

            Coordinator coordinator = new Coordinator();

            mockCoordinatorRepository.Setup(r => r.AddAsync(coordinator))
            .Returns(Task.FromResult <Coordinator>(coordinator));
            var service = new CoordinatorService(mockCoordinatorRepository.Object,
                                                 mockAccountRepository.Object, mockFacultyRepository.Object, mockIUnitOfWork.Object);
            //
            CoordinatorResponse result = await service.SaveAsync(coordinator);

            var message = result.Message;

            //
            message.Should().Be("");
        }