gistfile1.txt

        [Fact]
        public async Task can_recover_buyback()
        {
            //arrange
            var buybackId = Guid.NewGuid();
            InitialiseViewModel(true, buybackId);
            _contractService.GetContract(buybackId).Returns(new CustomerBuybackDto { ContractItems = new ObservableCollection<ContractItemDto>() });
            _buybackService.RecoverAsync(buybackId).Returns(TaskEx.Run(() => { }));
            _uiService.AddResult(MessageBoxResult.Yes);

            //act
            await _viewModelUnderTest.RecoverCommand.ExecuteAsync(null);

            //assert
            _buybackService.Received().RecoverAsync(buybackId);
        }

//This line, I dont want :P
_buybackService.RecoverAsync(buybackId).Returns(TaskEx.Run(() => { }));

// RecoverAsync returns Task, which is basically the void of the async/await world.
// Also have some wcf calls we have moved from IService to IServiceAsync, then it fails because IService automapped the response, Async returns Task<TResponse>, and returns null