public PaymentServiceBuilder MockWith(Account account)
{
_mockDataStore = MockRepository.GenerateMock <IDataStore>();
_mockDataStore.Stub(x => x.GetAccount(Arg <string> .Is.Anything))
.Return(account);
_mockDataStoreFactory = MockRepository.GenerateStub <IDataStoreFactory>();
_mockDataStoreFactory.Stub(x => x.Get()).Return(_mockDataStore);
return(this);
}