Mocking MailController with ActionMailer.net using Moq

Question

I'm trying to mock my MailController

_mockMailController = new Mock<IMailController>();
_mockMailController.Setup(x => x.ForgotPassword("[email protected]"));

My controller takes an IMailController as a dependancy, however when I call

mailController.ForgotPassword("[email protected]").Deliver();

I get a NullReferenceException (because ForgotPassword doesn't return anything, I guess)

Ideally, we'd stub EmailResult ?

How did you implement ForgotPassword method in your controller? — Ufuk Hacıoğulları, May 02 '13 at 22:43
It's not a 'Controller' as such. I followed this: http://geeksharp.com/2011/01/26/actionmailer-net-email-templates-for-the-mvc-crowd/ — Alex, May 03 '13 at 07:22

score 1 · Answer 1 · answered May 03 '13 at 08:01

1

You have not created a setup for the mock return a value from ForgotPassword method. With default behavior this will return default value for the type, which is null in this case.

You can mock the return value like this:

_mockMailController.Setup(x => x.ForgotPassword("[email protected]"))
                   .Returns(new SomeType());

answered May 03 '13 at 08:01

Ufuk Hacıoğulları

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Yes, I realise this. I'm sorry, perhaps i should have been more specific in my question. The return type for this is a very complex (and itself has lots of dependencies) so i was looking for someone who'd used ActionMailer.net, and mocked it, to share their experience – Alex May 03 '13 at 11:28
Well if you are not going to do anything with the the return type, you could move ActionMailer.Net code to another class. This way you could skip testing and mocking 3rd party component code. – Ufuk Hacıoğulları May 03 '13 at 11:32

score 1 · Accepted Answer · answered May 03 '13 at 13:31

I created a pull request for the ActionMailer.Net that intoduces an IEmailResult interface that makes mocking very easy. Have a look at this:

https://bitbucket.org/swaj/actionmailer.net/pull-request/4/iemailresult-interface-for-better/

Until the pull request is merged you could use a custom build from my frok of the project.

https://bitbucket.org/hydr/xv-actionmailer.net

Mocking get's as easy as writing (with FakeItEasy, Moq might be similar):

//SetUp
_myMailer = A.Fake<IMyMailer>();

//Later on in Assert
A.CallTo(() => _myMailer.MyTestEmail()).MustHaveHappened(Repeated.Exactly.Once);

when the Mailer is defined like:

public class MailController : MailerBase, IMyMailer
{
    public IEmailResult MyTestEmail()
    {
        To.Add("[email protected]");
        From = "[email protected]";
        Subject = "Subject";
        return Email();
    }
}

I appreciate any reviews on my pull request btw :) – hydr May 03 '13 at 13:36 — hydr, May 03 '13 at 13:36

Mocking MailController with ActionMailer.net using Moq

2 Answers2