Different return values the first and second time with Moq

Question

I have a test like this:

    [TestCase("~/page/myaction")]
    public void Page_With_Custom_Action(string pat         


        

Answer 1

You can use a callback when setting up your mock object. Take a look at the example from the Moq Wiki (http://code.google.com/p/moq/wiki/QuickStart).

// returning different values on each invocation
var mock = new Mock<IFoo>();
var calls = 0;
mock.Setup(foo => foo.GetCountThing())
    .Returns(() => calls)
    .Callback(() => calls++);
// returns 0 on first invocation, 1 on the next, and so on
Console.WriteLine(mock.Object.GetCountThing());

Your setup might look like this:

var pageObject = pageModel.Object;
repository.Setup(x => x.GetPageByUrl<IPageModel>(path)).Returns(() => pageObject).Callback(() =>
            {
                // assign new value for second call
                pageObject = new PageModel();
            });