Assert a method was called whilst verifying the parameters are correct

Question

Given the following snippet from my test:

var mockProvider = MockRepository.GenerateMock<IItemProvider>();

var target = new ItemService(mockProvider);

target.SaveItem(item);

Internally target.SaveItem makes a call like this:

provider.SaveItem(new SaveContract(item.Id, user, contents)); where provider is the local name for the mockProvider passed in.

How do I:

1. Verify provider.SaveItem is called whilst also
2. Asserting that the values of item.Id, user and contents are as they should be.

I think I might be able to use mockProvider.AssertWasCalled but can't figure out the syntax to set the condition of the parameters passed to the constructor of SaveContract.

TIA

Answer 1

Ok so based on this I did something like the following:

var mockProvider = MockRepository.GenerateMock<IItemProvider>();
var target = new ItemService(mockProvider);
Item testItem = null;

mockProvider.Expect(c => c.SaveItem(Arg<Item>.Is.Anything))
.WhenCalled(call =>
{
    testItem = (Item)call.Arguments[0];
});


target.SaveItem(item);//item initialised elsewhere


Assert.AreEqual(item.Id, testItem.Id);