我如何使用Moles为C＃中的一个方法的多次调用返回不同的值？

Question

I've been trying to find a solution for this, but either I've been looking with the wrong search terms or there simply isn't an answer for my question yet.

Problem: I've got a method that I'd like to write a unit test for. Within this method there is an external dependency that I can't really resolve, so I'll have to use Moles to create my unit test.

This external dependency consists of a method on an instance that is called multiple (two) times, and the second time I'd like to return a different value with Moles.

...
bool myVar = SomeInstance.SomeMethod(); // Here I'd like to return true
if( myVar )
...
...
bool myOtherVar = SomeInstance.SomeMethod(); // Here I'd like to return false
...

Now usually I set it up like

MSomeInstance.SomeMethod.AllInstances.SomeMethod = @this => true;

But how can I have different behaviours for both calls? When I write another line following the one above with "false" being returned, this "overwrites" the first one, so I'll always get false as a result.

Any ideas?

Answer 1

It's a bit ugly, but possible:

var toggle = false;
MSomeInstance.SomeMethod.AllInstances.SomeMethod =
    @this => { toggle = !toggle; return toggle; };

The first call will return true, the second false.