Use a struct with OCMock?

[Cliff76]

First off, sorry for the x-post! I posted on StackOverflow before I discovered this site so head over there for more of the same. I am having trouble using passing structs to mocks using OCMock. I'm still relatively new to ObjC, Cocoa, XCode and the whole nine yards but I'm no stranger to TDD and mock objects. I have a case where I need to mock a "thing" that takes struct params and returns a struct and I'm having soo much trouble. Has anybody here done TDD w/ OCMock? If not, what's your excuse? If you have seen similar issues could you please weigh in? Thanx in advance!

Your friendly neighborhoood ObjC Developer,
Cliff

[Cliff76]

In my example I try to wrap the struct in an NSValue and pass that as the return value for the mock. Then when the object I'm testing calls into the mock the return value gets munged. So either I'm incorrectly wrapping the value or I'm incorrectly creating it.
Here's my define for wrapping the struct:

#define OCMOCK_STRUCT(atype, variable) [NSValue value:&variable withObjCType:@encode(atype)]

Here's the code that sets the expectation:

	CLLocationCoordinate2D ulLL = (CLLocationCoordinate2D){1.0f,1.0f};
	CLLocationCoordinate2D lrLL = (CLLocationCoordinate2D){2.0f,2.0f};
	[[[(id)aMap expect] andReturn:OCMOCK_STRUCT(CLLocationCoordinate2D, ulLL)] pixelToLatLong:(CGPoint){0,0}];
	[[[(id)aMap expect] andReturn:OCMOCK_STRUCT(CLLocationCoordinate2D, lrLL)] pixelToLatLong:(CGPoint){320,460}];//lower right point

When I call into my mock I get garbage in the mock return values. Help?