- (void)testMemory {
    __weak id testingPointer = nil;
    id someObject = // some object with a 'foo' property

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    {
        // Point the weak pointer to the thing we expect to be dealloc'd
        // when we're done.
        id theFoo = [someObject theFoo];
        testingPointer = theFoo;

        [someObject setTheFoo:somethingElse];

        // At this point, we still have a reference to 'theFoo',
        // so 'testingPointer' is still valid. We need to nil it out.
        STAssertNotNil(testingPointer, @"This will never happen, since we're still holding it.")

        theFoo = nil;
    }
    [pool drain];



    // Now the last strong reference to 'theFoo' should be gone, so 'testingPointer' will revert to nil
    STAssertNil(testingPointer, @"Something didn't release %@ when it should have", testingPointer);
}