I am trying to add unit tests to my iPhone project in Xcode. Everything works, its great. Except when I am adding a class.m that uses CGRect (or other structs, CGPoint etc) to the unit test target (under "Compile Sources") - I am getting a compilation error: "'CGRect' undeclared (first use in this function)". I tried messing with my unit test target in various ways, but so far I haven't been able to get past this. What am I missing?