// TEST_CONFIG #include "test.h" #include "testroot.i" #include <objc/runtime.h> @interface Super : TestRoot @end @implementation Super -(int)superMethod { return 0; } -(int)bothMethod { return 0; } @end @interface Sub : Super @end @implementation Sub -(int)subMethod { return 0; } -(int)bothMethod { return 0; } @end @interface Sub2 : Super @end @implementation Sub2 -(int)subMethod { return 0; } -(int)bothMethod { return 0; } @end id fn(id self __attribute__((unused)), SEL cmd __attribute__((unused)), ...) { return nil; } int main() { IMP superMethodFromSuper = class_getMethodImplementation([Super class], @selector(superMethod)); IMP bothMethodFromSuper = class_getMethodImplementation([Super class], @selector(bothMethod)); IMP subMethodFromSub = class_getMethodImplementation([Sub class], @selector(subMethod)); IMP bothMethodFromSub = class_getMethodImplementation([Sub class], @selector(bothMethod)); IMP subMethodFromSub2 = class_getMethodImplementation([Sub2 class], @selector(subMethod)); IMP bothMethodFromSub2 = class_getMethodImplementation([Sub2 class], @selector(bothMethod)); testassert(superMethodFromSuper); testassert(bothMethodFromSuper); testassert(subMethodFromSub); testassert(bothMethodFromSub); testassert(subMethodFromSub2); testassert(bothMethodFromSub2); BOOL ok; IMP imp; // class_addMethod doesn't replace existing implementations ok = class_addMethod([Super class], @selector(superMethod), (IMP)fn, NULL); testassert(!ok); testassert(class_getMethodImplementation([Super class], @selector(superMethod)) == superMethodFromSuper); // class_addMethod does override superclass implementations ok = class_addMethod([Sub class], @selector(superMethod), (IMP)fn, NULL); testassert(ok); testassert(class_getMethodImplementation([Sub class], @selector(superMethod)) == (IMP)fn); // class_addMethod does add root implementations ok = class_addMethod([Super class], @selector(superMethodNew2), (IMP)fn, NULL); testassert(ok); testassert(class_getMethodImplementation([Super class], @selector(superMethodNew2)) == (IMP)fn); testassert(class_getMethodImplementation([Sub class], @selector(superMethodNew2)) == (IMP)fn); // class_replaceMethod does add new implementations, // returning NULL if super has an implementation imp = class_replaceMethod([Sub2 class], @selector(superMethod), (IMP)fn, NULL); testassert(imp == NULL); testassert(class_getMethodImplementation([Sub2 class], @selector(superMethod)) == (IMP)fn); // class_replaceMethod does add new implementations, // returning NULL if super has no implementation imp = class_replaceMethod([Sub2 class], @selector(subMethodNew), (IMP)fn, NULL); testassert(imp == NULL); testassert(class_getMethodImplementation([Sub2 class], @selector(subMethodNew)) == (IMP)fn); // class_replaceMethod does add new implemetations // returning NULL if there is no super class imp = class_replaceMethod([Super class], @selector(superMethodNew), (IMP)fn, NULL); testassert(imp == NULL); testassert(class_getMethodImplementation([Super class], @selector(superMethodNew)) == (IMP)fn); // class_replaceMethod does replace existing implementations, // returning existing implementation (regardless of super) imp = class_replaceMethod([Sub2 class], @selector(subMethod), (IMP)fn, NULL); testassert(imp == subMethodFromSub2); testassert(class_getMethodImplementation([Sub2 class], @selector(subMethod)) == (IMP)fn); // class_replaceMethod does replace existing implemetations, // returning existing implementation (regardless of super) imp = class_replaceMethod([Sub2 class], @selector(bothMethod), (IMP)fn, NULL); testassert(imp == bothMethodFromSub2); testassert(class_getMethodImplementation([Sub2 class], @selector(bothMethod)) == (IMP)fn); // class_replaceMethod does replace existing implemetations, // returning existing implementation (regardless of super) imp = class_replaceMethod([Super class], @selector(superMethod), (IMP)fn, NULL); testassert(imp == superMethodFromSuper); testassert(class_getMethodImplementation([Super class], @selector(superMethod)) == (IMP)fn); // fixme actually try calling them succeed(__FILE__); }