study_objc4/objc4-779.1/test/createInstance.m

// TEST_CONFIG

#import <objc/runtime.h>
#import <objc/objc-auto.h>
#include "test.h"
#include "testroot.i"

@interface Super : TestRoot @end
@implementation Super @end

@interface Sub : Super { int array[128]; } @end
@implementation Sub @end

#if __has_feature(objc_arc)
#define object_dispose(x) do {} while (0)
#endif

int main()
{
    Super *s;

    s = class_createInstance([Super class], 0);
    testassert(s);
    testassert(object_getClass(s) == [Super class]);
    testassert(malloc_size((__bridge const void *)s) >= class_getInstanceSize([Super class]));

    object_dispose(s);

    s = class_createInstance([Sub class], 0);
    testassert(s);
    testassert(object_getClass(s) == [Sub class]);
    testassert(malloc_size((__bridge const void *)s) >= class_getInstanceSize([Sub class]));

    object_dispose(s);

    s = class_createInstance([Super class], 100);
    testassert(s);
    testassert(object_getClass(s) == [Super class]);
    testassert(malloc_size((__bridge const void *)s) >= class_getInstanceSize([Super class]) + 100);

    object_dispose(s);

    s = class_createInstance([Sub class], 100);
    testassert(s);
    testassert(object_getClass(s) == [Sub class]);
    testassert(malloc_size((__bridge const void *)s) >= class_getInstanceSize([Sub class]) + 100);

    object_dispose(s);

    s = class_createInstance(Nil, 0);
    testassert(!s);

    testassert(TestRootAlloc == 0);

#if __has_feature(objc_arc)
    // ARC version didn't use object_dispose() 
    // and should have called -dealloc on 4 objects
    testassert(TestRootDealloc == 4);
#else
    // MRC version used object_dispose()
    // which doesn't call -dealloc
    testassert(TestRootDealloc == 0);
#endif
    
    succeed(__FILE__);
}