test.m

//
//  AppDelegateTests.m

#import <XCTest/XCTest.h>
#import "AppDelegate.h"
#import "User.h"

@interface AppDelegateTests : XCTestCase

@end

@implementation AppDelegateTests

- (void)testNonAppDelegate {
    User *user = [[User alloc] init];
    SEL facebookSelector = NSSelectorFromString(@"isFacebookVerified");

    XCTAssertTrue([user respondsToSelector:facebookSelector],
                  @"Did not respond to isFacebookVerified selector");
    XCTAssertFalse([user performSelector:facebookSelector]);
}

- (void)testAppDelegate {
    AppDelegate *delegate = [AppDelegate appDelegate];
    SEL aSelector = NSSelectorFromString(@"backdoorTest");

    XCTAssertTrue([delegate respondsToSelector:aSelector], 
                  @"Did not respond to backdoorTest selector");

    id result = [delegate performSelector:aSelector];
    XCTAssertEqual((int) result, YES, @"Did not get YES as expected");
}

@end