如何验证方法被调用

Question

我想测试某个方法被调用以响应NSNotification接收

我已经试过这样：

_sut = mock([EAMainScreenViewController class]); 
[_sut view]; 
[[NSNotificationCenter defaultCenter]postNotificationName:kNotificationPushReceived object:[UIApplication sharedApplication].delegate userInfo:nil]; 
[verify(_sut) pushReceived:anything()]; 

而且我_sut viewDidLoad中看起来像这样

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(pushReceived:) name:kNotificationPushReceived object:[UIApplication sharedApplication].delegate]; 
} 

为什么我的测试不能期待1调用和接收0调用？

顺便说一句，如果我调试 - 调试程序停止在方法

Answer 1

您应该将测试重新写入下一个：

- (void)setUp { 
    _sut = [[EAMainScreenViewController alloc] <properInit>]; 
} 

- (void)tearDown { 
    //just in case 
    [[NSNotificationCenter defaultCenter] removeObserver:_sut]; 
} 

- (void)testThatNotificationPushReceived { 
    [_sut viewDidLoad]; 

    [[NSNotificationCenter defaultCenter] postNotificationName:kNotificationPushReceived object:<probably some mock> userInfo:nil]; 

    //test something that happens with your mock 
}