如何验证方法被调用

Question

我想测试某个方法被调用以响应收到的NSNotification

我试过这个：

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

我的_sut viewDidLoad看起来像这样

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

为什么我的测试无法期待1次调用，并且接收0次调用？

btw，如果我调试 - 调试器确实停在方法

Answer 1

您应该将测试重新编写到下一个：

- (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
}