我在测试一些使用通知的逻辑时遇到了困难。我已经阅读了有关强制NSNotifications发送特定内容的信息,但这并不能真正解决我所看到的问题。
[SomeObject PerformAsyncOperation]创建一个NSURLRequest并将自己设置为响应委托。根据响应的内容,将SomeObject成功或失败发布NSNotification到默认值NSNotificationCenter。
我的测试的问题是,在PerformAsyncOperation调用之后,测试不会等待发送响应。相反,它继续断言 - 失败,因为请求/响应没有时间发送/接收/解析。
这是代码:
-(void)testMethod {
SomeObject *x = [[SomeObject alloc] init];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(success:)
name:SomeObjectSuccess
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(failure:)
name:SomeObjectFailure
object:nil];
operationCompleted = false; // declared in .h
[x PerformAsyncOperation:@"parameter"];
STAssertTrue(operationCompleted , @"Operation has completed.");
[[NSNotificationCenter defaultCenter] removeObserver:self name:SomeObjectSuccess object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:SomeObjectFailure object:nil];
[x release];
}
-(void) failure:(NSNotification *) notification {
operationCompleted = true;
NSLog(@"Received failure message.");
}
-(void) success:(NSNotification *) notification {
operationCompleted = true;
NSLog(@"Received success message.");
}
我已经尝试在调用后使线程休眠PerformAsyncOperation,以及一个空while (!operationCompleted)循环。两者都不起作用 - 休眠线程仍然使断言失败,并且 while 循环永远不会退出。我也尝试将断言移入success:and failure:,但是因为 OCUnit 期望每个方法都是测试方法,所以它只是立即执行所有三个方法并退出(不等待NSURLRequest' 的响应,这就是练习的重点! )。
任何想法或见解将不胜感激。谢谢!