iOS中异步函数的单元测试

转载自：http://blog.csdn.net/diyagoanyhacker/article/details/8540239

通常单元测试执行顺序执行后进程就退出了，对于异步函数（如：网络访问等）的测试比较麻烦。在iOS开发中可以利用Runloop来阻塞主线程，在回调函数中做断言。

代码片段如下，完整Demo

//
// SampleTest.m
// SampleTest
//
// Created by Magic Yang on 5/11/12.
// Copyright (c) 2012 Baidu. All rights reserved.
//

#import "SampleTest.h"

@implementation SampleTest
{
int statusCode;
}
- (void)setUp
{
[super setUp];

statusCode = -1;
}

- (void)tearDown
{
// Tear-down code here.

[super tearDown];
}

- (void)testExample
{
NetworkHelper *helper = [[NetworkHelper alloc] initWithDelegate:self];
[helper getStatusCodeForSite:@"http://www.baidu.com"];
NSLog(@"------------------ Waiting ------------------");
CFRunLoopRun();
STAssertTrue(statusCode == 200, @"Can not access this site");
NSLog(@"------------------ Finished ------------------");
}

- (void)succeedGotStatusCode:(int)code
{
statusCode = code;
CFRunLoopRef runLoopRef = CFRunLoopGetCurrent();
CFRunLoopStop(runLoopRef);
}

- (void)failedGotStatusCodeWithError:(NSError *)error
{
// ...
}

@end