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我正在为围绕ASIHTTPRequest编写的包装类编写测试用例。由于我无法确定的原因，我的测试用例在 ASIHTTPRequest 完成之前以失败告终。

以下是程序流程的工作方式。

  1. 从我的测试用例开始。
  2. 初始化我的 http 引擎对象，指示它创建一个新列表
  3. 创建新的 ASIHTTPRequest 对象并进行设置。
  4. 将请求添加到操作队列。
  5. 等到该队列为空
  6. 检查是否调用了我的委托方法，如果没有调用，则测试失败。

现在，大多数时候一切正常并且测试通过，但有时它失败了，因为在操作队列将控制权返回给我的等待方法之后调用了我的委托方法。

测试用例

// Set my flags to 'NO'
- (void)setUp {
    requestDidFinish = NO;
    requestDidFail = NO;
}

- (void)testCreateList {
    NSString *testList = @"{\"title\": \"This is a list\"}";

    JKEngine *engine = [[JKEngine alloc] initWithDelegate:self];
    NSString *requestIdentifier = [engine createList:jsonString];

    [self waitUntilEngineDone:engine];
    NSString *responseString = responseString_;
    [engine release];

    GHAssertNotNil(requestIdentifier, nil);
    GHAssertTrue(requestDidFinish, nil);
    GHAssertTrue([responseString hasPrefix:@"{\"CreateOrEditListResult\""], nil);

}

// Puts the test into a holding pattern until the http request is done
- (void)waitUntilEngineDone:(JKEngine *)engine {
    [engine waitUntilFinishedRunning]; 
}

// The delegate method called on successful completion
- (void)requestFinished:(NSString *)requestIdentifier withResponse:(NSString *)response {
    NSLog(@"request did finish");
    requestDidFinish = YES;
    responseIdentifier_ = [requestIdentifier retain];
    responseString_ = [response retain];
}

引擎代码

- (NSString *)createList:(NSString *)list {
    ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:[NSURL URLWithString:url]];
    [request addRequestHeader:@"Content-Type" value:kContentType];
    [request setRequestMethod:kPOST];
    request.delegate = self;

    [request appendPostData:[list dataUsingEncoding:NSUTF8StringEncoding]];

    NSString *requestIdentifier = [NSString stringWithNewUUID];

    [operationQueue_ addOperation:request];
    [operationDictionary_ setObject:request forKey:requestIdentifier];

    return requestIdentifier;
}

// This is the ASIHTTPRequest delegate method that's called on success
//   but it sometimes isn't called until AFTER the operationQueue finishes running
- (void)requestFinished:(ASIHTTPRequest *)request {
    DLog([request responseString]);

    BOOL canNotifiyDelegate = [self.delegate respondsToSelector:@selector(requestFinished:withResponse:)];
    if (canNotifiyDelegate) {
        NSArray *keyArray = [operationDictionary_ allKeysForObject:request];
        NSString *requestIdentifier = [keyArray objectAtIndex:0];
        [operationDictionary_ removeObjectForKey:requestIdentifier];

        if ([keyArray count] != 1) {
            ALog(@"It looks like a request was added to the operation dictionary multiple times. There's a bug somewhere.", nil);
        }

        [self.delegate requestFinished:requestIdentifier withResponse:[request responseString]];
    }
}

- (void)waitUntilFinishedRunning {
    [operationQueue_ waitUntilAllOperationsAreFinished];
}
4

2 回答 2

1

这就是 ASIHTTPRequest 的工作方式。委托方法在主线程上调用，并且对委托的调用不会阻塞请求线程，因此很有可能在队列完成后调用您的委托。

于 2010-07-25T09:35:41.773 回答
0

ASIHTTPRequest在主线程上调用委托方法，默认情况下GH-Unit在后台线程上运行其测试。我仍然对到底发生了什么有点模糊，但是强制我的网络测试在主线程上运行解决了这个问题。

我在我的网络测试类中实现了以下方法。

- (BOOL)shouldRunOnMainThread { 
    return YES;
}
于 2010-07-26T11:01:34.123 回答