Unit testing NSURLConnectionDelegate method

Question

I want to test a method which makes URL request. When response is received in NSURLConnectionDelegate method I save the response. The logic I really want to test is whether response was saved or not.

How to test NSURLConnectionDelegate method?

Method I want to test :

- (void) getProfilePictureURL :(NSString *)fbId
{
    //to get picture URL
    NSString *urlString = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=large", fbId];
    NSURL *url = [NSURL URLWithString:urlString];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

    if (!connection)
    {
        NSLog(@"error while starting the connection");
    }
} 

// NSURLConnectionDelegate method
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    // Save response in user defaults
}

check if the response is saved in userdefault or not?? thats where you can identify that data is saved. — Armaan Stranger, Aug 22 '13 at 08:47
I know that but I can test it only after connection delegate is called and code is executed. How do I check that delegate is called? — Geek, Aug 22 '13 at 08:49
sorry but i can't understand your scenario. you want to check it before saving response or after saving response ?? — Armaan Stranger, Aug 22 '13 at 08:52
Obviously after saving response. But I have to wait until connection delegate is called. Then only I can test. — Geek, Aug 22 '13 at 09:02
obviously. delegate methods saves the data in userdefault then you need to check it there. otherwise there will be no data before that delegate method is called. — Armaan Stranger, Aug 22 '13 at 09:11
In unit testing how do I check when delegate method is called? — Geek, Aug 22 '13 at 09:19
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/35983/discussion-between-akash-and-armaan-stranger) — Geek, Aug 22 '13 at 09:32

score 0 · Answer 1 · answered Aug 22 '13 at 10:13

0

The NSURLConnection class does not have any methods of its own to return the http response code so treats a 404 as a successful response - which I suppose it is as a connection was made and something (the 404 page) was returned.

The trick to see if the response was a 200 OK or 404 NOT FOUND is to cast the NSURLResponse to a NSHTTPURLResponse and then use that classes methods to look for the http response code.

Note: If the connection was made the delegate will be called definitely. You should just check if the connection is not made, then what you should be doing.

answered Aug 22 '13 at 10:13

anky_believeMe

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I have some code in delegate method and I want to test that code. So I can test only once delegate is called and code is executed. – Geek Aug 22 '13 at 10:37
So that is the question that how to do it? means HOW TO WAIT for delegate to be called? – Geek Aug 22 '13 at 10:44
You dont have to wait for it to be called. As soon as you request for a connection it will automatically go in those delegate functions even if there is no internet connection. – anky_believeMe Aug 22 '13 at 10:50
Also make sure you have added `NSURLConnectionDelegate` in your header file. – anky_believeMe Aug 22 '13 at 10:53
It takes a second to call delegate and before that my test method gets executed. – Geek Aug 22 '13 at 10:59
Is your delegate method getting called.? Did you check.? – anky_believeMe Aug 22 '13 at 11:08
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/35994/discussion-between-akash-and-believe-anky) – Geek Aug 22 '13 at 11:15

Unit testing NSURLConnectionDelegate method

1 Answers1