How to Mock AFNetworking Requests

Occasionally, you may need to mock AFNetworking responses to test your response handling code. You can mock these in XCTestCases by setting up a category to return a response file when a network request is made.

1. Import the BOURLProtocol header and implementation files into your XCTest target.
2. Register a special protocol in your XCTestCase.
3. Stub a path in your XCTestCase and pass it the response that you want your request to return.
4. Add a small artificial delay to wait for the request to finish (AFNetworking requests are typically asynchronous).
5. Unregister your special protocol.

Example TestCase

1. #import "BOURLProtocol.h"
3. @implementation TestCase
5. - (void)testSomething
6. {
7. [BOURLProtocol registerSpecialProtocol];
8. [BOURLProtocol stubPath:@"URL_Path" load:[[NSBundle bundleForClass:[self class]] URLForResource:@"ResponseSuccess"
9. withExtension:@"json"]];
11. // Do something that requires a network request
13. // Delay since AFNetworking makes asynchronous requests
14. NSDate *until = [NSDate dateWithTimeIntervalSinceNow:0.5];
15. while ([until timeIntervalSinceNow] > 0)
16. {
17. [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
18. beforeDate:until];
19. }
21. // Verify expected behavior
23. [BOURLProtocol unregisterSpecialProtocol];
24. }
25. @end

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