How to check delegates asynchronously with Kiwi

Question

Guys, I’ve been trying for many years to find some good examples of how to use Kiwi testing to test delegation methods asynchronously.

I have a manager class that defines the protocols for testing, with the pass and fail method returned in the delegate. Can someone provide some sample code on how to do this? Can I make the test itself implement the method invocation method in the manager?

Thanks guys,

Answer 1

You can do as in the example

SPEC_BEGIN(IFStackOverflowRequestSpec) describe(@"IFStackOverflowRequestSpec", ^ { context(@"question request", ^ { __block IFViewController *controller = nil; beforeEach(^ { controller = [IFViewController mock]; }); it(@"should conform StackOverflowRequestDelegate protocol", ^ { [[controller should] conformToProtocol:@protocol(StackOverflowRequestDelegate)]; }); it(@"should recieve receivedJSON", ^ { NSString *questionsUrlString = @"http://api.stackoverflow.com/1.1/search?tagged=iphone&pagesize=20"; IFStackOverflowRequest *request = [[IFStackOverflowRequest alloc] initWithDelegate:controller urlString:questionsUrlString]; [[request fetchQestions] start]; [[[controller shouldEventuallyBeforeTimingOutAfter(3)] receive] receivedJSON:any()]; }); it(@"should recieve fetchFailedWithError", ^ { NSString *fakeUrl = @"asda"; IFStackOverflowRequest *request = [[IFStackOverflowRequest alloc] initWithDelegate:controller urlString:fakeUrl]; [[request fetchQestions] start]; [[[controller shouldEventuallyBeforeTimingOutAfter(1)] receive] fetchFailedWithError:any()]; }); }); }); 

A complete example can be based on this link.

Answer 2

You can do what I think you are trying to achieve by creating a mock object that stands for the delegate and then checking that the mock object receives the delegate responses you expect. Thus, the process will look like this:

• Create a mock object that matches the delegate protocol:

id delegateMock = [KWMock mockForProtocol:@protocol(YourProtocol)];

• set mock as a delegate of your manager class:

[manager setDelegate:delegateMock];

• create an object containing the data that will be returned by your manager class:

NSString *response = @"foo";

• establish a statement that the layout should be called using the method and the response object (in this case, I expect to get managerRepliedWithResponse and foo )

[[[delegateMock shouldEventually] receive] managerRepliedWithResponse:response];

• method call:

[manager performMyMethod];

The key sets the expected value before the method is called and uses shouldEventually , which delays the checked statement and gives the manager object time to execute the method.

There are a number of expectations you can also use that are listed on the Kiwi wiki - https://github.com/allending/Kiwi/wiki/Expectations

I wrote the process in more detail in a post on my site , although it is more specifically oriented to the situation I was dealing with.