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Question

模擬對象，我需要用以下幫助：考察一個方法參數：我​​在寫一些BDD測試一個客戶端API結構如下：

@protocol MyAPIClientDelegate <NSObject> 
    -(void)myCallbackMethod:(id)response; 
@end 

// BEGIN: MyAPIClientSpec.h 

SPEC_BEGIN(MyAPIClientSpec) 

describe(@"MyAPIClientAPI ", ^{ 
    __block MyAPI *api = nil; 
    __block id delegateMock = nil; 

    beforeEach(^{ 
     delegateMock = [KWMock mockForProtocol:@protocol(MyAPIClientDelegate)]; 
     api = [MyAPI APIClientWithDelegate:delegateMock]; 
    }); 

    afterEach(^{ 
     delegateMock = nil; 
     api = nil; 
    }); 

    it(@"should return a JSON { result: 'ok', token: <SOME_TOKEN> }", ^{ 
     [[api should] receive:@selector(myMethodCall:)]; 

     [[[delegateMock shouldEventually] receive] myCallbackMethod:any()]; 

     [api myMethodCall]; 
    }); 
}); 

SPEC_END 

正如你可以在代碼中看到上面，我使用any（）來檢查至少有一個參數發送給委託。

有無論如何定義一個函數（或objective-c塊）來檢查參數嗎？

謝謝！

Answer 1

嘗試使用capture spy：

it(@"should return a JSON { result: 'ok', token: <SOME_TOKEN> }", ^{ 
    [[api should] receive:@selector(myMethodCall:)]; 

    KWCaptureSpy *spy = [delegateMock captureArgument:@selector(myCallbackMethod:) atIndex:0]; 

    [api myMethodCall]; 

    [[spy.argument should] equal:/* ... */]; 
});