[MacRuby-devel] macruby rspec mock odd behavior

Joshua Ballanco jballanc at gmail.com
Fri May 6 07:26:53 PDT 2011

Hi Gabriel,

So, you've stumbled across a bit of a confusing "feature" of MacRuby and interaction with Obj-C. The full method name of the Obj-C method, as Ruby sees it, is actually "buildRequestWithUrl:method:header:body:", since this is the selector. So, I think your mock should work if you simply modify it as follows:

 .with("http://example.com", method: "POST", header: nil, body: anything() )

Please let us know if that doesn't work!


On Wednesday, May 4, 2011 at 4:16 PM, Gabriel Ayuso wrote: 
> Hi,
> I'm having some strange issue with rspec mocks and hope someone can point out what I'm doing wrong.
> I have a Objective C class with the method: buildRequestWithUrl:method:header:body:
> I wrote an rspec mock for this class. I'm setting up an expectation as follows:
> @requestBuilder.should_receive(:buildRequestWithUrl)
> .with("http://example.com", method:"POST", header:nil, body:anything() )
>  .and_return(nil)
> When the class being tested calls the aforementioned method I get the following error:
> RuntimeError:
>  NSInvalidArgumentException: -[Mock buildRequestWithUrl:method:header:body:]: unrecognized selector sent to instance 0x200373ea0
> I set the expectations for another method of the same class called :queryStringForDictionary
> In this case the expectation and call do work. 
> @requestBuilder.should_receive(:queryStringForDictionary).and_return( body )
> In another project I'm calling the same class from ruby code and there the mocks and expectations do work properly. In this Objective C project they don't. 
> Thanks in advance,
> Gabriel Ayuso
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> MacRuby-devel at lists.macosforge.org
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