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