[#16769] how to ensure signature compliance while mocking in ruby

Date: 2008-01-02 15:56 Opener: James Mead

Submitted on behalf of Pradeep Gatram pradeep.gatram@gmail.com based on ruby-talk thread: http://groups.google.com/group/r...

require 'rubygems'
require 'mocha'
require 'test/unit'

class Foo

 def self.method1
   Bar.method2('param1', 'param2')
 end
 
end

class Bar

  def method2(param1)
  end
  
end

class FooTest < Test::Unit::TestCase
  
  def test_method1
   Bar.expects(:method2).with('param1', 'param2').once
   Foo.method1
  end

end

See http://pastie.textmate.org/133998 for syntax-highlighted version of code.

The above test should give some kind of warning when the expectation for Bar.method2 does not match the signature of the real Bar.method2 method i.e. the arity is different. This should be configurable so as not to upset TDD folk.