Commits on Feb 13, 2018

1. Define respond_to_missing? on Mocha::Mock …

   Fixes freerange#321.
   
   As of Ruby 2.4, Forwardable warns when delegating to a private method.
   Warnings are shown when delegating methods to a Mocha::Mock.
   
   To determine whether to show a warning, Forwardable tests the delegated
   method with the defined? operator. Mocha uses method_missing to respond
   to mocked methods. defined? uses respond_to_missing? to determine
   whether or not a missing method is defined. Defining respond_to_missing?
   on Mocha::Mock, in place of respond_to?, prevents warnings from being
   shown.
   
   To preserve compatibility with Ruby 1.8.7, we continue to conditionally
   define respond_to?. Prior to Ruby 1.9.3, defined? returns nil for method
   calls handled via method_missing, so we also only test that mocked
   methods are defined? in later Ruby versions.

   

   tjvc committed Feb 13, 2018
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