Helper to gut a const/class in a spec to avoid having "expects" "never" on all methods

mocha_helper.rb

module MochaHelper
  def with_mocked_const(name, &block)
    original = Object.const_get(name)
    
    Object.instance_eval do 
      remove_const(name)
      const_set(name, Mocha::Mock.new(name))
    end
    
    yield
  ensure
    Object.instance_eval do
      remove_const(name)
      const_set(name, original)
    end
  end
end