     @_args = []
     @_returns = undefined
     @_throws = undefined
-    @called = false
+    @_called = false
     @_install_mock_method()
     all_expectations.push(@)
 

  throw new Error( errors ) unless errors == ""

build_all_errors = ->
  (build_not_called_error(expectation) for expectation in all_expectations when not expectation.called).join("")

build_not_called_error = (expectation) ->
  "'#{expectation._method_name}(#{expectation._args})' was never called\n"

    expectation = find_expectation(@, method_name, args...)
    throw_unknown_expectation("#{method_name}(#{args})") unless expectation?
    check_for_duplicate_expectations()
    expectation._called = yes
    throw expectation._throws if expectation._throws?
    expectation._returns

