File: stub_instance_method_defined_on_module_test.rb

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require File.expand_path('../acceptance_test_helper', __FILE__)

class StubInstanceMethodDefinedOnModuleTest < Mocha::TestCase
  include AcceptanceTest

  def setup
    setup_acceptance_test
  end

  def teardown
    teardown_acceptance_test
  end

  def test_should_stub_public_method_and_leave_it_unchanged_after_test
    mod = Module.new do
      def my_module_method
        :original_return_value
      end
      public :my_module_method
    end
    instance = Class.new do
      include mod
    end.new
    assert_snapshot_unchanged(instance) do
      test_result = run_as_test do
        instance.stubs(:my_module_method).returns(:new_return_value)
        assert_method_visibility instance, :my_module_method, :public
        assert_equal :new_return_value, instance.my_module_method
      end
      assert_passed(test_result)
    end
    assert_equal :original_return_value, instance.my_module_method
  end

  def test_should_stub_protected_method_and_leave_it_unchanged_after_test
    mod = Module.new do
      def my_module_method
        :original_return_value
      end
      protected :my_module_method
    end
    instance = Class.new do
      include mod
    end.new
    assert_snapshot_unchanged(instance) do
      test_result = run_as_test do
        instance.stubs(:my_module_method).returns(:new_return_value)
        assert_method_visibility instance, :my_module_method, :protected
        assert_equal :new_return_value, instance.send(:my_module_method)
      end
      assert_passed(test_result)
    end
    assert_equal :original_return_value, instance.send(:my_module_method)
  end

  def test_should_stub_private_method_and_leave_it_unchanged_after_test
    mod = Module.new do
      def my_module_method
        :original_return_value
      end
      private :my_module_method
    end
    instance = Class.new do
      include mod
    end.new
    assert_snapshot_unchanged(instance) do
      test_result = run_as_test do
        instance.stubs(:my_module_method).returns(:new_return_value)
        assert_method_visibility instance, :my_module_method, :private
        assert_equal :new_return_value, instance.send(:my_module_method)
      end
      assert_passed(test_result)
    end
    assert_equal :original_return_value, instance.send(:my_module_method)
  end
end