WIP: Acceptance test for stubbing method implemented by method_missing

See #634.

test/acceptance/stubbing_method_implemented_by_method_missing_test.rb

@@ -0,0 +1,55 @@
+require File.expand_path('../acceptance_test_helper', __FILE__)
+
+class StubbingMethodImplementedByMethodMissingTest < Mocha::TestCase
+  include AcceptanceTest
+
+  def setup
+    setup_acceptance_test
+  end
+
+  def teardown
+    teardown_acceptance_test
+  end
+
+  def test_stubs_method_implemented_using_method_missing
+    object = Class.new do
+      def method_missing(symbol, *)
+        symbol == :foo ? :method_missing_value : super
+      end
+
+      def respond_to_missing?(symbol, *)
+        symbol == :foo
+      end
+    end.new
+    test_result = run_as_test do
+      object.stubs(:foo).returns(:stubbed_value)
+      assert_equal :stubbed_value, object.foo
+    end
+    assert_passed(test_result)
+  end
+
+  def test_stubs_method_implemented_using_method_missing_when_private_method_with_same_name_exists_on_superclass
+    superclass = Class.new do
+      def foo
+        :superclass_value
+      end
+      private :foo
+    end
+    object = Class.new(superclass) do
+      def method_missing(symbol, *)
+        symbol == :foo ? :method_missing_value : super
+      end
+
+      def respond_to_missing?(symbol, *)
+        symbol == :foo
+      end
+    end.new
+    test_result = run_as_test do
+      object.stubs(:foo).returns(:stubbed_value)
+      assert_equal :stubbed_value, object.foo
+      assert_equal :stubbed_value, object.public_send(:foo)
+      assert_equal :superclass_value, object.send(:foo)
+    end
+    assert_passed(test_result)
+  end
+end