any_instance is supported when a class overrides Object#method

* Fixes #180
* Closes #181

Changelog.md

@@ -5,6 +5,8 @@ Bug fixes
 
 * Fix `:transfer_nested_constants` option of `stub_const` so that it
   doesn't blow up when there are inherited constants. (Myron Marston)
+* `any_instance` stubs can be used on classes that override `Object#method`.
+  (Andy Lindeman)
 
 Deprecations:
 

lib/rspec/mocks/any_instance/recorder.rb

@@ -175,7 +175,7 @@ def observe!(method_name)
           backup_method!(method_name)
           @klass.class_eval(<<-EOM, __FILE__, __LINE__)
             def #{method_name}(*args, &blk)
-              klass = self.method(:#{method_name}).owner
+              klass = ::Object.instance_method(:method).bind(self).call(:#{method_name}).owner
               klass.__recorder.playback!(self, :#{method_name})
               self.__send__(:#{method_name}, *args, &blk)
             end
@@ -187,7 +187,7 @@ def mark_invoked!(method_name)
           @klass.class_eval(<<-EOM, __FILE__, __LINE__)
             def #{method_name}(*args, &blk)
               method_name = :#{method_name}
-              klass = self.method(:#{method_name}).owner
+              klass = ::Object.instance_method(:method).bind(self).call(:#{method_name}).owner
               invoked_instance = klass.__recorder.instance_that_received(method_name)
               raise RSpec::Mocks::MockExpectationError, "The message '#{method_name}' was received by \#{self.inspect} but has already been received by \#{invoked_instance}"
             end

spec/rspec/mocks/any_instance_spec.rb

@@ -845,6 +845,20 @@ class RSpec::SampleRspecTestClass;end
           end.to raise_error(RSpec::Mocks::MockExpectationError, "The message 'existing_method' was received by #{instance_two.inspect} but has already been received by #{instance_one.inspect}")
         end
       end
+
+      context "when a class overrides Object#method" do
+        let(:http_request_class) { Struct.new(:method, :uri) }
+
+        it "stubs the method correctly" do
+          http_request_class.any_instance.stub(:existing_method).and_return("foo")
+          http_request_class.new.existing_method.should == "foo"
+        end
+
+        it "mocks the method correctly" do
+          http_request_class.any_instance.should_receive(:existing_method).and_return("foo")
+          http_request_class.new.existing_method.should == "foo"
+        end
+      end
     end
   end
 end