Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/rubyspec/core/unboundmethod/owner_spec.rb

@@ -0,0 +1,26 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "UnboundMethod#owner" do
+  it "returns the owner of the method" do
+    String.instance_method(:upcase).owner.should == String
+  end
+
+  it "returns the same owner when aliased in the same classes" do
+    UnboundMethodSpecs::Methods.instance_method(:foo).owner.should == UnboundMethodSpecs::Methods
+    UnboundMethodSpecs::Methods.instance_method(:bar).owner.should == UnboundMethodSpecs::Methods
+  end
+
+  it "returns the class/module it was defined in" do
+    UnboundMethodSpecs::C.instance_method(:baz).owner.should == UnboundMethodSpecs::A
+    UnboundMethodSpecs::Methods.instance_method(:from_mod).owner.should == UnboundMethodSpecs::Mod
+  end
+
+  it "returns the new owner for aliased methods on singleton classes" do
+    parent_singleton_class = UnboundMethodSpecs::Parent.singleton_class
+    child_singleton_class  = UnboundMethodSpecs::Child3.singleton_class
+
+    child_singleton_class.instance_method(:class_method).owner.should == parent_singleton_class
+    child_singleton_class.instance_method(:another_class_method).owner.should == child_singleton_class
+  end
+end