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

1 files changed, 18 insertions, 0 deletions

diff --git a/spec/rubyspec/core/string/freeze_spec.rb b/spec/rubyspec/core/string/freeze_spec.rb
new file mode 100644
index 0000000000..bd7c2fbc73
--- /dev/null
+++ b/spec/rubyspec/core/string/freeze_spec.rb
@@ -0,0 +1,18 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "String#freeze" do
+
+  it "produces the same object whenever called on an instance of a literal in the source" do
+    ids = Array.new(2) { "abc".freeze.object_id }
+    ids.first.should == ids.last
+  end
+
+  it "doesn't produce the same object for different instances of literals in the source" do
+    "abc".object_id.should_not == "abc".object_id
+  end
+
+  it "being a special form doesn't change the value of defined?" do
+    defined?("abc".freeze).should == "method"
+  end
+
+end