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, 38 insertions, 0 deletions

diff --git a/spec/rubyspec/library/openstruct/frozen_spec.rb b/spec/rubyspec/library/openstruct/frozen_spec.rb
new file mode 100644
index 0000000000..26dd556e97
--- /dev/null
+++ b/spec/rubyspec/library/openstruct/frozen_spec.rb
@@ -0,0 +1,38 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'ostruct'
+
+describe "OpenStruct.new when frozen" do
+  before :each do
+    @os = OpenStruct.new(name: "John Smith", age: 70, pension: 300).freeze
+  end
+  #
+  # method_missing case handled in method_missing_spec.rb
+  #
+  it "is still readable" do
+    @os.age.should eql(70)
+    @os.pension.should eql(300)
+    @os.name.should == "John Smith"
+  end
+
+  it "is not writeable" do
+    lambda{ @os.age = 42 }.should raise_error( RuntimeError )
+  end
+
+  it "cannot create new fields" do
+    lambda{ @os.state = :new }.should raise_error( RuntimeError )
+  end
+
+  it "creates a frozen clone" do
+    f = @os.clone
+    f.age.should == 70
+    lambda{ f.age = 0 }.should raise_error( RuntimeError )
+    lambda{ f.state = :newer }.should raise_error( RuntimeError )
+  end
+
+  it "creates an unfrozen dup" do
+    d = @os.dup
+    d.age.should == 70
+    d.age = 42
+    d.age.should == 42
+  end
+end