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, 29 insertions, 0 deletions

diff --git a/spec/rubyspec/language/predefined/data_spec.rb b/spec/rubyspec/language/predefined/data_spec.rb
new file mode 100644
index 0000000000..f616879527
--- /dev/null
+++ b/spec/rubyspec/language/predefined/data_spec.rb
@@ -0,0 +1,29 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "The DATA constant" do
+  it "exists when the main script contains __END__" do
+    ruby_exe(fixture(__FILE__, "data1.rb")).chomp.should == "true"
+  end
+
+  it "does not exist when the main script contains no __END__" do
+    ruby_exe("puts Object.const_defined?(:DATA)").chomp.should == 'false'
+  end
+
+  it "does not exist when an included file has a __END__" do
+    ruby_exe(fixture(__FILE__, "data2.rb")).chomp.should == "false"
+  end
+
+  it "does not change when an included files also has a __END__" do
+    ruby_exe(fixture(__FILE__, "data3.rb")).chomp.should == "data 3"
+  end
+
+  it "is included in an otherwise empty file" do
+    ap = fixture(__FILE__, "print_data.rb")
+    str = ruby_exe(fixture(__FILE__, "data_only.rb"), options: "-r#{ap}")
+    str.chomp.should == "data only"
+  end
+
+  it "rewinds to the head of the main script" do
+    ruby_exe(fixture(__FILE__, "data5.rb")).chomp.should == "DATA.rewind"
+  end
+end