* ext/psych/lib/psych/visitors/to_ruby.rb: quoted "<<" strings

  should not be treated as merge keys.
* ext/psych/lib/psych/visitors/yaml_tree.rb: hashes with keys
  containing "<<" should roundtrip.
* test/psych/test_merge_keys.rb: test for change. Fixes GH #203

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47315 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/test/psych/test_merge_keys.rb b/test/psych/test_merge_keys.rb
index ba8d2e77b3..8b263e5186 100644
--- a/test/psych/test_merge_keys.rb
+++ b/test/psych/test_merge_keys.rb
@@ -6,6 +6,26 @@ module Psych
       attr_reader :bar
     end
 
+    def test_roundtrip_with_chevron_key
+      h = {}
+      v = { 'a' => h, '<<' => h }
+      assert_cycle v
+    end
+
+    def test_explicit_string
+      doc = Psych.load <<-eoyml
+a: &me { hello: world }
+b: { !!str '<<': *me }
+eoyml
+      expected = {
+        "a" => { "hello" => "world" },
+        "b" => {
+          "<<" => { "hello" => "world" }
+        }
+      }
+      assert_equal expected, doc
+    end
+
     def test_mergekey_with_object
       s = <<-eoyml
 foo: &foo