Add test for Forwardable#def_delegator with r55366.

  Patch by @aycabta
  [Bug #12837][ruby-core:77611]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62153 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/test_forwardable.rb b/test/test_forwardable.rb
index e48dbfe18f..b3f8467c5c 100644
--- a/test/test_forwardable.rb
+++ b/test/test_forwardable.rb
@@ -296,6 +296,14 @@ class TestForwardable < Test::Unit::TestCase
     end
   end
 
+  def test_non_module
+    str = String.new
+    str.extend Forwardable
+    str.instance_variable_set("@h", 42)
+    str.def_delegator("@h", :to_s, :forty_two)
+    assert_equal("42", str.forty_two)
+  end
+
   private
 
   def forwardable_class(