* test/ruby/test_encoding.rb (test_encoding): tests for r31362.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31364 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_encoding.rb

@@ -13,6 +13,7 @@ class TestEncoding < Test::Unit::TestCase
       assert_equal(e, Encoding.find(e.name.upcase))
       assert_equal(e, Encoding.find(e.name.capitalize))
       assert_equal(e, Encoding.find(e.name.downcase))
+      assert_equal(e, Encoding.find(e))
     end
   end