* lib/test/unit.rb: warn when test_* method is redefined.

  Patch by mame (Yusuke Endoh). [Feature #2643] [ruby-core:27790]

* test/testunit/test_redefinition.rb: Test for above.

* test/testunit/test4test_redefinition.rb: Ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36484 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/test/unit/testcase.rb b/lib/test/unit/testcase.rb
index 02f0f97987..11f34b6f51 100644
--- a/lib/test/unit/testcase.rb
+++ b/lib/test/unit/testcase.rb
@@ -20,6 +20,17 @@ module Test
       def self.test_order
         :sorted
       end
+
+      Methods = {}
+
+      def self.method_added(name)
+       return unless name.to_s[/\Atest_/]
+       Methods[self] ||= {}
+       if Methods[self][name]
+         warn("test/unit warning: method #{ self }##{ name } is redefined")
+       end
+       Methods[self][name] = true
+      end
     end
   end
 end