* test/ruby/envutil.rb (Test::Unit::Assersions#assert_warn):

  new assersion to assert that a particular warning message is 
  displayed.
  forwardport from branches/ruby_1_9_2@29795.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29812 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/test/ruby/envutil.rb b/test/ruby/envutil.rb
index 8d7a1eef24..7b235106cb 100644
--- a/test/ruby/envutil.rb
+++ b/test/ruby/envutil.rb
@@ -173,6 +173,11 @@ module Test
         assert(status.success?, m)
       end
 
+      def assert_warn(msg)
+        stderr = EnvUtil.verbose_warning { yield }
+        assert(msg === stderr, "warning message #{stderr.inspect} is expected to match #{msg.inspect}")
+      end
+
     end
   end
 end