Silence warning: instance variable @segment not initialized

actionpack/test/controller/routing_test.rb

@@ -107,7 +107,11 @@ def test_regexp_chunk_should_add_question_mark_for_optionals
   end
 end
 
-class DynamicSegmentTest < Test::Unit::TestCase
+class DynamicSegmentTest < ActiveSupport::TestCase
+  def setup
+    @segment = nil
+  end
+
   def segment(options = {})
     unless @segment
       @segment = ROUTING::DynamicSegment.new(:a, options)
@@ -341,7 +345,11 @@ def test_regexp_should_only_match_possible_controllers
   end
 end
 
-class PathSegmentTest < Test::Unit::TestCase
+class PathSegmentTest < ActiveSupport::TestCase
+  def setup
+    @segment = nil
+  end
+
   def segment(options = {})
     unless @segment
       @segment = ROUTING::PathSegment.new(:path, options)
@@ -754,7 +762,7 @@ def setup
 
     ActionController::Routing.use_controllers! %w(content admin/user admin/news_feed)
   end
-  
+
   def teardown
     @rs.clear!
   end
@@ -2564,10 +2572,10 @@ def test_load_with_configuration
 
     routes.reload
   end
-  
+
   def test_load_multiple_configurations
     routes.add_configuration_file("engines.rb")
-    
+
     File.expects(:stat).at_least_once.returns(@stat)
 
     routes.expects(:load).with('./config/routes.rb')