Added run time fix for the test/unit problems with Ruby 1.8.2

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@360 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/std_ext/test_unit_ext.rb

@@ -0,0 +1,24 @@
+# Bug fix for using Ruby 1.8.2 and Rake together to run tests.
+require 'test/unit'
+
+module Test
+  module Unit
+    module Collector
+      class Dir
+        def collect_file(name, suites, already_gathered)
+          dir = File.dirname(File.expand_path(name))
+          $:.unshift(dir) unless $:.first == dir
+          if(@req)
+            @req.require(name)
+          else
+            require(name)
+          end
+          find_test_cases(already_gathered).each{|t| add_suite(suites, t.suite)}
+        rescue LoadError, SystemExit
+        ensure
+          $:.delete_at $:.rindex(dir)
+        end
+      end
+    end
+  end
+end