* test/with_diffent_ofs.rb (DifferentOFS): test suite for test

suites affected by $,.
* test/digest/test_digest_extend.rb (TestDigestExtend): should not
  assume $, invariant.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30367 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/csv/base.rb

@@ -2,19 +2,8 @@ require "test/unit"
 
 require "csv"
 
-class TestCSV < Test::Unit::TestCase
-  module DifferentOFS
-    def setup
-      super
-      @ofs, $, = $,, "-"
-    end
-    def teardown
-      $, = @ofs
-      super
-    end
-  end
+require_relative "../with_diffent_ofs.rb"
 
-  def self.with_diffrent_ofs
-    const_set(:DifferentOFS, Class.new(self).class_eval {include DifferentOFS}).name
-  end
+class TestCSV < Test::Unit::TestCase
+  include DifferentOFS
 end