repository: switch darcs cat test if cat supports.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4608 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/repository_darcs_test.rb

@@ -56,11 +56,13 @@ class RepositoryDarcsTest < ActiveSupport::TestCase
     end
 
     def test_cat
+      if @repository.scm.supports_cat?
         @repository.fetch_changesets
         cat = @repository.cat("sources/welcome_controller.rb", 2)
         assert_not_nil cat
         assert cat.include?('class WelcomeController < ApplicationController')
       end
+    end
   else
     puts "Darcs test repository NOT FOUND. Skipping unit tests !!!"
     def test_fake; assert true end