push_helper.rb

 class SandboxedTestCase < TestCase
    def setup
      @remote_repo = sandbox_init('testrepo.git')
      @repo = sandbox_clone(@remote_repo)
    end
 
    def teardown
      FileUtils.remove_entry_secure(@remote_repo.path)
      FileUtils.remove_entry_secure(@repo.path)
    end
 
    def sandbox_init(repo)
      dir = Dir.mktmpdir 'dir'
      repo_dir = File.join(TestCase::TEST_DIR, (File.join('fixtures', repo, '.')))
      `git clone --bare #{repo_dir} #{dir}`
      Rugged::Repository.new(dir)
    end
 
    def sandbox_clone(repository)
      dir = Dir.mktmpdir 'dir'
      `git clone #{repository.path} #{dir}`
 
      Rugged::Repository.new(dir)
    end
  end