# File test/test_params.rb, line 1714
    def test_push
      @store['filters'] = [
        { 'filter' => 'Foo',
          'arguments' => [ 'foo', 'bar' ],
          'attach_path' => '/attach_path',
          'attach_mask' => /attach_mask/,
          'virtual_host' => 'www.foo.org',
          'comment' => "Comment.\n"
        }
      ]
      @filter_list.load(self)
      assert_equal(1, @filter_list.length)
      @filter_list[1] = Hash.new
      assert_equal(2, @filter_list.length)
      assert_equal(nil, @filter_list[1]['filter'])
      assert_equal([], @filter_list[1]['arguments'])
      assert_equal(nil, @filter_list[1]['attach_path'])
      assert_equal(nil, @filter_list[1]['attach_mask'])
      assert_equal(nil, @filter_list[1]['virtual_host'])
      assert_equal(nil, @filter_list[1]['comment'])
    end