# File test/test_params.rb, line 2387
    def test_save_with_invalid_path
      @store['filters'] = [
        { 'filter' => nil,
          'arguments' => {},
          'attach_path' => nil,
          'attach_mask' => nil,
          'virtual_host' => nil,
          'comment' => nil
        }
      ]
      @filter_list.load(@properties)
      @filter_list[0].name = 'Foo'
      @filter_list[0].set_arg_at(0, 'apple')
      @filter_list[0].set_arg_at(1, /banana/)
      @filter_list[0].path = 'foo' # invalid path!
      @filter_list[0].mask = %r"\.html($|/)"
      @filter_list[0].virtual_host = 'www.foo.org'
      @filter_list[0].comment = 'test'
      assert_exception(RuntimeError) { @filter_list.save(@properties) }
    end