# File test/test_params.rb, line 1120
    def test_invalid_virtual_host
      @store['aliases'] = [
        { 'alias_path' => '/foo',
          'orig_path' => '/foo.rb',
          'virtual_host' => nil
        }
      ]
      @alias_list.load(self)
      assert_equal('/foo', @alias_list[0].alias_path)
      assert_equal('/foo.rb', @alias_list[0].orig_path)
      assert_equal(nil, @alias_list[0].virtual_host)

      @alias_list[0].virtual_host = nil # allowed
      assert_exception(RuntimeError) {
        @alias_list[0].virtual_host = 123
      }
      assert_exception(RuntimeError) {
        @alias_list[0].virtual_host = false
      }
    end