# File test/test_EditProperties.rb, line 337
    def test_mount_mask_string_empty
      assert_equal('1', @EditProperties.document_position)
      assert_equal('LocalFile', @EditProperties.document_type)
      assert_equal('nil', @EditProperties.doc_mask_type_selected)
      assert_nil(@EditProperties.doc_mask)
      @EditProperties.doc_mask_type_selected = 'string'
      assert_equal('string', @EditProperties.doc_mask_type_selected)
      @EditProperties.doc_mask = nil
      assert_nil(@EditProperties.doc_mask)
      @EditProperties.write_properties
      assert_equal(1, @write_document_list_call)
      assert_equal(3, @document_list.length)
      assert_equal('index.html', @document_list[0]['mount_mask'])
      assert_equal('', @document_list[1]['mount_mask'])
      assert_nil(@document_list[2]['mount_mask'])
    end