text: /**
   * @license
   * Copyright 2016 Google Inc. All rights reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /**
   * @fileoverview Tests whether the page is using document.write().
   */
  
  'use strict';
  
  const Gatherer = require('../gatherer');
  
  class DocWriteUse extends Gatherer {
  
    beforePass(options) {
      this.collectUsage = options.driver.captureFunctionCallSites('document.write');
    }
  
    afterPass() {
      return this.collectUsage().then(DocWriteUses => {
        return {
          usage: DocWriteUses
        };
      }, e => {
        return {
          value: -1,
          debugString: e.message
        };
      });
    }
  }
  
  module.exports = DocWriteUse;
  