text: /**
   * Copyright 2017 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.
   */
  
  const preprocessor = require('.');
  const SourceFactory = require('../SourceFactory');
  const factory = new SourceFactory();
  const VERSION = require('../../../package.json').version;
  
  describe('preprocessor', function() {
    it('should throw for unknown command', function() {
      const source = factory.createForTest('doc.md', getCommand('unknownCommand()'));
      const messages = preprocessor([source]);
      expect(source.hasUpdatedText()).toBe(false);
      expect(messages.length).toBe(1);
      expect(messages[0].type).toBe('error');
      expect(messages[0].text).toContain('Unknown command');
    });
    describe('gen:version', function() {
      it('should work', function() {
        const source = factory.createForTest('doc.md', `Puppeteer v${getCommand('version')}`);
        const messages = preprocessor([source]);
        expect(messages.length).toBe(1);
        expect(messages[0].type).toBe('warning');
        expect(messages[0].text).toContain('doc.md');
        expect(source.text()).toBe(`Puppeteer v${getCommand('version', VERSION)}`);
      });
      it('should tolerate different writing', function() {
        const source = factory.createForTest('doc.md', `Puppeteer v<!--   gEn:version (  ) -->WHAT
  <!--     GEN:stop   -->`);
        preprocessor([source]);
        expect(source.text()).toBe(`Puppeteer v<!--   gEn:version (  ) -->${VERSION}<!--     GEN:stop   -->`);
      });
      it('should not tolerate missing gen:stop', function() {
        const source = factory.createForTest('doc.md', `<!--GEN:version-->`);
        const messages = preprocessor([source]);
        expect(source.hasUpdatedText()).toBe(false);
        expect(messages.length).toBe(1);
        expect(messages[0].type).toBe('error');
        expect(messages[0].text).toContain(`Failed to find 'gen:stop'`);
      });
    });
  });
  
  function getCommand(name, body = '') {
    return `<!--gen:${name}-->${body}<!--gen:stop-->`;
  }
  