text: 'use strict';
  
  describe('Meta Generator', () => {
    const Hexo = require('../../../lib/hexo');
    const hexo = new Hexo();
    const metaGenerator = require('../../../lib/plugins/filter/meta_generator').bind(hexo);
    const cheerio = require('cheerio');
  
    it('default', () => {
      const content = '<head><link></head>';
      const result = metaGenerator(content);
  
      const $ = cheerio.load(result);
      $('meta[name="generator"]').length.should.eql(1);
    });
  
    it('empty <head>', () => {
      const content = '<head></head>';
      const result = metaGenerator(content);
  
      // meta generator should not be prepended if <head> tag is empty
      // see https://github.com/hexojs/hexo/pull/3315
      const resultType = typeof result;
      resultType.should.eql('undefined');
    });
  
    it('disable meta_generator', () => {
      const content = '<head><link></head>';
      hexo.config.meta_generator = false;
      const result = metaGenerator(content);
  
      const resultType = typeof result;
      resultType.should.eql('undefined');
    });
  });
  