text: import {createIframe, getWindow} from '../util';
  import getPageHeight from 'third/dom/getPageHeight';
  
  describe('third/dom/getPageHeight', function() {
      it('getPageHeight()', function () {
          var r1 = getPageHeight();
          // make sure page height not change.
          var r2 = getPageHeight();
          expect(typeof r1).toBe('number');
          expect(typeof r2).toBe('number');
          expect(r1).toBe(r2);
      });
  });
  