Function callback

test/openlayers/mapping/WebMapSpec.js:1182–1191

()

    });

    function callback() {
      if (!refresh) {
        expect(datavizWebmap.baseLayer.name).toEqual('天地图');
        refresh = true;
        datavizWebmap.refresh();
      } else {
        expect(datavizWebmap.baseLayer.name).toEqual('百度地图');
        done();
      }
    }
  });

  it('createSpecLayer_TILE', (done) => {