.network.setConditions() 建议编辑

                    .setNetworkConditions(spec, [callback])
                

                    .network.setConditions(spec, [callback])
                

describe('set network conditions', function() {
 it('sets the network conditions',function() {
   browser
    .network.setConditions({
     offline: false,
     latency: 3000,
     download_throughput: 500 * 1024,
     upload_throughput: 500 * 1024
   });
 });
});