| (async function(testRunner) { |
| const {page, session, dp} = await testRunner.startBlank( |
| `Tests that tracing with proto format outputs something resembling protos.`); |
| |
| const TracingHelper = await testRunner.loadScript('../resources/tracing-test.js'); |
| const tracingHelper = new TracingHelper(testRunner, session); |
| |
| const startResponse = await dp.Tracing.start( |
| {transferMode: 'ReturnAsStream', streamFormat: 'proto'}); |
| if (startResponse.error) { |
| testRunner.log('Start failed: ' + startResponse.error.message); |
| testRunner.completeTest(); |
| return; |
| } |
| |
| const stream = await tracingHelper.stopTracingAndReturnStream(); |
| const data = await tracingHelper.retrieveStream(stream, null, null); |
| // First byte should be TracePacket field ID preamble (byte value 10). |
| testRunner.log('First byte: ' + data.charCodeAt(0)); |
| testRunner.completeTest(); |
| }) |
