Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! 
How to use tracingStart method in Playwright Internal
Best JavaScript code snippet using playwright-internal
service-instance.js
Source:service-instance.js 
...288 * Start tracing on all workers on this instance289 *290 * @param {function} callback Callback function.291 */292 function tracingStart(callback) {293 return this.updateAttributes({tracingEnabled: true}, function(err) {294 if (err) return callback(err);295 return callback(null, {message: 'tracing started'});296 });297 }298 ServiceInstance.prototype.tracingStart = tracingStart;299 /**300 * Stop tracing on all workers on this instance301 *302 * @param {function} callback Callback function.303 */304 function tracingStop(callback) {305 return this.updateAttributes({tracingEnabled: false}, function(err) {306 if (err) return callback(err);...
Chain.js
Source:Chain.js
1import { basename, dirname, extname, relative, resolve } from 'path';2import { writeFile, writeFileSync } from 'sander';3import { encode } from 'sourcemap-codec';4import SourceMap from './SourceMap.js';5import slash from './utils/slash.js';6import SOURCEMAPPING_URL from './utils/sourceMappingURL.js';7const SOURCEMAP_COMMENT = new RegExp( `\n*(?:` +8 `\\/\\/[@#]\\s*${SOURCEMAPPING_URL}=([^'"]+)|` + // js9 `\\/\\*#?\\s*${SOURCEMAPPING_URL}=([^'"]+)\\s\\*\\/)` + // css10'\\s*$', 'g' );11export default function Chain ( node, sourcesContentByPath ) {12 this.node = node;13 this.sourcesContentByPath = sourcesContentByPath;14 this._stats = {};15}16Chain.prototype = {17 stat () {18 return {19 selfDecodingTime: this._stats.decodingTime / 1e6,20 totalDecodingTime: ( this._stats.decodingTime + tally( this.node.sources, 'decodingTime' ) ) / 1e6,21 encodingTime: this._stats.encodingTime / 1e6,22 tracingTime: this._stats.tracingTime / 1e6,23 untraceable: this._stats.untraceable24 };25 },26 apply ( options = {} ) {27 let allNames = [];28 let allSources = [];29 const applySegment = ( segment, result ) => {30 if ( segment.length < 4 ) return;31 const traced = this.node.sources[ segment[1] ].trace( // source32 segment[2], // source code line33 segment[3], // source code column34 this.node.map.names[ segment[4] ]35 );36 if ( !traced ) {37 this._stats.untraceable += 1;38 return;39 }40 let sourceIndex = allSources.indexOf( traced.source );41 if ( !~sourceIndex ) {42 sourceIndex = allSources.length;43 allSources.push( traced.source );44 }45 let newSegment = [46 segment[0], // generated code column47 sourceIndex,48 traced.line - 1,49 traced.column50 ];51 if ( traced.name ) {52 let nameIndex = allNames.indexOf( traced.name );53 if ( !~nameIndex ) {54 nameIndex = allNames.length;55 allNames.push( traced.name );56 }57 newSegment[4] = nameIndex;58 }59 result[ result.length ] = newSegment;60 };61 // Trace mappings62 let tracingStart = process.hrtime();63 let i = this.node.mappings.length;64 let resolved = new Array( i );65 let j, line, result;66 while ( i-- ) {67 line = this.node.mappings[i];68 resolved[i] = result = [];69 for ( j = 0; j < line.length; j += 1 ) {70 applySegment( line[j], result );71 }72 }73 let tracingTime = process.hrtime( tracingStart );74 this._stats.tracingTime = 1e9 * tracingTime[0] + tracingTime[1];75 // Encode mappings76 let encodingStart = process.hrtime();77 let mappings = encode( resolved );78 let encodingTime = process.hrtime( encodingStart );79 this._stats.encodingTime = 1e9 * encodingTime[0] + encodingTime[1];80 let includeContent = options.includeContent !== false;81 return new SourceMap({82 file: basename( this.node.file ),83 sources: allSources.map( source => slash( relative( options.base || dirname( this.node.file ), source ) ) ),84 sourcesContent: allSources.map( source => includeContent ? this.sourcesContentByPath[ source ] : null ),85 names: allNames,86 mappings87 });88 },89 trace ( oneBasedLineIndex, zeroBasedColumnIndex ) {90 return this.node.trace( oneBasedLineIndex - 1, zeroBasedColumnIndex, null );91 },92 write ( dest, options ) {93 if ( typeof dest !== 'string' ) {94 options = dest;95 dest = this.node.file;96 }97 options = options || {};98 const { resolved, content, map } = processWriteOptions( dest, this, options );99 let promises = [ writeFile( resolved, content ) ];100 if ( !options.inline ) {101 promises.push( writeFile( resolved + '.map', map.toString() ) );102 }103 return Promise.all( promises );104 },105 writeSync ( dest, options ) {106 if ( typeof dest !== 'string' ) {107 options = dest;108 dest = this.node.file;109 }110 options = options || {};111 const { resolved, content, map } = processWriteOptions( dest, this, options );112 writeFileSync( resolved, content );113 if ( !options.inline ) {114 writeFileSync( resolved + '.map', map.toString() );115 }116 }117};118function processWriteOptions ( dest, chain, options ) {119 const resolved = resolve( dest );120 const map = chain.apply({121 includeContent: options.includeContent,122 base: options.base ? resolve( options.base ) : dirname( resolved )123 });124 const url = options.inline ? map.toUrl() : ( options.absolutePath ? resolved : basename( resolved ) ) + '.map';125 // TODO shouldn't url be relative?126 const content = chain.node.content.replace( SOURCEMAP_COMMENT, '' ) + sourcemapComment( url, resolved );127 return { resolved, content, map };128}129function tally ( nodes, stat ) {130 return nodes.reduce( ( total, node ) => {131 return total + node._stats[ stat ];132 }, 0 );133}134function sourcemapComment ( url, dest ) {135 const ext = extname( dest );136 url = encodeURI( url );137 if ( ext === '.css' ) {138 return `\n/*# ${SOURCEMAPPING_URL}=${url} */\n`;139 }140 return `\n//# ${SOURCEMAPPING_URL}=${url}\n`;...
test-meshctl-tracing.js
Source:test-meshctl-tracing.js
...25 TestServiceManager.prototype.onCtlRequest = onCtlRequest;26 tt.end();27 });28 t.test('Start tracing API', function(tt) {29 instance.tracingStart(function(err, status) {30 tt.ifError(err, 'call should not error');31 tt.deepEqual(status, {message: 'tracing started'},32 'Response should match');33 tt.end();34 });35 });36 t.test('Start tracing CLI', function(tt) {37 exec.resetHome();38 exec(port, 'tracing-start 1', function(err, stdout) {39 tt.ifError(err, 'command should not error');40 tt.equal(stdout, 'Tracing started\n',41 'Rendered status should match');42 tt.end();43 });...
tracingDispatcher.js
Source:tracingDispatcher.js
...30 super(scope, tracing, 'Tracing', {}, true);31 this._type_Tracing = true;32 tracing.on(_tracing.Tracing.Events.Dispose, () => this._dispose());33 }34 async tracingStart(params) {35 await this._object.start(params);36 }37 async tracingStartChunk(params) {38 await this._object.startChunk(params);39 }40 async tracingStopChunk(params) {41 const {42 artifact,43 sourceEntries44 } = await this._object.stopChunk(params);45 return {46 artifact: artifact ? new _artifactDispatcher.ArtifactDispatcher(this._scope, artifact) : undefined,47 sourceEntries48 };...
tracing.js
Source:tracing.js
...25 this._context = channel;26 }27 async start(options = {}) {28 await this._context._wrapApiCall(async channel => {29 await channel.tracingStart(options);30 await channel.tracingStartChunk();31 });32 }33 async startChunk() {34 await this._context._wrapApiCall(async channel => {35 await channel.tracingStartChunk();36 });37 }38 async stopChunk(options = {}) {39 await this._context._wrapApiCall(async channel => {40 await this._doStopChunk(channel, options.path);41 });42 }43 async stop(options = {}) {...
index.js
Source:index.js
...3timeline(async (runner) => {4 // load something in chromium5 await runner.page.goto('http://127.0.0.1:3000');6 // start a timeline profiling7 await runner.tracingStart('LS_TRACE');8 // do something in the remote page9 await runner.remote((done, window) => {10 // this is within remote browser context11 window.term._core.handler('tree\r');12 setTimeout(() => done(), 4000);13 });14 await runner.tracingStop();15});1617// .then((summary) => {18// const textRenderTime = findTraceValue('./lib/renderer/TextRenderLayer.js.TextRenderLayer.onGridChanged').totalTime;19// console.log(textRenderTime);
...
puppetteer-chrome-timeline.js
Source:puppetteer-chrome-timeline.js
2timeline(async (runner) => {3 // load something in chromium4 await runner.page.goto('http://localhost:63342/win_BD_experiment/clean-leaflet/');5 // start a timeline profiling6 await runner.tracingStart('profile');7 // do something in the remote page8 await runner.remote((done, window) => {9 // // this is within remote browser context10 // some_heavy_stuff_to_be_measured();11 // // call done when finished (sync variant)12 // done();13 // // or async example with setTimeout14 // setTimeout(done, 10000);15 });16 // stop the profiling17 await runner.tracingStop();...
Using AI Code Generation
1const playwright = require('playwright');2(async () => {3const browser = await playwright.chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6await page.tracing.start({ screenshots: true, snapshots: true });7await page.tracing.stop({ path: 'trace.zip' });8await browser.close();9})();10const playwright = require('playwright');11(async () => {12const browser = await playwright.chromium.launch();13const context = await browser.newContext();14const page = await context.newPage();15await page.tracing.start({ screenshots: true, snapshots: true });16await page.tracing.stop({ path: 'trace.zip' });17await browser.close();18})();19const playwright = require('playwright');20(async () => {21const browser = await playwright.chromium.launch();22const context = await browser.newContext();23const page = await context.newPage();24await page.tracing.start({ screenshots: true, snapshots: true });25await page.tracing.stop({ path: 'trace.zip' });26await browser.close();27})();28const playwright = require('playwright');29(async () => {30const browser = await playwright.chromium.launch();31const context = await browser.newContext();32const page = await context.newPage();33await page.tracing.start({ screenshots: true, snapshots: true });34await page.tracing.stop({ path: 'trace.zip' });35await browser.close();36})();37const playwright = require('playwright');38(async () => {39const browser = await playwright.chromium.launch();40const context = await browser.newContext();41const page = await context.newPage();42await page.tracing.start({ screenshots: true, snapshots: true });43await page.tracing.stop({ path: 'trace.zip' });44await browser.close();45})();46const playwright = require('playwright');47(async () => {48const browser = await playwright.chromium.launch();49const context = await browser.newContext();50const page = await context.newPage();
Using AI Code Generation
1const { trace } = require('@playwright/test');2const { chromium } = require('playwright');3const browser = await chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6await trace.start({ screenshots: true, snapshots: true });7await page.screenshot({ path: `example.png` });8await trace.stop({ path: `trace.zip` });9await browser.close();10const { trace } = require('@playwright/test');11const { chromium } = require('playwright');12const browser = await chromium.launch();13const context = await browser.newContext();14const page = await context.newPage();15await trace.start({ screenshots: true, snapshots: true });16await page.screenshot({ path: `example.png` });17await trace.stop({ path: `trace.zip` });18await browser.close();19const { trace } = require('@playwright/test');20const { chromium } = require('playwright');21const browser = await chromium.launch();22const context = await browser.newContext();23const page = await context.newPage();24await trace.start({ screenshots: true, snapshots: true });25await page.screenshot({ path: `example.png` });26await trace.stop({ path: `trace.zip` });27await browser.close();28const { trace } = require('@playwright/test');29const { chromium } = require('playwright');30const browser = await chromium.launch();31const context = await browser.newContext();32const page = await context.newPage();33await trace.start({ screenshots: true, snapshots: true });34await page.screenshot({ path: `example.png` });35await trace.stop({ path: `trace.zip` });36await browser.close();37const { trace } = require('@playwright/test');38const { chromium } = require('playwright');39const browser = await chromium.launch();40const context = await browser.newContext();41const page = await context.newPage();42await trace.start({ screenshots: true, snapshots: true });43await page.goto('http
Using AI Code Generation
1const { trace } = require('@playwright/test');2await trace.start({ screenshots: true, snapshots: true });3await trace.stop({ path: 'trace.zip' });4const { trace } = require('@playwright/test');5await trace.start({ screenshots: true, snapshots: true });6await trace.stop({ path: 'trace.zip' });7const { trace } = require('@playwright/test');8await trace.start({ screenshots: true, snapshots: true });9await trace.stop({ path: 'trace.zip' });10await trace.export({ format: 'devtools' });11const { trace } = require('@playwright/test');12await trace.start({ screenshots: true, snapshots: true });13await trace.startChunk();14await page.click('text=Get started');15await trace.stopChunk({ path: 'chunk1.zip' });16await trace.stop({ path: 'trace.zip' });17const { trace } = require('@playwright/test');18await trace.start({ screenshots: true, snapshots: true });19await trace.startChunk();20await page.click('text=Get started');21await trace.stopChunk({ path: 'chunk1.zip' });22await trace.stop({ path: 'trace.zip' });23const { trace } = require('@playwright/test');24await trace.start({ screenshots: true, snapshots: true });25await trace.startSpan({ name: 'test' });26await page.click('text=Get started');27await trace.stopSpan();28const { trace } = require('@playwright/test');29await trace.start({ screenshots: true, snapshots: true });30await trace.startSpan({ name: 'test' });31await page.click('text=Get started');32await trace.stopSpan();
Using AI Code Generation
1const { tracingStart } = require('playwright-core/lib/server/trace/recorder');2const { chromium } = require('playwright-core');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await tracingStart({8 });9 await page.screenshot({ path: `test.png` });10 await browser.close();11})();12### `tracingStart(options)`
Using AI Code Generation
1const playwright = require('playwright');2const { tracingStart } = require('playwright/lib/server/chromium/crTracing');3const { chromium } = require('playwright');4(async () => {5 const browser = await chromium.launch({headless: false});6 const context = await browser.newContext();7 const page = await context.newPage();8 await tracingStart(page, { screenshots: true, snapshots: true });9 await browser.close();10})();11const playwright = require('playwright');12const { chromium } = require('playwright');13(async () => {14 const browser = await chromium.launch({headless: false});15 const context = await browser.newContext();16 const page = await context.newPage();17 await page.tracing.start({ screenshots: true, snapshots: true });18 await browser.close();19})();20const playwright = require('playwright');21const { tracingStop } = require('playwright/lib/server/chromium/crTracing');22const { chromium } = require('playwright');23(async () => {24 const browser = await chromium.launch({headless: false});25 const context = await browser.newContext();26 const page = await context.newPage();27 await tracingStart(page, { screenshots: true, snapshots: true });28 await tracingStop(page);29 await browser.close();30})();31const playwright = require('playwright');32const { chromium } = require('playwright');33(async () => {34 const browser = await chromium.launch({headless: false});35 const context = await browser.newContext();36 const page = await context.newPage();37 await page.tracing.start({ screenshots: true, snapshots: true });38 await page.tracing.stop();39 await browser.close();
Using AI Code Generation
1const { trace } = require('@playwright/test');2trace.start({ screenshots: true, snapshots: true });3trace.stop({ name: 'test-trace' });4const { trace } = require('@playwright/test');5test.use({ trace: 'test-trace' });6trace.stop({ name: 'test-trace' });7const { trace } = require('@playwright/test');8test.use({ trace: 'test-trace' });9trace.stop({ name: 'test-trace' });10const { trace } = require('@playwright/test');11test.use({ trace: 'test-trace' });12trace.stop({ name: 'test-trace' });13const { trace } = require('@playwright/test');14test.use({ trace: 'test-trace' });15trace.stop({ name: 'test-trace' });16const { trace } = require('@playwright/test');17test.use({ trace: 'test-trace' });
Using AI Code Generation
1await playwright._traceResources(path.join(__dirname, 'trace.zip'));2await playwright._traceStop();3await playwright._traceStartChunk();4await playwright._traceStopChunk(path.join(__dirname, 'trace.zip'));5await playwright._traceExport(path.join(__dirname, 'trace.zip'), path.join(__dirname, 'trace'));6await playwright._traceViewer(path.join(__dirname, 'trace.zip'));7const playwright = require('playwright');8const { trace } = require('playwright-trace');9(async () => {10 const browser = await playwright.chromium.launch();11 const page = await browser.newPage();12 const tracePath = path.join(__dirname, 'trace.zip');13 await trace(page, tracePath);14 await browser.close();15})();
Using AI Code Generation
1const { tracingStart } = require('playwright/lib/server/trace/recorder');2tracingStart({3});4const { tracingStop } = require('playwright/lib/server/trace/recorder');5tracingStop();6### tracingStart(options)7### tracingStop()8[Apache-2.0](LICENSE)
Playwright tutorial
LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.
Chapters:
- What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
- How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
- Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
- What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
- Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
- Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
- Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
- Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
- Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
- Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
- Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
- Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.
Run Playwright Internal automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
