Test your AI Agents with the all-new Agent to Agent Testing Platform.Learn More
How to use stopJSCoverage method in Playwright Internal
Best JavaScript code snippet using playwright-internal
coverage.spec.js
Source:coverage.spec.js 
...20 describe('JSCoverage', function() {21 it('should work', async function({page, server}) {22 await page.coverage.startJSCoverage();23 await page.goto(server.PREFIX + '/jscoverage/simple.html', {waitUntil: 'networkidle0'});24 const coverage = await page.coverage.stopJSCoverage();25 expect(coverage.length).toBe(1);26 expect(coverage[0].url).toContain('/jscoverage/simple.html');27 expect(coverage[0].ranges).toEqual([28 { start: 0, end: 17 },29 { start: 35, end: 61 },30 ]);31 });32 it('should report sourceURLs', async function({page, server}) {33 await page.coverage.startJSCoverage();34 await page.goto(server.PREFIX + '/jscoverage/sourceurl.html');35 const coverage = await page.coverage.stopJSCoverage();36 expect(coverage.length).toBe(1);37 expect(coverage[0].url).toBe('nicename.js');38 });39 it('should ignore eval() scripts by default', async function({page, server}) {40 await page.coverage.startJSCoverage();41 await page.goto(server.PREFIX + '/jscoverage/eval.html');42 const coverage = await page.coverage.stopJSCoverage();43 expect(coverage.length).toBe(1);44 });45 it('shouldn\'t ignore eval() scripts if reportAnonymousScripts is true', async function({page, server}) {46 await page.coverage.startJSCoverage({reportAnonymousScripts: true});47 await page.goto(server.PREFIX + '/jscoverage/eval.html');48 const coverage = await page.coverage.stopJSCoverage();49 expect(coverage.find(entry => entry.url.startsWith('debugger://'))).not.toBe(null);50 expect(coverage.length).toBe(2);51 });52 it('should ignore pptr internal scripts if reportAnonymousScripts is true', async function({page, server}) {53 await page.coverage.startJSCoverage({reportAnonymousScripts: true});54 await page.goto(server.EMPTY_PAGE);55 await page.evaluate('console.log("foo")');56 await page.evaluate(() => console.log('bar'));57 const coverage = await page.coverage.stopJSCoverage();58 expect(coverage.length).toBe(0);59 });60 it('should report multiple scripts', async function({page, server}) {61 await page.coverage.startJSCoverage();62 await page.goto(server.PREFIX + '/jscoverage/multiple.html');63 const coverage = await page.coverage.stopJSCoverage();64 expect(coverage.length).toBe(2);65 coverage.sort((a, b) => a.url.localeCompare(b.url));66 expect(coverage[0].url).toContain('/jscoverage/script1.js');67 expect(coverage[1].url).toContain('/jscoverage/script2.js');68 });69 it('should report right ranges', async function({page, server}) {70 await page.coverage.startJSCoverage();71 await page.goto(server.PREFIX + '/jscoverage/ranges.html');72 const coverage = await page.coverage.stopJSCoverage();73 expect(coverage.length).toBe(1);74 const entry = coverage[0];75 expect(entry.ranges.length).toBe(1);76 const range = entry.ranges[0];77 expect(entry.text.substring(range.start, range.end)).toBe(`console.log('used!');`);78 });79 it('should report scripts that have no coverage', async function({page, server}) {80 await page.coverage.startJSCoverage();81 await page.goto(server.PREFIX + '/jscoverage/unused.html');82 const coverage = await page.coverage.stopJSCoverage();83 expect(coverage.length).toBe(1);84 const entry = coverage[0];85 expect(entry.url).toContain('unused.html');86 expect(entry.ranges.length).toBe(0);87 });88 it('should work with conditionals', async function({page, server}) {89 await page.coverage.startJSCoverage();90 await page.goto(server.PREFIX + '/jscoverage/involved.html');91 const coverage = await page.coverage.stopJSCoverage();92 expect(JSON.stringify(coverage, null, 2).replace(/:\d{4}\//g, ':<PORT>/')).toBeGolden('jscoverage-involved.txt');93 });94 describe('resetOnNavigation', function() {95 it('should report scripts across navigations when disabled', async function({page, server}) {96 await page.coverage.startJSCoverage({resetOnNavigation: false});97 await page.goto(server.PREFIX + '/jscoverage/multiple.html');98 await page.goto(server.EMPTY_PAGE);99 const coverage = await page.coverage.stopJSCoverage();100 expect(coverage.length).toBe(2);101 });102 it('should NOT report scripts across navigations when enabled', async function({page, server}) {103 await page.coverage.startJSCoverage(); // Enabled by default.104 await page.goto(server.PREFIX + '/jscoverage/multiple.html');105 await page.goto(server.EMPTY_PAGE);106 const coverage = await page.coverage.stopJSCoverage();107 expect(coverage.length).toBe(0);108 });109 });110 // @see https://crbug.com/990945111 xit('should not hang when there is a debugger statement', async function({page, server}) {112 await page.coverage.startJSCoverage();113 await page.goto(server.EMPTY_PAGE);114 await page.evaluate(() => {115 debugger; // eslint-disable-line no-debugger116 });117 await page.coverage.stopJSCoverage();118 });119 });120 describe('CSSCoverage', function() {121 it('should work', async function({page, server}) {122 await page.coverage.startCSSCoverage();123 await page.goto(server.PREFIX + '/csscoverage/simple.html');124 const coverage = await page.coverage.stopCSSCoverage();125 expect(coverage.length).toBe(1);126 expect(coverage[0].url).toContain('/csscoverage/simple.html');127 expect(coverage[0].ranges).toEqual([128 {start: 1, end: 22}129 ]);130 const range = coverage[0].ranges[0];131 expect(coverage[0].text.substring(range.start, range.end)).toBe('div { color: green; }');...
coverage.js
Source:coverage.js
...24 await page.coverage.startJSCoverage()25 await page.goto(server.PREFIX + '/jscoverage/simple.html', {26 waitUntil: 'networkidle0'27 })28 const coverage = await page.coverage.stopJSCoverage()29 t.is(coverage.length, 1)30 t.true(coverage[0].url.includes('/jscoverage/simple.html'))31 t.deepEqual(coverage[0].ranges, [32 { start: 0, end: 17 },33 { start: 35, end: 61 }34 ])35})36test.serial('JSCoverage should report sourceURLs', async t => {37 const { page, server } = t.context38 await page.coverage.startJSCoverage()39 await page.goto(server.PREFIX + '/jscoverage/sourceurl.html')40 const coverage = await page.coverage.stopJSCoverage()41 t.is(coverage.length, 1)42 t.is(coverage[0].url, 'nicename.js')43})44test.serial('JSCoverage should ignore eval() scripts by default', async t => {45 const { page, server } = t.context46 await page.coverage.startJSCoverage()47 await page.goto(server.PREFIX + '/jscoverage/eval.html')48 const coverage = await page.coverage.stopJSCoverage()49 t.is(coverage.length, 1)50})51test.serial(52 "JSCoverage shouldn't ignore eval() scripts if reportAnonymousScripts is true",53 async t => {54 const { page, server } = t.context55 await page.coverage.startJSCoverage({ reportAnonymousScripts: true })56 await page.goto(server.PREFIX + '/jscoverage/eval.html')57 const coverage = await page.coverage.stopJSCoverage()58 t.truthy(coverage.find(entry => entry.url.startsWith('debugger://')))59 t.is(coverage.length, 2)60 }61)62test.serial.skip(63 'JSCoverage should ignore pptr internal scripts if reportAnonymousScripts is true',64 async t => {65 const { page, server } = t.context66 await page.coverage.startJSCoverage({ reportAnonymousScripts: true })67 await page.goto(server.EMPTY_PAGE)68 await page.evaluate('console.log("foo")')69 await page.evaluate(() => console.log('bar'))70 const coverage = await page.coverage.stopJSCoverage()71 t.is(coverage.length, 0)72 }73)74test.serial('JSCoverage should report multiple scripts', async t => {75 const { page, server } = t.context76 await page.coverage.startJSCoverage()77 await page.goto(server.PREFIX + '/jscoverage/multiple.html')78 const coverage = await page.coverage.stopJSCoverage()79 t.is(coverage.length, 2)80 coverage.sort((a, b) => a.url.localeCompare(b.url))81 t.true(coverage[0].url.includes('/jscoverage/script1.js'))82 t.true(coverage[1].url.includes('/jscoverage/script2.js'))83})84test.serial('JSCoverage should report right ranges', async t => {85 const { page, server } = t.context86 await page.coverage.startJSCoverage()87 await page.goto(server.PREFIX + '/jscoverage/ranges.html')88 const coverage = await page.coverage.stopJSCoverage()89 t.is(coverage.length, 1)90 const entry = coverage[0]91 t.is(entry.ranges.length, 1)92 const range = entry.ranges[0]93 t.is(entry.text.substring(range.start, range.end), `console.log('used!');`)94})95test.serial(96 'JSCoverage should report scripts that have no coverage',97 async t => {98 const { page, server } = t.context99 await page.coverage.startJSCoverage()100 await page.goto(server.PREFIX + '/jscoverage/unused.html')101 const coverage = await page.coverage.stopJSCoverage()102 t.is(coverage.length, 1)103 const entry = coverage[0]104 t.true(entry.url.includes('unused.html'))105 t.is(entry.ranges.length, 0)106 }107)108test.serial('JSCoverage should work with conditionals', async t => {109 const { page, server } = t.context110 await page.coverage.startJSCoverage()111 await page.goto(server.PREFIX + '/jscoverage/involved.html')112 const coverage = await page.coverage.stopJSCoverage()113 t.context.toBeGolden(114 t,115 JSON.stringify(coverage, null, 2).replace(/:\d{4}\//g, ':<PORT>/'),116 'jscoverage-involved.txt'117 )118})119test.serial(120 'JSCoverage - resetOnNavigation: should report scripts across navigations when disabled',121 async t => {122 const { page, server } = t.context123 await page.coverage.startJSCoverage({ resetOnNavigation: false })124 await page.goto(server.PREFIX + '/jscoverage/multiple.html')125 await page.goto(server.EMPTY_PAGE)126 const coverage = await page.coverage.stopJSCoverage()127 t.is(coverage.length, 2)128 }129)130test.serial(131 'JSCoverage - resetOnNavigation: should NOT report scripts across navigations when enabled',132 async t => {133 const { page, server } = t.context134 await page.coverage.startJSCoverage() // Enabled by default.135 await page.goto(server.PREFIX + '/jscoverage/multiple.html')136 await page.goto(server.EMPTY_PAGE)137 const coverage = await page.coverage.stopJSCoverage()138 t.is(coverage.length, 0)139 }140)141test.serial(142 'JSCoverage should not hang when there is a debugger statement',143 async t => {144 const { page, server } = t.context145 await page.coverage.startJSCoverage()146 await page.goto(server.EMPTY_PAGE)147 await page.evaluate(`() => {148 debugger // eslint-disable-line no-debugger149 }`)150 await page.coverage.stopJSCoverage()151 t.pass()152 }153)154test.serial('CSSCoverage should work', async t => {155 const { page, server } = t.context156 await page.coverage.startCSSCoverage()157 await page.goto(server.PREFIX + '/csscoverage/simple.html')158 const coverage = await page.coverage.stopCSSCoverage()159 t.is(coverage.length, 1)160 t.true(coverage[0].url.includes('/csscoverage/simple.html'))161 t.deepEqual(coverage[0].ranges, [{ start: 1, end: 22 }])162 const range = coverage[0].ranges[0]163 t.is(164 coverage[0].text.substring(range.start, range.end),...
setup.test.js
Source:setup.test.js
...15 'file:///Users/anirudhsharma/Documents/Semester8_College/STAD/Final%20Project/MonopolyTestFinalProj/monopoly-master1/index.html'16 )17 await page.click('#setup > div:nth-child(10) > input[type=button]')18 const [jsCoverage, cssCoverage] = await Promise.all([19 page.coverage.stopJSCoverage(),20 page.coverage.stopCSSCoverage(),21 ]);22 pti.write([...jsCoverage, ...cssCoverage], { includeHostname: true , storagePath: './.nyc_output' })23 await browser.close()24})25test("test start game click - 4 players", async () => {26 const browser = await puppeteer.launch({27 })28 const page = await browser.newPage()29 // Enable both JavaScript and CSS coverage30 await Promise.all([31 page.coverage.startJSCoverage([false, false]),32 page.coverage.startCSSCoverage()33 ]);34 await page.goto(35 'file:///Users/anirudhsharma/Documents/Semester8_College/STAD/Final%20Project/MonopolyTestFinalProj/monopoly-master1/index.html'36 )37 const [jsCoverage, cssCoverage] = await Promise.all([38 page.coverage.stopJSCoverage(),39 page.coverage.stopCSSCoverage(),40 ]);41 pti.write([...jsCoverage, ...cssCoverage], { includeHostname: true , storagePath: './.nyc_output' })42 await browser.close()...
e2e.spec.js
Source:e2e.spec.js
...32 const element = await page.$('title')33 const text = await page.evaluate(element => element.textContent, element)34 consola.info(`|${text}|`)35 t.true(text === 'roomer.live - roomer.live')36 const jsCoverage = await page.coverage.stopJSCoverage()37 saveCoverage(jsCoverage, nycOutputPath)38 await page.screenshot({39 path: 'example.png'40 })41 t.pass()42})43test.before('Close pupeteer', async (t) => {44 if (browser) {45 jsCoverage = await page.coverage.stopJSCoverage()46 saveCoverage(jsCoverage, nycOutputPath)47 // pti.write([...jsCoverage])48 consola.success('closing pupeteer')49 await browser.close()50 }...
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 await page.coverage.startJSCoverage();7 const coverage = await page.coverage.stopJSCoverage();8 console.log(coverage);9 await browser.close();10})();
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 await page.coverage.startJSCoverage();7 const jsCoverage = await page.coverage.stopJSCoverage();8 console.log(jsCoverage);9 await browser.close();10})();11#### coverage.startCSSCoverage(options)12#### coverage.startJSCoverage(options)13#### coverage.stopCSSCoverage()
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 await page.coverage.startJSCoverage();7 const coverage = await page.coverage.stopJSCoverage();8 console.log(coverage);9 await browser.close();10})();11#### coverage.startJSCoverage(options)12#### coverage.stopJSCoverage()
Using AI Code Generation
1const playwright = require("playwright");2(async () => {3 const browser = await playwright.chromium.launch({4 });5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.coverage.startJSCoverage();8 await page.click('text="API"');9 await page.waitForSelector('text="Playwright"');10 const jsCoverage = await page.coverage.stopJSCoverage();11 console.log(jsCoverage);12 await browser.close();13})();14 {15 }16const playwright = require("playwright");17(async () => {18 const browser = await playwright.chromium.launch({19 });20 const context = await browser.newContext();21 const page = await context.newPage();22 await page.coverage.startJSCoverage();23 await page.click('text="API"');24 await page.waitForSelector('text="Playwright"');25 const jsCoverage = await page.coverage.stopJSCoverage();26 console.log(jsCoverage);27 await browser.close();28})();29 {
Using AI Code Generation
1const playwright = require('playwright');2(async () => {3 const browser = await playwright.chromium.launch({ headless: false });4 const context = await browser.newContext();5 await context.tracing.start({ screenshots: true, snapshots: true });6 const page = await context.newPage();7 await page.screenshot({ path: `example.png` });8 await context.tracing.stop({ path: `trace.zip` });9 await browser.close();10})();11const playwright = require('playwright');12(async () => {13 const browser = await playwright.chromium.launch({ headless: false });14 const context = await browser.newContext();15 await context.tracing.start({ screenshots: true, snapshots: true });16 const page = await context.newPage();17 await page.screenshot({ path: `example.png` });18 await context.tracing.stop({ path: `trace.zip` });19 await browser.close();20})();21const playwright = require('playwright');22(async () => {23 const browser = await playwright.chromium.launch({ headless: false });24 const context = await browser.newContext();25 await context.tracing.start({ screenshots: true, snapshots: true });26 const page = await context.newPage();27 await page.screenshot({ path: `example.png` });28 await context.tracing.stop({ path: `trace.zip` });29 await browser.close();30})();31const playwright = require('playwright');32(async () => {33 const browser = await playwright.chromium.launch({ headless: false });34 const context = await browser.newContext();35 await context.tracing.start({ screenshots: true, snapshots: true });36 const page = await context.newPage();37 await page.screenshot({ path: `example.png` });38 await context.tracing.stop({ path: `trace.zip` });39 await browser.close();40})();41const playwright = require('playwright');
Using AI Code Generation
1const { stopJSCoverage } = require('@playwright/test/lib/server/coverage');2const { stopCSSCoverage } = require('@playwright/test/lib/server/coverage');3const { stopCoverage } = require('@playwright/test/lib/server/coverage');4const { startJSCoverage } = require('@playwright/test/lib/server/coverage');5const { startCSSCoverage } = require('@playwright/test/lib/server/coverage');6const { startCoverage } = require('@playwright/test/lib/server/coverage');7const { CoverageWriter } = require('@playwright/test/lib/server/coverage');8const { Coverage } = require('@playwright/test/lib/server/coverage');9const { CoverageEntry } = require('@playwright/test/lib/server/coverage');10| `write(path)` | Writes the coverage to a file at the given path. |11const { CoverageWriter } = require('@playwright/test/lib/server/coverage');12const coverageWriter = new CoverageWriter();13coverageWriter.entries = [/*...*/];14await coverageWriter.write('path/to/coverage.json');15| `startJSCoverage(options)` | Starts JavaScript coverage. |16| `stopJSCoverage()` | Stops JavaScript coverage. |17| `startCSSCoverage(options)`
Using AI Code Generation
1const playwright = require('playwright');2const fs = require('fs');3(async () => {4 const browser = await playwright.chromium.launch({ headless: false, slowMo: 1000 });5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.coverage.startJSCoverage({ resetOnNavigation: true });8 const jsCoverage = await page.coverage.stopJSCoverage();9 const coverage = [];10 for (const entry of jsCoverage) {11 coverage.push({12 });13 }14 fs.writeFileSync('jscoverage.json', JSON.stringify(coverage));15 await browser.close();16})();17const { test, expect } = require('@playwright/test');18test('basic test', async ({ page }) => {19 const title = page.locator('text=Playwright');20 await expect(title).toBeVisible();21});22const { test, expect } =
Using AI Code Generation
1const { stopJSCoverage } = require('playwright/lib/server/coverage');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.coverage.startJSCoverage();8 const jsCoverage = await stopJSCoverage(page);9 console.log(jsCoverage);10 await browser.close();11})();12 {13 text: 'var a={};',14 }15const { stopJSCoverage } = require('playwright/lib/server/coverage');16const { chromium } = require('playwright');17(async () => {18 const browser = await chromium.launch();19 const context = await browser.newContext();20 const page = await context.newPage();21 await page.coverage.startJSCoverage();22 const jsCoverage = await stopJSCoverage(page);23 const coverage = page.coverage.stopJSCoverage();24 console.log(coverage);25 await browser.close();26})();27 {28 text: 'var a={};',29 }30const { stopJSCoverage } = require('playwright/lib/server/coverage');31const { chromium } = require('playwright');32(async () => {
Using AI Code Generation
1const { coverage } = require('playwright');2(async () => {3 await coverage.stopJSCoverage();4})();5#### coverage.startCSSCoverage([options])6#### coverage.stopCSSCoverage()7#### coverage.startJSCoverage([options])8#### coverage.stopJSCoverage()
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?
