How to use stopCSSCoverage method in Puppeteer

Best JavaScript code snippet using puppeteer

coverage.spec.js

Source:coverage.spec.js

...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; }');132    });133    it('should report sourceURLs', async function({page, server}) {134      await page.coverage.startCSSCoverage();135      await page.goto(server.PREFIX + '/csscoverage/sourceurl.html');136      const coverage = await page.coverage.stopCSSCoverage();137      expect(coverage.length).toBe(1);138      expect(coverage[0].url).toBe('nicename.css');139    });140    it('should report multiple stylesheets', async function({page, server}) {141      await page.coverage.startCSSCoverage();142      await page.goto(server.PREFIX + '/csscoverage/multiple.html');143      const coverage = await page.coverage.stopCSSCoverage();144      expect(coverage.length).toBe(2);145      coverage.sort((a, b) => a.url.localeCompare(b.url));146      expect(coverage[0].url).toContain('/csscoverage/stylesheet1.css');147      expect(coverage[1].url).toContain('/csscoverage/stylesheet2.css');148    });149    it('should report stylesheets that have no coverage', async function({page, server}) {150      await page.coverage.startCSSCoverage();151      await page.goto(server.PREFIX + '/csscoverage/unused.html');152      const coverage = await page.coverage.stopCSSCoverage();153      expect(coverage.length).toBe(1);154      expect(coverage[0].url).toBe('unused.css');155      expect(coverage[0].ranges.length).toBe(0);156    });157    it('should work with media queries', async function({page, server}) {158      await page.coverage.startCSSCoverage();159      await page.goto(server.PREFIX + '/csscoverage/media.html');160      const coverage = await page.coverage.stopCSSCoverage();161      expect(coverage.length).toBe(1);162      expect(coverage[0].url).toContain('/csscoverage/media.html');163      expect(coverage[0].ranges).toEqual([164        {start: 17, end: 38}165      ]);166    });167    it('should work with complicated usecases', async function({page, server}) {168      await page.coverage.startCSSCoverage();169      await page.goto(server.PREFIX + '/csscoverage/involved.html');170      const coverage = await page.coverage.stopCSSCoverage();171      expect(JSON.stringify(coverage, null, 2).replace(/:\d{4}\//g, ':<PORT>/')).toBeGolden('csscoverage-involved.txt');172    });173    it('should ignore injected stylesheets', async function({page, server}) {174      await page.coverage.startCSSCoverage();175      await page.addStyleTag({content: 'body { margin: 10px;}'});176      // trigger style recalc177      const margin = await page.evaluate(() => window.getComputedStyle(document.body).margin);178      expect(margin).toBe('10px');179      const coverage = await page.coverage.stopCSSCoverage();180      expect(coverage.length).toBe(0);181    });182    describe('resetOnNavigation', function() {183      it('should report stylesheets across navigations', async function({page, server}) {184        await page.coverage.startCSSCoverage({resetOnNavigation: false});185        await page.goto(server.PREFIX + '/csscoverage/multiple.html');186        await page.goto(server.EMPTY_PAGE);187        const coverage = await page.coverage.stopCSSCoverage();188        expect(coverage.length).toBe(2);189      });190      it('should NOT report scripts across navigations', async function({page, server}) {191        await page.coverage.startCSSCoverage(); // Enabled by default.192        await page.goto(server.PREFIX + '/csscoverage/multiple.html');193        await page.goto(server.EMPTY_PAGE);194        const coverage = await page.coverage.stopCSSCoverage();195        expect(coverage.length).toBe(0);196      });197    });198    it('should work with a recently loaded stylesheet', async function({page, server}) {199      await page.coverage.startCSSCoverage();200      await page.evaluate(async url => {201        document.body.textContent = 'hello, world';202        const link = document.createElement('link');203        link.rel = 'stylesheet';204        link.href = url;205        document.head.appendChild(link);206        await new Promise(x => link.onload = x);207      }, server.PREFIX + '/csscoverage/stylesheet1.css');208      const coverage = await page.coverage.stopCSSCoverage();209      expect(coverage.length).toBe(1);210    });211  });...

coverage.js

Source:coverage.js

...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),165    'div { color: green; }'166  )167})168test.serial('CSSCoverage should report sourceURLs', async t => {169  const { page, server } = t.context170  await page.coverage.startCSSCoverage()171  await page.goto(server.PREFIX + '/csscoverage/sourceurl.html')172  const coverage = await page.coverage.stopCSSCoverage()173  t.is(coverage.length, 1)174  t.is(coverage[0].url, 'nicename.css')175})176test.serial('CSSCoverage should report multiple stylesheets', async t => {177  const { page, server } = t.context178  await page.coverage.startCSSCoverage()179  await page.goto(server.PREFIX + '/csscoverage/multiple.html')180  const coverage = await page.coverage.stopCSSCoverage()181  t.is(coverage.length, 2)182  coverage.sort((a, b) => a.url.localeCompare(b.url))183  t.true(coverage[0].url.includes('/csscoverage/stylesheet1.css'))184  t.true(coverage[1].url.includes('/csscoverage/stylesheet2.css'))185})186test.serial(187  'CSSCoverage should report stylesheets that have no coverage',188  async t => {189    const { page, server } = t.context190    await page.coverage.startCSSCoverage()191    await page.goto(server.PREFIX + '/csscoverage/unused.html')192    const coverage = await page.coverage.stopCSSCoverage()193    t.is(coverage.length, 1)194    t.is(coverage[0].url, 'unused.css')195    t.is(coverage[0].ranges.length, 0)196  }197)198test.serial('CSSCoverage should work with media queries', async t => {199  const { page, server } = t.context200  await page.coverage.startCSSCoverage()201  await page.goto(server.PREFIX + '/csscoverage/media.html')202  const coverage = await page.coverage.stopCSSCoverage()203  t.is(coverage.length, 1)204  t.true(coverage[0].url.includes('/csscoverage/media.html'))205  t.deepEqual(coverage[0].ranges, [{ start: 17, end: 38 }])206})207test.serial('CSSCoverage should work with complicated usecases', async t => {208  const { page, server } = t.context209  await page.coverage.startCSSCoverage()210  await page.goto(server.PREFIX + '/csscoverage/involved.html')211  const coverage = await page.coverage.stopCSSCoverage()212  t.context.toBeGolden(213    t,214    JSON.stringify(coverage, null, 2).replace(/:\d{4}\//g, ':<PORT>/'),215    'csscoverage-involved.txt'216  )217})218test.serial('CSSCoverage should ignore injected stylesheets', async t => {219  const { page, server } = t.context220  await page.coverage.startCSSCoverage()221  await page.addStyleTag({ content: 'body { margin: 10px;}' })222  // trigger style recalc223  const margin = await page.evaluate(224    () => window.getComputedStyle(document.body).margin225  )226  t.is(margin, '10px')227  const coverage = await page.coverage.stopCSSCoverage()228  t.is(coverage.length, 0)229})230test.serial(231  'CSSCoverage - resetOnNavigation: should report stylesheets across navigations',232  async t => {233    const { page, server } = t.context234    await page.coverage.startCSSCoverage({ resetOnNavigation: false })235    await page.goto(server.PREFIX + '/csscoverage/multiple.html')236    await page.goto(server.EMPTY_PAGE)237    const coverage = await page.coverage.stopCSSCoverage()238    t.is(coverage.length, 2)239  }240)241test.serial(242  'CSSCoverage - resetOnNavigation: should NOT report scripts across navigations',243  async t => {244    const { page, server } = t.context245    await page.coverage.startCSSCoverage() // Enabled by default.246    await page.goto(server.PREFIX + '/csscoverage/multiple.html')247    await page.goto(server.EMPTY_PAGE)248    const coverage = await page.coverage.stopCSSCoverage()249    t.is(coverage.length, 0)250  }251)252test.serial(253  'CSSCoverage should work with a recently loaded stylesheet',254  async t => {255    const { page, server } = t.context256    await page.coverage.startCSSCoverage()257    await page.evaluate(async url => {258      document.body.textContent = 'hello, world'259      const link = document.createElement('link')260      link.rel = 'stylesheet'261      link.href = url262      document.head.appendChild(link)263      await new Promise(x => (link.onload = x))264    }, server.PREFIX + '/csscoverage/stylesheet1.css')265    const coverage = await page.coverage.stopCSSCoverage()266    t.is(coverage.length, 1)267  }...

setup.test.js

Source:setup.test.js

...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()...

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  await page.coverage.startCSSCoverage();6  const coverage = await page.coverage.stopCSSCoverage();7  console.log(coverage);8  await browser.close();9})();10  {11      { start: 0, end: 108 },12      { start: 108, end: 164 },13      { start: 164, end: 225 },14      { start: 225, end: 287 },15      { start: 287, end: 350 },16      { start: 350, end: 413 },17      { start: 413, end: 476 },18      { start: 476, end: 539 },19      { start: 539, end: 602 },20      { start: 602, end: 665 },21      { start: 665, end: 728 },22      { start: 728, end: 791 },23      { start: 791, end: 854 },24      { start: 854, end: 917 },25      { start: 917, end: 980 },26      { start: 980, end: 1043 },27      { start: 1043, end: 1106 },28      { start: 1106, end: 1169 },29      { start: 1169, end: 1232 },30      { start: 1232, end: 1295 },31      { start: 1295, end: 1358 },32      { start: 1358, end: 1421 },33      { start: 1421, end: 1484 },34      { start: 1484, end: 1547 },35      { start: 1547, end: 1610 },36      { start: 1610, end: 1673 },37      { start: 1673, end: 1736 },38      { start: 1736, end: 1799 },39      { start: 1799, end: 1862 },40      { start: 1862, end: 1925 },41      { start: 1925, end: 1988 },42      {

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  await page.coverage.startCSSCoverage();6  const coverage = await page.coverage.stopCSSCoverage();7  console.log(coverage);8  await browser.close();9})();10    text: 'html, body {\r11\tmargin: 0;\r12\tpadding: 0;\r13\tfont-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;\r14\tfont-size: 16px;\r15\tline-height: 1.4;\r16\tcolor: #2b2b2b;\r17\tbackground-color: #fff;\r18}\r19a {\r20\tcolor: #007bff;\r21\ttext-decoration: none;\r22\tbackground-color: transparent;\r23}\r24a:hover {\r25\tcolor: #0056b3;\r26\ttext-decoration: underline;\r27}\r28pre, code, kbd, samp {\r29\tfont-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;\r30\tfont-size: 1em;\r31}\r32img {\r33\tvertical-align: middle;\r34\tborder-style: none;\r35}\r

Using AI Code Generation

1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4  const browser = await puppeteer.launch();5  const page = await browser.newPage();6  await page.coverage.startCSSCoverage();7  const coverage = await page.coverage.stopCSSCoverage();8  fs.writeFileSync('./coverage.json', JSON.stringify(coverage));9  await browser.close();10})();11const puppeteer = require('puppeteer');12const fs = require('fs');13(async () => {14  const browser = await puppeteer.launch();15  const page = await browser.newPage();16  await page.coverage.startCSSCoverage();17  const coverage = await page.coverage.stopCSSCoverage();18  fs.writeFileSync('./coverage.json', JSON.stringify(coverage));19  await browser.close();20})();

Using AI Code Generation

1(async () => {2    const browser = await puppeteer.launch();3    const page = await browser.newPage();4    await page.coverage.startCSSCoverage();5    const coverage = await page.coverage.stopCSSCoverage();6    console.log(coverage);7    await browser.close();8})();9[ { url: 'https

Using AI Code Generation

1(async () => {2  const browser = await puppeteer.launch();3  const page = await browser.newPage();4  await page.coverage.startCSSCoverage();5  const cssCoverage = await page.coverage.stopCSSCoverage();6  console.log(cssCoverage);7  await browser.close();8})();9[ CSSCoverage {10    text: 'body{margin:0;padding:0;overflow:hidden}html{height:100%;width:100%;overflow:hidden}#gbar,#guser{display:none}#gbx3,#gbx4{display:none}#gbx4{position:fixed;bottom:0;left:0;right:0}#gbx4>div{display:inline-block}#gbx4>div:after{content:"";display:block;height:0;clear:both}#gbx4>div>*{float:left}#gbx4>div>div{margin:0 8px}#gbx4>div>div:first-child{margin-left:0}#gbx4>div>div:last-child{margin-right:0}#gbx4>div>div{line-height:1.5}#gbx4>div>div>div{display:inline-block}#gbx4>div>div>div:first-child{margin-left:0}#gbx4>div>div>div:last-child{margin-right:0}#gbx4>div>div>div{line-height:1.5}#gbx4>div>div>div>div{display:inline-block}#gbx4>div>div>div>div:first-child{margin-left:0}#gbx4>div>div>div>div:last-child{margin-right:0}#gbx4>div>div>div>div{line-height:1.5}#gbx

Using AI Code Generation

1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4  const browser = await puppeteer.launch({5  });6  const page = await browser.newPage();7  await page.coverage.startCSSCoverage();8  await page.waitFor(1000);9  const cssCoverage = await page.coverage.stopCSSCoverage();10  let totalBytes = 0;11  let usedBytes = 0;12  const coverage = [...cssCoverage];13  for (const entry of coverage) {14    totalBytes += entry.text.length;15    for (const range of entry.ranges)16      usedBytes += range.end - range.start - 1;17  }18  console.log(`Bytes used: ${usedBytes / totalBytes * 100}%`);19  fs.writeFileSync('cssCoverage.json', JSON.stringify(coverage));20  await browser.close();21})();22const puppeteer = require('puppeteer');23const fs = require('fs');24(async () => {25  const browser = await puppeteer.launch({26  });27  const page = await browser.newPage();28  await page.coverage.startJSCoverage();29  await page.waitFor(1000);30  const jsCoverage = await page.coverage.stopJSCoverage();31  let totalBytes = 0;32  let usedBytes = 0;33  const coverage = [...jsCoverage];34  for (const entry of coverage) {35    totalBytes += entry.text.length;36    for (const range of entry.ranges)37      usedBytes += range.end - range.start - 1;38  }39  console.log(`Bytes used: ${usedBytes / totalBytes * 100}%`);40  fs.writeFileSync('jsCoverage.json', JSON.stringify(coverage));41  await browser.close();42})();43const puppeteer = require('puppeteer');44const fs = require('fs');45(async () => {46  const browser = await puppeteer.launch({47  });48  const page = await browser.newPage();

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