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How to use pruneCache method in Playwright Internal

Best JavaScript code snippet using playwright-internal

baseKeepAlive.js

...53  /* istanbul ignore next */54  return false55}5657function pruneCache(keepAliveInstance, filter) {58  const { cache, keys, _vnode } = keepAliveInstance59  for (const key in cache) {60    const cachedNode = cache[key]61    if (cachedNode) {62      // ------------ 3. ä¹åé»è®¤ä»router-viewåå¨åkeyå¼, ç°å¨æ¹ä¸ºè·¯ç±name, æä»¥è¿éå¾æ¹æå½åkey63      // const name = getComponentName.call(keepAliveInstance, cachedNode.componentOptions)64      const name = key65      if (name && !filter(name)) {66        pruneCacheEntry(cache, key, keys, _vnode)67      }68    }69  }70}7172function pruneCacheEntry(73  cache,74  key,75  keys,76  current77) {78  const cached = cache[key]79  if (cached && (!current || cached.tag !== current.tag)) {80    cached.componentInstance.$destroy()81  }82  cache[key] = null83  remove(keys, key)84}8586const patternTypes = [String, RegExp, Array]8788export default {89  name: 'keep-alive',90  // abstract: true,91  props: {92    include: patternTypes,93    exclude: patternTypes,94    max: [String, Number]95  },9697  created() {98    this.cache = Object.create(null)99    this.keys = []100  },101102  destroyed() {103    for (const key in this.cache) {104      pruneCacheEntry(this.cache, key, this.keys)105    }106  },107108  mounted() {109    this.$watch('include', val => {110      pruneCache(this, name => matches(val, name))111    })112    this.$watch('exclude', val => {113      pruneCache(this, name => !matches(val, name))114    })115  },116117  render() {118    const slot = this.$slots.default119    const vnode = getFirstComponentChild(slot)120    const componentOptions = vnode && vnode.componentOptions121    if (componentOptions) {122      // check pattern123      const name = getComponentName.call(this, componentOptions)124      // ---------- å¯¹äºæ²¡ænameå¼å¾è®¾ç½®ä¸ºè·¯ç±å¾name, æ¯ævue-devtoolç»ä»¶åç§°æ¾ç¤º125      if (!componentOptions.Ctor.options.name) {126        vnode.componentOptions.Ctor.options.name127      }
...

AKeepAlive.js

Source: AKeepAlive.js

...38      }39    }40  }41}42function pruneCache(keepAliveInstance, filter) {43  const { cache, keys, _vnode } = keepAliveInstance;44  for (const key in cache) {45    const cachedNode = cache[key];46    if (cachedNode) {47      const name = getComponentName(cachedNode.componentOptions);48      const componentKey = getComponentKey(cachedNode);49      if (name && !filter(name, componentKey)) {50        pruneCacheEntry(cache, key, keys, _vnode);51      }52    }53  }54}55function pruneCacheEntry2(cache, key, keys) {56  const cached = cache[key];57  if (cached) {58    cached.componentInstance.$destroy();59  }60  cache[key] = null;61  remove(keys, key);62}63function pruneCacheEntry(cache, key, keys, current) {64  const cached = cache[key];65  if (cached && (!current || cached.tag !== current.tag)) {66    cached.componentInstance.$destroy();67  }68  cache[key] = null;69  remove(keys, key);70}71export default {72  name: 'AKeepAlive',73  abstract: true,74  model: {75    prop: 'clearCaches',76    event: 'clear'77  },78  props: {79    include: patternTypes,80    exclude: patternTypes,81    excludeKeys: patternTypes,82    max: [String, Number],83    clearCaches: Array84  },85  watch: {86    clearCaches: function(val) {87      if (val && val.length > 0) {88        const { cache, keys } = this;89        val.forEach(key => {90          pruneCacheEntry2(cache, key, keys);91        });92        this.$emit('clear', []);93      }94    }95  },96  created() {97    this.cache = Object.create(null);98    this.keys = [];99  },100  destroyed() {101    for (const key in this.cache) {102      pruneCacheEntry(this.cache, key, this.keys);103    }104  },105  mounted() {106    this.$watch('include', val => {107      pruneCache(this, (name) => matches(val, name));108    });109    this.$watch('exclude', val => {110      pruneCache(this, (name) => !matches(val, name));111    });112    this.$watch('excludeKeys', val => {113      pruneCache(this, (name, key) => !matches(val, key));114    });115  },116  render() {117    const slot = this.$slots.default;118    const vnode = getFirstComponentChild(slot);119    const componentOptions = vnode && vnode.componentOptions;120    if (componentOptions) {121      // check pattern122      const name = getComponentName(componentOptions);123      const componentKey = getComponentKey(vnode);124      const { include, exclude, excludeKeys } = this;125      if (126        // not included127        (include && (!name || !matches(include, name))) ||...

cache.js

Source: cache.js

...67  t.false(stubbedWrite.called);68});69test.serial('pruneCache is a noop if cacheDir is not provided', (t) => {70  t.notThrows(() => {71    cache.pruneCache('invalidbutunused', 'alsoinvalidbutunused', undefined);72  });73});74test.serial('pruneCache removes cache files that are unused', (t) => {75  cache.pruneCache(['usedKey'], ['usedKey', 'unusedKey1', 'unusedKey2'], 'cacheDir');76  t.true(stubbedDelete.calledWith(path.join('cacheDir', 'unusedKey1.js')));77  t.true(stubbedDelete.calledWith(path.join('cacheDir', 'unusedKey2.js')));78  t.false(stubbedDelete.calledWith(path.join('cacheDir', 'usedKey.js')));79});80test.serial('getCacheKeysFromDisk returns the filename of js files in the cacheDir', (t) => {81  const result = cache.getCacheKeysFromDisk('doesnotmatter');82  t.is(result[0], 'path1');83  t.is(result[1], 'path2');84});85test.serial('getCacheKeysFromDisk returns an emtpy array if a cacheDir is not provided', (t) => {86  const result = cache.getCacheKeysFromDisk(undefined);87  t.deepEqual(result, []);...

keep-alive.js

Source: keep-alive.js

...13  }14  /* istanbul ignore next */15  return false16}17function pruneCache(cache: VNodeCache, current: VNode, filter: Function) {18  for (const key in cache) {19    const cachedNode: ?VNode = cache[key]20    if (cachedNode) {21      const name: ?string = getComponentName(cachedNode.componentOptions)22      if (name && !filter(name)) {23        if (cachedNode !== current) {24          pruneCacheEntry(cachedNode)25        }26        cache[key] = null27      }28    }29  }30}31function pruneCacheEntry(vnode: ?VNode) {32  if (vnode) {33    vnode.componentInstance.$destroy()34  }35}36export default {37  name: 'keep-alive',38  abstract: true,39  props: {40    include: patternTypes,41    exclude: patternTypes,42  },43  created() {44    this.cache = Object.create(null)45  },46  destroyed() {47    for (const key in this.cache) {48      pruneCacheEntry(this.cache[key])49    }50  },51  watch: {52    include(val: string | RegExp) {53      pruneCache(this.cache, this._vnode, name => matches(val, name))54    },55    exclude(val: string | RegExp) {56      pruneCache(this.cache, this._vnode, name => !matches(val, name))57    },58  },59  render() {60    const vnode: VNode = getFirstComponentChild(this.$slots.default)61    const componentOptions: ?VNodeComponentOptions =62      vnode && vnode.componentOptions63    if (componentOptions) {64      // check pattern65      const name: ?string = getComponentName(componentOptions)66      if (67        name &&68        ((this.include && !matches(this.include, name)) ||69          (this.exclude && matches(this.exclude, name)))70      ) {...

tasks-travis.yml.js

Source: tasks-travis.yml.js

...8test('isNeeded()', async () => {9  const result = await isNeeded({ cwd: process.cwd(), scope: '' });10  expect(typeof result).toBe('boolean');11});12test('pruneCache({}, { hasYarn: false })', () => {13  const results = pruneCache({});14  expect(results).toMatchSnapshot();15});16test('pruneInstall({ ... }, { hasYarn: false })', () => {17  const results = pruneInstall(18    {19      install: ['npm install --global yarn'],20    },21    { hasYarn: false },22  );23  expect(results).toMatchSnapshot();24});25test('pruneInstall({ ... }, { hasYarn: true })', () => {26  const results = pruneInstall(27    {...

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 context.close();7  await browser.close();8  await context.pruneCache(

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  await context.close();7  await browser.close();8  await browser._defaultContext._browser._browserContext._options._browser._options._channel.pruneBrowserCache();9  await browser._defaultContext._browser._browserContext._options._browser._options._channel.pruneBrowserCookies();10  await browser._defaultContext._browser._browserContext._options._browser._options._channel.pruneBrowserCaches();11})();

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 browser.close();7  console.log("Browser closed");8  await context._browser._defaultContext._options.recordVideo.dir._pruneCache();9  console.log("Cache cleared");10})();11{12  "scripts": {13  },14  "dependencies": {15  }16}17{18  "dependencies": {19    "playwright": {20      "requires": {

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: 'example.png' });7  await browser.close();8})();9    at Page._onClose (/home/raghavendra/Desktop/playwright/node_modules/playwright/lib/server/page.js:63:24)10    at CDPSession.Page.client.on.event (/home/raghavendra/Desktop/playwright/node_modules/playwright/lib/server/page.js:53:63)11    at CDPSession.emit (events.js:315:20)12    at CDPSession._onMessage (/home/raghavendra/Desktop/playwright/node_modules/playwright/lib/server/cdpsession.js:121:10)13    at Connection._onMessage (/home/raghavendra/Desktop/playwright/node_modules/playwright/lib/server/connection.js:200:24)14    at WebSocketTransport._ws.addEventListener.event (/home/raghavendra/Desktop/playwright/node_modules/playwright/lib/server/webSocketTransport.js:44:24)15    at WebSocket.onMessage (/home/raghavendra/Desktop/playwright/node_modules/ws/lib/event-target.js:132:16)16    at WebSocket.emit (events.js:315:20)17    at Receiver.receiverOnMessage (/home/raghavendra/Desktop/playwright/node_modules/ws/lib/websocket.js:800:20)18    at Receiver.emit (events.js:315:20)

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: 'example.png' });7  await page.close();8  await context.close();9  await browser.close();10  await browser._channel.pruneBrowserContexts();11})();12const playwright = require('playwright');

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3    const browser = await chromium.launch();4    const context = await browser.newContext();5    await context.tracing.start({ screenshots: true, snapshots: true });6    const page = await context.newPage();7    await page.type('input[title="Search"]', 'Playwright');8    await page.click('text=Google Search');9    await page.waitForLoadState();10    await page.screenshot({ path: `example.png` });11    await context.tracing.stop({ path: 'trace.zip' });12    await browser.close();13})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { pruneCache } = require('playwright/lib/server/chromium/crBrowser');3const browser = await chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6await pruneCache();7await browser.close();8const { chromium } = require('playwright');9const { clearBrowserData } = require('playwright/lib/server/chromium/crBrowser');10const browser = await chromium.launch();11const context = await browser.newContext();12const page = await context.newPage();13await clearBrowserData();14await browser.close();15const { chromium } = require('playwright');16const { clearBrowserCache } = require('playwright/lib/server/chromium/crBrowser');17const browser = await chromium.launch();18const context = await browser.newContext();19const page = await context.newPage();20await clearBrowserCache();21await browser.close();22const { chromium } = require('playwright');23const { clearBrowserCookies } = require('playwright/lib/server/chromium/crBrowser');24const browser = await chromium.launch();25const context = await browser.newContext();26const page = await context.newPage();27await clearBrowserCookies();28await browser.close();29const { chromium } = require('playwright');30const { clearBrowserHistory } = require('playwright/lib/server/chromium/crBrowser');31const browser = await chromium.launch();32const context = await browser.newContext();33const page = await context.newPage();34await clearBrowserHistory();35await browser.close();36const { chromium } = require('playwright');37const { clearBrowserPasswords } = require('playwright/lib/server/chromium/crBrowser');38const browser = await chromium.launch();39const context = await browser.newContext();40const page = await context.newPage();41await clearBrowserPasswords();42await browser.close();

Using AI Code Generation

1const { chromium } = require('playwright');2const { pruneCache } = require('playwright/lib/server/browserType');3(async () => {4  const browser = await chromium.launch();5  await pruneCache(browser);6})();7const { chromium } = require('playwright');8const { pruneCache } = require('playwright/lib/server/browserType');9(async () => {10  const browser = await chromium.launch();11  await pruneCache(browser);12})();13    at Chromium._wrapApiCall (/Users/saransh/Projects/playwright/playwright/lib/server/chromium.js:103:15)14    at async Chromium.close (/Users/saransh/Projects/playwright/playwright/lib/server/chromium.js:268:16)15    at async pruneCache (/Users/saransh/Projects/playwright/playwright/lib/server/browserType.js:82:5)16    at async Object.<anonymous> (/Users/saransh/Projects/playwright/test2.js:6:3)17    at async ModuleJob.run (internal/modules/esm/module_job.js:152:23)18    at async async Promise.all (index 0)19    at async ESMLoader.import (internal/modules/esm/loader.js:166:24)20    at async loadESM (internal/process/esm_loader.js:68:5)21    at async handleMainPromise (internal/modules/run_main.js:60:12) {22}

Using AI Code Generation

1const { chromium } = require('playwright');2const { pruneCache } = require('playwright/lib/utils/pruneCache');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.screenshot({ path: `example.png` });8  await browser.close();9  await pruneCache();10})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { pruneCache } = require('playwright/lib/server/browserType');3const browserType = chromium;4(async () => {5  const browser = await browserType.launch({headless: false});6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.screenshot({path: 'google.png'});9  await browser.close();10  await pruneCache(browserType);11})();

StackOverFlow community discussions

Questions

Discussion

How to run a list of test suites in a single file concurrently in jest?

firefox browser does not start in playwright

Jest + Playwright - Test callbacks of event-based DOM library

Is it possible to get the selector from a locator object in playwright?

Running Playwright in Azure Function

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})

https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

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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.