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How to use resolveFunctionForHotReloading method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberHotReloading.js

1/**2 * Copyright (c) Facebook, Inc. and its affiliates.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 *7 *      8 */9import {enableNewReconciler} from 'shared/ReactFeatureFlags';10             11         12                13                    14                  15               16                              17                                  18import {19  setRefreshHandler as setRefreshHandler_old,20  resolveFunctionForHotReloading as resolveFunctionForHotReloading_old,21  resolveClassForHotReloading as resolveClassForHotReloading_old,22  resolveForwardRefForHotReloading as resolveForwardRefForHotReloading_old,23  isCompatibleFamilyForHotReloading as isCompatibleFamilyForHotReloading_old,24  markFailedErrorBoundaryForHotReloading as markFailedErrorBoundaryForHotReloading_old,25  scheduleRefresh as scheduleRefresh_old,26  scheduleRoot as scheduleRoot_old,27  findHostInstancesForRefresh as findHostInstancesForRefresh_old,28} from './ReactFiberHotReloading.old';29import {30  setRefreshHandler as setRefreshHandler_new,31  resolveFunctionForHotReloading as resolveFunctionForHotReloading_new,32  resolveClassForHotReloading as resolveClassForHotReloading_new,33  resolveForwardRefForHotReloading as resolveForwardRefForHotReloading_new,34  isCompatibleFamilyForHotReloading as isCompatibleFamilyForHotReloading_new,35  markFailedErrorBoundaryForHotReloading as markFailedErrorBoundaryForHotReloading_new,36  scheduleRefresh as scheduleRefresh_new,37  scheduleRoot as scheduleRoot_new,38  findHostInstancesForRefresh as findHostInstancesForRefresh_new,39} from './ReactFiberHotReloading.new';40export const setRefreshHandler = enableNewReconciler41  ? setRefreshHandler_new42  : setRefreshHandler_old;43export const resolveFunctionForHotReloading = enableNewReconciler44  ? resolveFunctionForHotReloading_new45  : resolveFunctionForHotReloading_old;46export const resolveClassForHotReloading = enableNewReconciler47  ? resolveClassForHotReloading_new48  : resolveClassForHotReloading_old;49export const resolveForwardRefForHotReloading = enableNewReconciler50  ? resolveForwardRefForHotReloading_new51  : resolveForwardRefForHotReloading_old;52export const isCompatibleFamilyForHotReloading = enableNewReconciler53  ? isCompatibleFamilyForHotReloading_new54  : isCompatibleFamilyForHotReloading_old;55export const markFailedErrorBoundaryForHotReloading = enableNewReconciler56  ? markFailedErrorBoundaryForHotReloading_new57  : markFailedErrorBoundaryForHotReloading_old;58export const scheduleRefresh = enableNewReconciler59  ? scheduleRefresh_new60  : scheduleRefresh_old;61export const scheduleRoot = enableNewReconciler62  ? scheduleRoot_new63  : scheduleRoot_old;64export const findHostInstancesForRefresh = enableNewReconciler65  ? findHostInstancesForRefresh_new...

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/server/browserContext.js');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.screenshot({ path: 'example.png' });8  const resolvedFunction = resolveFunctionForHotReloading(() => console.log('Hello world!'));9  resolvedFunction();10  await browser.close();11})();12Your name to display (optional):13Your name to display (optional):14Your name to display (optional):

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');2const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');3const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');4const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');5const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');6const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');7const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');8const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');9const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');10const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');11const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');12const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');13const { resolveFunctionForHotReloading } = require('playwright/lib/utils/hotreloader');

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/client/inspectorInstrumentation');2const { firefox } = require('playwright');3(async () => {4  const browser = await firefox.launch();5  const page = await browser.newPage();6  const { context, page: page1 } = await page.context();7  const { context: context1, page: page2 } = await page.context();8  const { context: context2, page: page3 } = await page.context();9  const { context: context3, page: page4 } = await page.context();10  const { context: context4, page: page5 } = await page.context();11  const { context: context5, page: page6 } = await page.context();12  const { context: context6, page: page7 } = await page.context();13  const { context: context7, page: page8 } = await page.context();14  const { context: context8, page: page9 } = await page.context();15  const { context: context9, page: page10 } = await page.context();16  const { context: context10, page: page11 } = await page.context();17  const { context: context11, page: page12 } = await page.context();18  const { context: context12, page: page13 } = await page.context();19  const { context: context13, page: page14 } = await page.context();20  const { context: context14, page: page15 } = await page.context();21  const { context: context15, page

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright');2const { createRequire } = require('module');3const require = createRequire(import.meta.url);4const { test } = require('@playwright/test');5test('test', async ({ page }) => {6  const title = await page.title();7  expect(title).toBe('Playwright');8});9test('test2', async ({ page }) => {10  const title = await page.title();11  expect(title).toBe('Playwright');12});13test('test3', async ({ page }) => {14  const title = await page.title();15  expect(title).toBe('Playwright');16});17test('test4', async ({ page }) => {18  const title = await page.title();19  expect(title).toBe('Playwright');20});21test('test5', async ({ page }) => {22  const title = await page.title();23  expect(title).toBe('Playwright');24});25test('test6', async ({ page }) => {26  const title = await page.title();27  expect(title).toBe('Playwright');28});29test('test7', async ({ page }) => {30  const title = await page.title();31  expect(title).toBe('Playwright');32});33test('test8', async ({ page }) => {34  const title = await page.title();35  expect(title).toBe('Playwright');36});37test('test9', async ({ page }) => {

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');2const { helper } = require('playwright-core/lib/server/helper');3const { Page } = require('playwright-core/lib/server/page');4const { BrowserContext } = require('playwright-core/lib/server/browserContext');5const { Browser } = require('playwright-core/lib/server/browser');6const { DeviceDescriptors } = require('playwright-core/lib/server/deviceDescriptors');7const { WebServer } = require('playwright-core/lib/server/webServer');8const { WebSocketTransport } = require('playwright-core/lib/server/webSocketTransport');9const { BrowserServer } = require('playwright-core/lib/server/browserServer');10const { BrowserType } = require('playwright-core/lib/server/browserType');11const { ProgressController } = require('playwright-core/lib/server/progress');12const { CRBrowser } = require('playwright-core/lib/server/chromium/crBrowser');13const { CRBrowserContext } = require('playwright-core/lib/server/chromium/crBrowserContext');14const { CRPage } = require('playwright-core/lib/server/chromium/crPage');15const { resolveFunctionForHotReloading } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');16const { helper } = require('playwright-core/lib/server/helper');17const { Page } = require('playwright-core/lib/server/page');18const { BrowserContext } = require('playwright-core/lib/server/browserContext');19const { Browser } = require('playwright-core/lib/server/browser');20const { DeviceDescriptors } = require('playwright-core/lib/server/deviceDescriptors');21const { WebServer } = require('playwright-core/lib/server/webServer');22const { WebSocketTransport } = require('playwright-core/lib/server/webSocketTransport');23const { BrowserServer } = require('playwright-core/lib/server/browserServer');24const { BrowserType } = require('playwright-core/lib/server/browserType');25const { ProgressController } = require('playwright-core/lib/server/progress');26const { CRBrowser } = require('playwright-core/lib/server/chromium/crBrowser');27const { CRBrowserContext } = require('playwright-core/lib/server/chromium/crBrowserContext');28const { CRPage } = require('playwright-core/lib/server/ch

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/server/inspector/inspector');2const { chromium } = require('playwright');3const browser = await chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6const resolvedFunction = resolveFunctionForHotReloading(page, 'click');7const { test, expect } = require('@playwright/test');8test('My test', async ({ page }) => {9  await page.click('text=Submit');10});

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright.js');2const { Page } = require('playwright/lib/server/page.js');3const page = new Page(null, null, null, null);4const resolvedFunction = resolveFunctionForHotReloading(page, 'foo');5const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright.js');6const { Page } = require('playwright/lib/server/frames.js');7const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright.js');8const { Page } = require('playwright/lib/server/frames.js');9const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright.js');10const { Page } = require('playwright/lib/server/frames.js');11const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright.js');12const { Page } = require('playwright/lib/server/frames.js');13const { resolveFunctionForHotReloading } = require('playwright/lib/server/playwright.js');14const { Page } = require('playwright/lib/server/frames.js');15const { resolveFunctionForHotRel

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/utils/internal');2const path = require('path');3const internal = new (require('playwright/lib/utils/internal').Internal)({root: path.join(__dirname, 'node_modules')});4const resolved = resolveFunctionForHotReloading(internal, 'test');5console.log(resolved);6const { resolveFunctionForHotReloading } = require('playwright/lib/utils/internal');7const path = require('path');8const internal = new (require('playwright/lib/utils/internal').Internal)({root: path.join(__dirname, 'node_modules')});9const resolved = resolveFunctionForHotReloading(internal, 'test');10console.log(resolved);11const { resolveFunctionForHotReloading } = require('playwright/lib/utils/internal');12const path = require('path');13const internal = new (require('playwright/lib/utils/internal').Internal)({root: path.join(__dirname, 'node_modules')});14const resolved = resolveFunctionForHotReloading(internal, 'test');15console.log(resolved);16const { resolveFunctionForHotReloading } = require('playwright/lib/utils/internal');17const path = require('path');18const internal = new (require('playwright/lib/utils/internal').Internal)({root: path.join(__dirname, 'node_modules')});19const resolved = resolveFunctionForHotReloading(internal, 'test');20console.log(resolved);21const { resolveFunctionForHotReloading } = require('playwright/lib/utils/internal');22const path = require('path');23const internal = new (require('playwright/lib/utils/internal').Internal)({root: path.join(__dirname, 'node_modules')});24const resolved = resolveFunctionForHotReloading(internal, 'test');25console.log(resolved);

Using AI Code Generation

1const { resolveFunctionForHotReloading } = require('playwright/lib/server/injected/injectedScript');2const { parseFunction } = require('playwright/lib/utils/stackTrace');3const { getCallerFilePath } = require('playwright/lib/utils/utils');4const fs = require('fs');5const path = require('path');6const util = require('util');7const readFileAsync = util.promisify(fs.readFile);8(async () => {9  const callerFilePath = getCallerFilePath(__filename);10  const { name, location } = parseFunction('click');11  const { filePath, lineNumber, columnNumber } = await resolveFunctionForHotReloading(callerFilePath, name, location);12  console.log('filePath', filePath);13  console.log('lineNumber', lineNumber);14  console.log('columnNumber', columnNumber);15  const fileContent = await readFileAsync(filePath, 'utf-8');16  console.log('fileContent', fileContent);17})();18const { test } = require('@playwright/test');19test('basic test', async ({ page }) => {20  await page.click('text=Click me');21});22fileContent const { test } = require('@playwright/test');23test('basic test', async ({ page }) => {24  await page.click('text=Click me');25});

StackOverFlow community discussions

Questions

Discussion

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

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

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

firefox browser does not start in playwright

Running Playwright in Azure Function

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

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

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