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How to use resolveFilename method in Playwright Internal

Best JavaScript code snippet using playwright-internal

tsconfig-paths.cjs

1/**2 * @file Helpers - tsconfigPaths3 * @module tools/helpers/tsconfigPaths4 */5const path = require('path')6const { loadSync: tsconfig } = require('tsconfig/dist/tsconfig')7const { ExplicitParams } = require('tsconfig-paths/lib/config-loader')8const matchSpecifier = require('./match-specifier.cjs')9/**10 * Installs a custom module load function that can adhere to paths in tsconfig.11 *12 * @param {ExplicitParams} [explicitParams] - Tsconfig path mapping options13 * @return {() => void} Function to undo paths registration14 */15function register(explicitParams) {16  // Resolve cjs directory index files17  require.extensions['.cjs'] = require.extensions['.js']18  // Get original node module and resolveFilename function19  const Module = require('module')20  const resolveFilename = Module._resolveFilename21  /**22   * Patches node's module loading.23   *24   * @param {string} specifier - Module specifier25   * @param {NodeJS.Module | null} parent - Module that imported `specifier`26   * @return {string} Resolved file URL27   */28  Module._resolveFilename = function (specifier, parent) {29    const CORE_MODULE = !!register.coreModules(Module.builtinModules)[specifier]30    let args = arguments31    if (!CORE_MODULE) {32      try {33        // Get match context34        const ctx = { parentURL: parent ? parent.id : undefined }35        // Attempt to resolve specifier using path mappings36        const match = matchSpecifier(specifier, ctx, explicitParams)37        // Update specifier if match was found38        if (match !== specifier) {39          args = [match, ...Array.prototype.slice.call(args, 1)]40        }41      } catch (e) {42        console.error(`${e.message}. tsconfig-paths skipped`)43        return () => void 044      }45    }46    return resolveFilename.apply(this, args)47  }48  // Restore node's module loading to original state49  return () => {50    Module._resolveFilename = resolveFilename51  }52}53/**54 * Returns a map containing defined core modules.55 *56 * @param {string[]} [builtins] - Names of builtin core modules57 * @return {Record<string, boolean>} Core module map58 */59register.coreModules = builtins => {60  builtins = builtins ?? [61    'assert',62    'buffer',63    'child_process',64    'cluster',65    'crypto',66    'dgram',67    'dns',68    'domain',69    'events',70    'fs',71    'http',72    'https',73    'net',74    'os',75    'path',76    'punycode',77    'querystring',78    'readline',79    'stream',80    'string_decoder',81    'tls',82    'tty',83    'url',84    'util',85    'v8',86    'vm',87    'zlib'88  ]89  const core = {}90  for (const mod of builtins) core[mod] = true91  return core92}93const baseUrl = path.resolve(__dirname, '..', '..')94register({95  addMatchAll: true,96  baseUrl,97  mainFields: ['main'],98  paths: tsconfig(baseUrl, 'tsconfig.json').config.compilerOptions.paths...

resolveFilename.test.js

Source: resolveFilename.test.js

...5var testFolder = path.join(__dirname, "resolveFilename");6describe("resolveFilename", function () {7    describe("alamid requires", function () {8        it("should handle a require from the alamid server folder", function () {9            expect(resolveFilename(path.join(testFolder, "alamid", "lib", "server", "env.server.js"))).to10                .be(path.join(testFolder, "alamid", "lib", "client", "env.client.js"));11        });12        it("should handle a require from the alamid core folder", function () {13            expect(resolveFilename(path.join(testFolder, "alamid", "lib", "core", "logger.server.js"))).to14                .be(path.join(testFolder, "alamid", "lib", "client", "logger.client.js"));15        });16        it("should map the index.server.js", function () {17            expect(resolveFilename(path.join(testFolder, "alamid", "lib", "index.server.js"))).to18                .be(path.join(testFolder, "alamid", "lib", "index.client.js"));19        });20    });21    describe("app requires", function () {22        it("should return a client-file as replacement for a server-file if existent", function () {23            expect(resolveFilename(path.join(testFolder, "config.server.js"))).to24                .be(path.join(testFolder, "config.client.js"));25        });26        it("should return a client-file as replacement for a server-file if existent (for class files)", function () {27            expect(resolveFilename(path.join(testFolder, "logger.server.class.js"))).to28                .be(path.join(testFolder, "logger.client.class.js"));29        });30        it("should return shared files without env-specific file-ending", function () {31            expect(resolveFilename(path.join(testFolder, "index.js"))).to32                .be(path.join(testFolder, "index.js"));33        });34        it("should return shared files if existent (.class ending)", function () {35            expect(resolveFilename(path.join(testFolder, "modelCache.server.class.js"))).to36                .be(path.join(testFolder, "modelCache.class.js"));37        });38        it("should fail if a server-file is being required without client or shared replacement", function () {39            expect(function () {40                resolveFilename(path.join(testFolder, "serverOnly.server.js"));41            }).to.throwError();42        });43    });...

index.js

Source: index.js

...9		throw new TypeError(`Expected \`moduleId\` to be of type \`string\`, got \`${typeof moduleId}\``);10	}11	fromDir = path.resolve(fromDir);12	const fromFile = path.join(fromDir, 'noop.js');13	const resolveFileName = () => Module._resolveFilename(moduleId, {14		id: fromFile,15		filename: fromFile,16		paths: Module._nodeModulePaths(fromDir)17	});18	if (silent) {19		try {20			return resolveFileName();21		} catch (err) {22			return null;23		}24	}25	return resolveFileName();26};27module.exports = (fromDir, moduleId) => resolveFrom(fromDir, moduleId);...

Using AI Code Generation

1const { resolveFilename } = require('playwright/lib/utils/utils');2const fs = require('fs');3const path = require('path');4const filePath = resolveFilename(path.join(__dirname, 'test.txt'));5fs.writeFileSync(filePath, 'Hello World');6const { resolveFilename } = require('playwright/lib/utils/utils');7const fs = require('fs');8const path = require('path');9const storageStatePath = resolveFilename(path.join(__dirname, 'storageState.json'));10const browser = await playwright.chromium.launch({ headless: false });11const context = await browser.newContext({ storageStatePath });12{13    {14    }15    {16        {17        }18    }19}20const { resolveFilename } = require('playwright/lib/utils/utils');21const fs = require('fs');22const path = require('path');23const browser = await playwright.chromium.launch({ headless: false });24const context = await browser.newContext();25const filePath = resolveFilename(path.join(__dirname, 'test.txt'));26await context.addInitScript({ path: filePath });27await context.addInitScript({ content: 'console.log("Hello World")' });

Using AI Code Generation

1const path = require('path');2const { chromium } = require('playwright');3const { resolveFilename } = require('playwright/lib/server/browserContext');4const { mkdtempAsync, removeFolderAsync } = require('playwright/lib/utils/utils');5const { getTestState } = require('playwright/lib/server/test');6const { downloadPath } = getTestState();7(async () => {8  const browser = await chromium.launch();9  const context = await browser.newContext({ acceptDownloads: true });10  const page = await context.newPage();11  const tempDir = await mkdtempAsync(path.join(downloadPath, 'download-'));12  await page.route('**/*', async (route, request) => {13    const url = request.url();14    const file = resolveFilename(url, tempDir);15    await route.fulfill({ body: 'Hello world', headers: { 'content-type': 'text/plain' }, path: file });16  });17  await page.click('text=Get started');18  const [download] = await Promise.all([19    page.waitForEvent('download'),20    page.click('text=Download for Linux')21  ]);22  await download.path();23  await browser.close();24  await removeFolderAsync(tempDir);25})();26{27  "scripts": {28  },29  "dependencies": {30  }31}

Using AI Code Generation

1const { resolveFilename } = require('playwright/lib/utils/utils');2const path = require('path');3const resolvedPath = resolveFilename('test.html', path.join(__dirname, 'test.html'));4console.log(resolvedPath);5const test = require('./test.js');6const { testRunner } = require('@playwright/test');7const { expect } = require('@playwright/test');8test('test', async ({ page }) => {9  const actual = await page.textContent('body');10  expect(actual).toBe('test');11});

Using AI Code Generation

1const { Playwright } = require('playwright');2const playwright = new Playwright();3const { webkit } = playwright;4const { WebKit } = webkit;5const webkitBrowser = new WebKit();6const { WebKitBrowser } = webkitBrowser;7const webkitBrowserContext = new WebKitBrowser();8const { WebKitBrowserContext } = webkitBrowserContext;9const webkitPage = new WebKitBrowserContext();10const { WebKitPage } = webkitPage;11(async () => {12    const browser = await webkit.launch();13    const context = await browser.newContext();14    const page = await context.newPage();15    const filename = WebKitPage.resolveFilename('test.js');16    console.log(filename);17    await browser.close();18})();19Recommended Posts: Playwright | resolvePath() method20Playwright | resolveExecutablePath() method

Using AI Code Generation

1const { resolveFilename } = require('playwright/lib/utils/utils');2const path = require('path');3const pathToExecutable = resolveFilename(path.join('..', 'lib', 'server', 'chromium', 'download', 'chromium-869685.js'));4console.log(pathToExecutable);5const { resolveExecutablePath } = require('playwright/lib/utils/utils');6const pathToExecutable = resolveExecutablePath('chromium');7console.log(pathToExecutable);8const { downloadBrowserWithProgressBar } = require('playwright/lib/utils/utils');9downloadBrowserWithProgressBar('chromium', '869685', 'chromium-869685.js', undefined, undefi

Using AI Code Generation

1const { resolveFilename } = require('playwright/lib/utils/utils');2const path = require('path');3const test = async () => {4  const filePath = await resolveFilename('test.txt');5  console.log(filePath);6};7test();8const { resolveFilename } = require('playwright/lib/utils/utils');9const path = require('path');10const test = async () => {11  const filePath = await resolveFilename('test.txt');12  console.log(filePath);13};14const test1 = async () => {15  const filePath = await resolveFilename('test.txt', path.join(__dirname, 'test.js'));16  console.log(filePath);17};18test();19test1();

Using AI Code Generation

1const { resolveFilename } = require('playwright/lib/utils/utils');2const fs = require('fs');3const path = require('path');4const fileName = resolveFilename('test.txt', path.join(__dirname, 'test.txt'));5fs.writeFileSync(fileName, 'test content');6{7  "scripts": {8  },9  "dependencies": {10  }11}

Using AI Code Generation

1const { resolveFilename } = require('playwright/lib/server/folders');2const path = require('path');3const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));4console.log(resolvedPath);5const { resolveFilename } = require('playwright/lib/server/folders');6const path = require('path');7const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));8console.log(resolvedPath);9const { resolveFilename } = require('playwright/lib/server/folders');10const path = require('path');11const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));12console.log(resolvedPath);13const { resolveFilename } = require('playwright/lib/server/folders');14const path = require('path');15const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));16console.log(resolvedPath);17const { resolveFilename } = require('playwright/lib/server/folders');18const path = require('path');19const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));20console.log(resolvedPath);21const { resolveFilename } = require('playwright/lib/server/folders');22const path = require('path');23const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));24console.log(resolvedPath);25const { resolveFilename } = require('playwright/lib/server/folders');26const path = require('path');27const resolvedPath = resolveFilename('test.js', path.resolve(__dirname, 'test.js'));28console.log(resolvedPath);29const { resolveFilename } = require('playwright/lib/server/folders');30const path = require('path');31const resolvedPath = resolveFilename('test.js', path.resolve(__

StackOverFlow community discussions

Questions

Discussion

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

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

Running Playwright in Azure Function

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

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

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