How to use isRegExp method in Playwright Internal

Best JavaScript code snippet using playwright-internal

is.js

Source: is.js

2var assert   = require("chai").assert3  , isRegExp = require("../../reg-exp/is");4describe("reg-exp/is", function () {5	it("Should return true on regular expression", function () {6		assert.equal(isRegExp(/foo/), true);7	});8	it("Should return false on native regular expression with no common API exposed", function () {9		var re = /foo/;10		re.test = null;11		assert.equal(isRegExp(re), false);12	});13	it("Should return false on RegExp.prototype", function () {14		assert.equal(isRegExp(RegExp.prototype), false);15	});16	it("Should return false on regexp like string", function () {17		assert.equal(isRegExp("/foo/"), false);18	});19	it("Should return false on plain object", function () { assert.equal(isRegExp({}), false); });20	it("Should return false on function", function () {21		assert.equal(isRegExp(function () { return true; }), false);22	});23	it("Should return false on array", function () { assert.equal(isRegExp([]), false); });24	if (typeof Object.create === "function") {25		it("Should return false on object with no prototype", function () {26			assert.equal(isRegExp(Object.create(null)), false);27		});28	}29	it("Should return false on string", function () { assert.equal(isRegExp("foo"), false); });30	it("Should return false on empty string", function () { assert.equal(isRegExp(""), false); });31	it("Should return false on number", function () { assert.equal(isRegExp(123), false); });32	it("Should return false on NaN", function () { assert.equal(isRegExp(NaN), false); });33	it("Should return false on boolean", function () { assert.equal(isRegExp(true), false); });34	if (typeof Symbol === "function") {35		it("Should return false on symbol", function () {36			assert.equal(isRegExp(Symbol("foo")), false);37		});38	}39	it("Should return false on null", function () { assert.equal(isRegExp(null), false); });40	it("Should return false on undefined", function () { assert.equal(isRegExp(void 0), false); });...

isRegExp.js

Source: isRegExp.js

...5import Symbol from './shared/Symbol';6describe('isRegExp', function () {7  context('given a `RegExp` value', function () {8    specify('should return true', function () {9      assert.isTrue(RA.isRegExp(new RegExp()));10      assert.isTrue(RA.isRegExp(/(?:)/));11    });12  });13  context('given a non `RegExp` value', function () {14    specify('should return false', function () {15      assert.isFalse(RA.isRegExp('a'));16      assert.isFalse(RA.isRegExp(1));17      assert.isFalse(RA.isRegExp([]));18      assert.isFalse(RA.isRegExp({}));19      assert.isFalse(RA.isRegExp(true));20      assert.isFalse(RA.isRegExp(false));21      assert.isFalse(RA.isRegExp(new Error()));22      assert.isFalse(RA.isRegExp(new Date()));23      assert.isFalse(RA.isRegExp(function () {}));24      assert.isFalse(RA.isRegExp(Object(0)));25      assert.isFalse(RA.isRegExp(Object('a')));26      assert.isFalse(RA.isRegExp(Object(false)));27      assert.isFalse(RA.isRegExp(RA));28      assert.isFalse(RA.isRegExp(args));29      if (Symbol !== 'undefined') {30        assert.isFalse(RA.isRegExp(Symbol));31      }32      assert.isFalse(RA.isRegExp(null));33      assert.isFalse(RA.isRegExp(undefined));34    });35  });36  it('should support placeholder to specify "gaps"', function () {37    const isRegExp = RA.isRegExp(R.__);38    assert.isFalse(isRegExp(1));39  });...

isRegExp.test.js

Source: isRegExp.test.js

...3import { falsey, stubFalse, args, slice, symbol, realm } from './utils.js';4import isRegExp from '../isRegExp.js';5describe('isRegExp', function() {6  it('should return `true` for regexes', function() {7    assert.strictEqual(isRegExp(/x/), true);8    assert.strictEqual(isRegExp(RegExp('x')), true);9  });10  it('should return `false` for non-regexes', function() {11    var expected = lodashStable.map(falsey, stubFalse);12    var actual = lodashStable.map(falsey, function(value, index) {13      return index ? isRegExp(value) : isRegExp();14    });15    assert.deepStrictEqual(actual, expected);16    assert.strictEqual(isRegExp(args), false);17    assert.strictEqual(isRegExp([1, 2, 3]), false);18    assert.strictEqual(isRegExp(true), false);19    assert.strictEqual(isRegExp(new Date), false);20    assert.strictEqual(isRegExp(new Error), false);21    assert.strictEqual(isRegExp(_), false);22    assert.strictEqual(isRegExp(slice), false);23    assert.strictEqual(isRegExp({ 'a': 1 }), false);24    assert.strictEqual(isRegExp(1), false);25    assert.strictEqual(isRegExp('a'), false);26    assert.strictEqual(isRegExp(symbol), false);27  });28  it('should work with regexes from another realm', function() {29    if (realm.regexp) {30      assert.strictEqual(isRegExp(realm.regexp), true);31    }32  });...

Using AI Code Generation

1const { isRegExp } = require('playwright/lib/utils/utils');2const { isRegExp } = require('playwright/lib/utils/utils');3const { isRegExp } = require('playwright/lib/utils/utils');4## 2. isRegExp() method5isRegExp(value)6### Example 1: Checking a value using isRegExp()7const { isRegExp } = require('playwright/lib/utils/utils');8console.log(isRegExp(/test/));9console.log(isRegExp(new RegExp('test')));10console.log(isRegExp('test'));11console.log(isRegExp(1));12console.log(isRegExp({}));13### Example 2: Checking a value using isRegExp() in Playwright14const { isRegExp } = require('playwright/lib/utils/utils');15const { isRegExp } = require('playwright/lib/utils/utils');16const { isRegExp } = require('playwright/lib/utils/utils');17## 3. isString() method18isString(value)19### Example 1: Checking a value using isString()20const { isString } = require('playwright/lib/utils/utils');21console.log(isString('test'));22console.log(isString(new String('test')));23console.log(isString(/test/));

Using AI Code Generation

1const { isRegExp } = require('@playwright/test/lib/utils/utils');2const { expect } = require('@playwright/test');3expect.extend({4  toBeRegExp(received) {5    const pass = isRegExp(received);6    if (pass) {7      return {8        message: () => `expected ${received} not to be a RegExp`,9      };10    } else {11      return {12        message: () => `expected ${received} to be a RegExp`,13      };14    }15  },16});17test('isRegExp method of Playwright Internal API', () => {18  expect(/abc/).toBeRegExp();19  expect('abc').not.toBeRegExp();20});21test('isRegExp method of Playwright Internal API', () => {22  expect(/abc/).toBeRegExp();23  expect('abc').not.toBeRegExp();24});

Using AI Code Generation

1const { isRegExp } = require("@playwright/test/lib/utils/utils");2const { test } = require("@playwright/test");3test("test", async ({ page }) => {4  await page.click('text=Docs');5  await page.click('text=API');6  await page.click('text=Pag

Using AI Code Generation

1const { isRegExp } = require('@playwright/test/lib/utils/utils');2const { isRegExp } = require('@playwright/test/lib/utils/utils');3function checkRegExpOrNot(arg1, arg2) {4  if (isRegExp(arg1)) {5    return arg1.test(arg2);6  } else {7    return arg2.includes(arg1);8  }9}

Using AI Code Generation

1const { isRegExp } = require('playwright/lib/utils/utils');2const reg = new RegExp('google.com');3console.log(isRegExp(reg));4const { isRegExp } = require('playwright');5const reg = new RegExp('google.com');6console.log(isRegExp(reg));7The Playwright project welcomes contributions from the community. Before submitting a pull request, please read our [contributing guide](

StackOverFlow community discussions

Questions

Discussion

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

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

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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

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

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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