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How to use flattenSpecs method in Playwright Internal

Best JavaScript code snippet using playwright-internal

flakiness2.js

...1349      <text font-weight=200 font-size=large x=${size} y=${size} text-anchor="middle" stroke="#333"  dy=".3em">${count}</text>1350    </svg>1351  `;1352}1353function flattenSpecs(suite, result = []) {1354  if (suite.suites) {1355    for (const child of suite.suites)1356      flattenSpecs(child, result);1357  }1358  for (const spec of suite.specs || [])1359    result.push(spec);1360  return result;1361}1362function StringToBool(text) {1363  text = text.trim().toLowerCase();1364  return text === 'yes' || text === 'true';1365}1366function renderAnnotation(annotationType) {1367  const bgcolors = {1368    'slow': 'grey',1369    'flaky': COLOR_VIOLET,1370    'fail': COLOR_RED,...

dashboard_compressed_v1.js

Source: dashboard_compressed_v1.js

...39          delete project.metadata.platform;40        projectNameToMetadata.set(project.name, project.metadata);41      }42    }43    for (const spec of flattenSpecs(report)) {44      let specs = files[spec.file];45      if (!specs) {46        specs = new Map();47        files[spec.file] = specs;48      }49      const specId = spec.file + '---' + spec.title + ' --- ' + spec.line;50      let specObject = specs.get(specId);51      if (!specObject) {52        specObject = {53          title: spec.title,54          line: spec.line,55          column: spec.column,56          tests: new Map(),57        };...

utils.js

Source: utils.js

...18const util = require('util');19const gzipAsync = util.promisify(zlib.gzip);20const gunzipAsync = util.promisify(zlib.gunzip);21const blobServiceClient = BlobServiceClient.fromConnectionString(process.env.AzureWebJobsStorage);22function flattenSpecs(suite, result = []) {23  if (suite.suites) {24    for (const child of suite.suites)25      flattenSpecs(child, result);26  }27  for (const spec of suite.specs || [])28    result.push(spec);29  return result;30}31class SimpleBlob {32  static async create(container, blobName) {33    const dashboardContainerClient = await blobServiceClient.getContainerClient(container);34    return new SimpleBlob(dashboardContainerClient, blobName);35  }36  constructor(containerClient, blobName) {37    this._blobClient = containerClient.getBlobClient(blobName);38    this._blockBlobClient = this._blobClient.getBlockBlobClient();39  }...

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  const specs = await page._client.send('Target.getSpecs');7  const flatSpecs = await page._client.send('Target.flattenSpecs', { specs });8  console.log(flatSpecs);9  await browser.close();10})();

Using AI Code Generation

1const { flattenSpecs } = require('@playwright/test/lib/test/runner');2const { TestType } = require('@playwright/test/lib/test/types');3const { Test } = require('@playwright/test/lib/test/test');4const { TestFixtures } = require('@playwright/test/lib/test/fixtures');5const { TestModifier } = require('@playwright/test/lib/test/testModifier');6const { TestSnapshotManager } = require('@playwright/test/lib/test/snapshot/snapshotManager');7const { TestSnapshotter } = require('@playwright/test/lib/test/snapshot/snapshotter');8const { TestSnapshotStorage } = require('@playwright/test/lib/test/snapshot/snapshotStorage');9const testModifier = new TestModifier();10const fixtures = new TestFixtures();11const snapshotManager = new TestSnapshotManager({12  snapshotter: new TestSnapshotter(),13  storage: new TestSnapshotStorage(),14});15const test = new Test('test', testModifier, fixtures, snapshotManager);16const tests = [test];17const type = TestType.Fixture;18const specs = flattenSpecs(tests, type);19console.log(specs);

Using AI Code Generation

1const { flattenSpecs } = require('@playwright/test/lib/runner');2const { test } = require('@playwright/test');3const { expect } = require('@playwright/test');4const fs = require('fs');5const path = require('path');6];7const spec = flattenSpecs(specs);8let content = '';9content += 'const { test, expect } = require("@playwright/test");\n\n';10content += 'test.describe("Playwright Test", () => {\n';11spec.forEach((s) => {12  content += `test("${s.title}", async ({ page }) => {\n`;13  content += s.fn.toString();14  content += '});\n';15});16content += '});\n';17fs.writeFileSync(path.join(__dirname, 'test.js'), content);

Using AI Code Generation

1const { flattenSpecs } = require('@playwright/test/lib/test');2const { test } = require('@playwright/test');3const { expect } = require('@playwright/test');4const { flattenSpecs } = require('@playwright/test/lib/test');5const { test } = require('@playwright/test');6const { expect } = require('@playwright/test');7const { flattenSpecs } = require('@playwright/test/lib/test');8const { test } = require('@playwright/test');9const { expect } = require('@playwright/test');10const { flattenSpecs } = require('@playwright/test/lib/test');11const { test } = require('@playwright/test');12const { expect } = require('@playwright/test');13const { flattenSpecs } = require('@playwright/test/lib/test');14const { test } = require('@playwright/test');15const { expect } = require('@playwright/test');16const { flattenSpecs } = require('@playwright/test/lib/test');17const { test } = require('@playwright/test');18const { expect } = require('@playwright/test');19const { flattenSpecs } = require('@playwright/test/lib/test');20const { test } = require('@playwright/test');21const { expect } = require('@playwright/test');22const { flattenSpecs } = require('@playwright/test/lib/test');23const { test } = require('@playwright/test');24const { expect } = require('@playwright/test');25const { flattenSpecs } = require('@playwright/test/lib/test');26const { test } = require('@playwright/test');27const { expect } = require('@playwright/test');28const { flattenSpecs } = require('@playwright/test/lib/test');29const { test } = require('@playwright/test');30const { expect } = require('@playwright/test');

Using AI Code Generation

1const { flattenSpecs } = require('@playwright/test/lib/test/workerRunner');2const { test } = require('@playwright/test');3test.describe('test', () => {4  test('test', async ({ page }) => {5    console.log(flattenSpecs(test.spec));6  });7});

Using AI Code Generation

1const { Playwright } = require('@playwright/test');2const { flattenSpecs } = Playwright.internal;3const { test } = require('@playwright/test');4test.describe('Suite 1', () => {5  test('test 1', async ({ page }) => {6  });7  test('test 2', async ({ page }) => {8  });9});10test.describe('Suite 2', () => {11  test('test 3', async ({ page }) => {12  });13});14const specs = flattenSpecs(test._entries);15console.log(specs);16  {17      {18      },19      {20      }21  },22  {23      {24      }25  }

Using AI Code Generation

1const { Playwright } = require('@playwright/test');2const { flattenSpecs } = Playwright._internal.api;3const { test } = require('@playwright/test');4test('test', async ({ page }) => {5  const specs = await flattenSpecs([6    {7        {8          fn: async ({ page }) => {9          },10        },11    },12  ]);13  console.log(specs);14});15#### `constructor(options)`

Using AI Code Generation

1const { flattenSpecs } = require('playwright/lib/test/runner');2const path = require('path');3const { test } = require('playwright');4  path.join(__dirname, 'spec1.spec.js'),5  path.join(__dirname, 'spec2.spec.js'),6];7async function main() {8  const { suites } = await flattenSpecs(specs);9  for (const suite of suites) {10    for (const test of suite.tests) {11      console.log(test.title);12    }13  }14}15main();

Using AI Code Generation

1const { devices } = require('playwright');2const { flattenSpecs } = require('playwright/lib/server/deviceDescriptors');3const devicesList = flattenSpecs(devices);4console.log(devicesList);5  {6      'Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Mobile/15E148 Safari/604.1',7    viewport: { width: 414, height: 896, deviceScaleFactor: 3, isMobile: true, hasTouch: true, isLandscape: false },8    userAgentMetadata: { platform: 'iPhone', platformVersion: '14.0', architecture: '', model: 'iPhone', mobile: true },9  },10  {11      'Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Mobile/15E148 Safari/604.1',12    viewport: { width: 375, height: 812, deviceScaleFactor: 3, isMobile: true, hasTouch: true, isLandscape: false },13    userAgentMetadata: { platform: 'iPhone', platformVersion: '14.0', architecture: '', model: 'iPhone', mobile: true },14  },15  {16      'Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Mobile/15E148 Safari/604.1',17    viewport: { width: 414, height: 896, deviceScaleFactor: 3, isMobile: true, hasTouch: true, isLandscape: false },18    userAgentMetadata: { platform: 'iPhone', platformVersion: '14.0', architecture: '', model: 'iPhone', mobile: true },19  },20  {21      'Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X)

Using AI Code Generation

1const { flattenSpecs } = require('playwright/lib/test/test');2const { test } = require('@playwright/test');3const path = require('path');4const fixtures = test.describe('', () => {5  test.beforeEach(async ({ page }) => {6  });7  test('should have correct title', async ({ page }) => {8    expect(await page.title()).toBe('Playwright');9  });10  test('should have correct text', async ({ page }) => {11    const text = await page.innerText('.navbar__inner');12    expect(text).toContain('API');13    expect(text).toContain('Docs');14  });15});16const flattenSpecsResult = flattenSpecs(fixtures, path.join(__dirname, 'test.js'));17console.log(flattenSpecsResult);

StackOverFlow community discussions

Questions

Discussion

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

Running Playwright in Azure Function

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

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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