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How to use filePayloadToJson method in Playwright Internal

Best JavaScript code snippet using playwright-internal

fetch.js

...115            const payload = value;116            if (!Buffer.isBuffer(payload.buffer)) throw new Error(`Unexpected buffer type of 'data.${name}'`);117            multipartData.push({118              name,119              file: filePayloadToJson(payload)120            });121          } else if (value instanceof _fs.default.ReadStream) {122            multipartData.push({123              name,124              file: await readStreamToJson(value)125            });126          } else {127            multipartData.push({128              name,129              value: String(value)130            });131          }132        }133      }134      if (postDataBuffer === undefined && jsonData === undefined && formData === undefined && multipartData === undefined) postDataBuffer = (request === null || request === void 0 ? void 0 : request.postDataBuffer()) || undefined;135      const postData = postDataBuffer ? postDataBuffer.toString('base64') : undefined;136      const result = await this._channel.fetch({137        url,138        params,139        method,140        headers,141        postData,142        jsonData,143        formData,144        multipartData,145        timeout: options.timeout,146        failOnStatusCode: options.failOnStatusCode,147        ignoreHTTPSErrors: options.ignoreHTTPSErrors148      });149      return new APIResponse(this, result.response);150    });151  }152  async storageState(options = {}) {153    const state = await this._channel.storageState();154    if (options.path) {155      await (0, _utils.mkdirIfNeeded)(options.path);156      await _fs.default.promises.writeFile(options.path, JSON.stringify(state, undefined, 2), 'utf8');157    }158    return state;159  }160}161exports.APIRequestContext = APIRequestContext;162_util$inspect$custom = util.inspect.custom;163class APIResponse {164  constructor(context, initializer) {165    this._initializer = void 0;166    this._headers = void 0;167    this._request = void 0;168    this._request = context;169    this._initializer = initializer;170    this._headers = new network.RawHeaders(this._initializer.headers);171  }172  ok() {173    return this._initializer.status >= 200 && this._initializer.status <= 299;174  }175  url() {176    return this._initializer.url;177  }178  status() {179    return this._initializer.status;180  }181  statusText() {182    return this._initializer.statusText;183  }184  headers() {185    return this._headers.headers();186  }187  headersArray() {188    return this._headers.headersArray();189  }190  async body() {191    try {192      const result = await this._request._channel.fetchResponseBody({193        fetchUid: this._fetchUid()194      });195      if (result.binary === undefined) throw new Error('Response has been disposed');196      return Buffer.from(result.binary, 'base64');197    } catch (e) {198      if (e.message.includes(_errors.kBrowserOrContextClosedError)) throw new Error('Response has been disposed');199      throw e;200    }201  }202  async text() {203    const content = await this.body();204    return content.toString('utf8');205  }206  async json() {207    const content = await this.text();208    return JSON.parse(content);209  }210  async dispose() {211    await this._request._channel.disposeAPIResponse({212      fetchUid: this._fetchUid()213    });214  }215  [_util$inspect$custom]() {216    const headers = this.headersArray().map(({217      name,218      value219    }) => `  ${name}: ${value}`);220    return `APIResponse: ${this.status()} ${this.statusText()}\n${headers.join('\n')}`;221  }222  _fetchUid() {223    return this._initializer.fetchUid;224  }225  async _fetchLog() {226    const {227      log228    } = await this._request._channel.fetchLog({229      fetchUid: this._fetchUid()230    });231    return log;232  }233}234exports.APIResponse = APIResponse;235function filePayloadToJson(payload) {236  return {237    name: payload.name,238    mimeType: payload.mimeType,239    buffer: payload.buffer.toString('base64')240  };241}242async function readStreamToJson(stream) {243  const buffer = await new Promise((resolve, reject) => {244    const chunks = [];245    stream.on('data', chunk => chunks.push(chunk));246    stream.on('end', () => resolve(Buffer.concat(chunks)));247    stream.on('error', err => reject(err));248  });249  const streamPath = Buffer.isBuffer(stream.path) ? stream.path.toString('utf8') : stream.path;...

Using AI Code Generation

1const { filePayloadToJson } = require('playwright/lib/utils/utils');2const filePayload = await page.$eval('#file-input', e => e.files[0]);3const json = await filePayloadToJson(filePayload);4console.log(json);5const { filePayloadToJson } = require('playwright/lib/utils/utils');6const filePayload = await page.$eval('#file-input', e => e.files[0]);7const json = await filePayloadToJson(filePayload);8console.log(json);

Using AI Code Generation

1const { filePayloadToJson } = require('@playwright/test/lib/utils/utils');2const fs = require('fs');3const path = require('path');4const file = fs.readFileSync(path.resolve(__dirname, 'test.json'));5const json = filePayloadToJson(file);6console.log(json);7{ "a": "b" }

Using AI Code Generation

1const { filePayloadToJson } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const filePayload = { name: 'test.txt', mimeType: 'text/plain', buffer: 'SGVsbG8sIFdvcmxkIQ==' };3const filePayloadJson = filePayloadToJson(filePayload);4console.log(filePayloadJson);5{6}7const filePayloadJson = {8};9const file = new File([filePayloadJson.buffer], filePayloadJson.name, { type: filePayloadJson.mimeType });10await page.setInputFiles('input[type="file"]', file);

Using AI Code Generation

1const { filePayloadToJson } = require('@playwright/test');2const filePayload = {3  buffer: Buffer.from('Hello World'),4};5const json = filePayloadToJson(filePayload);6console.log(json);7import { jsonToFilePayload } from '@playwright/test';8const json = JSON.stringify({9  buffer: Buffer.from('Hello World').toString('base64'),10});11const filePayload = jsonToFilePayload(json);12console.log(filePayload);

Using AI Code Generation

1const { filePayloadToJson } = require('@playwright/test/lib/server/trace/common/traceModel');2const { readFile } = require('fs').promises;3const { join } = require('path');4const { chromium } = require('playwright');5(async () => {6  const browser = await chromium.launch();7  const context = await browser.newContext();8  const page = await context.newPage();9  const trace = await page.tracing.start({ screenshots: true, snapshots: true });10  await page.tracing.stop({ path: 'trace.zip' });11  await browser.close();12  const json = await filePayloadToJson(await readFile(join(__dirname, 'trace.zip')));13  console.log(json);14})();15{ version: 3,16   { 'playwright_version': '1.12.3',

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?

firefox browser does not start in playwright

Running Playwright in Azure Function

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

firefox browser does not start 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

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

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

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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