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How to use setRequestInterceptor method in Playwright Internal

Best JavaScript code snippet using playwright-internal

api.service.js

Source:api.service.js

...6const ApiService = {7    init() {8        Vue.use(VueAxios, axios);9        Vue.axios.defaults.baseURL = process.env.VUE_APP_BASE_URL;10        this.setRequestInterceptor();11        this.setResponseInterceptor();12    },13    setRequestInterceptor() {14        Vue.axios.interceptors.request.use(15            config => {16                const accessToken = JwtService.getAccessToken();17                if (accessToken) {18                    config.headers.Authorization = "Bearer " + accessToken;19                }20                return config;21            },22            error => {23                Promise.reject(error).then(error => console.log(error));24                JwtService.destroyAccessToken()25                JwtService.destroyRefreshToken()26            }27        );...

recorder.js

Source:recorder.js

...63    fs.appendFileSync(config.fixtureFilePath, JSON.stringify(reducedOutput));64  };65  if (config.page) {66    setResponseInterceptor(config.page);67    if (config.replaceImage) setRequestInterceptor(config.page);68    config.page.on('close', () => {69      if (!fixtureSaved) { saveScopes(); }70    });71  } else {72    const pages = await getBrowserPages(browser);73    pages.forEach(p => setResponseInterceptor(p));74    if (config.replaceImage) pages.forEach(p => setRequestInterceptor(p));75  }76  browser.on('disconnected', () => {77    if (!fixtureSaved) { saveScopes(); }78  });79};...

player.js

Source:player.js

...45        : request.abort();46    });47  };48  if (config.page) {49    await setRequestInterceptor(config.page);50  } else {51    const pagePromiseArray = [];52    const pages = await getBrowserPages(browser);53    pages.forEach(p => pagePromiseArray.push(setRequestInterceptor(p)));54    await Promise.all(pagePromiseArray);55  }56};...

App.js

Source:App.js

...14  const [authToken, setAuthToken] = useState(getUserToken());15  const [currentUser, setCurrentUser] = useState(getUser());16  const routing = useRoutes(routes(currentUser));17  const updateInterceptors = () => {18    const requestInterceptor = setRequestInterceptor(() => {19      setIsLoading(true);20    });21    const responseInterceptor = setResponseInterceptor(data => {22      setIsLoading(false);23      return data;24    }, error => {25      setIsLoading(false);26      if (error.response && error.response.status === 401) {27        if (location.pathname.split('/').pop() !== 'login') {28          navigate('/login');29        }30      }31      return Promise.reject(error)32    });...

Network.js

Source:Network.js

2import axios from 'axios'3import type {NetworkSchema} from './NetworkSchema'4export interface NetworkInterface {5    makeRequest(requestSchema: NetworkSchema): Promise<any>,6    setRequestInterceptor(interceptor: Function, errorInterceptor?: Function): void,7    setResponseInterceptor(interceptor: Function, errorInterceptor?: Function): void,8    ejectRequestInterceptor(): void,9    ejectResponseInterceptor(): void10}11class Network implements NetworkInterface {12    httpClient: Object13    requestInterceptor: Function14    responseInterceptor: Function15    static methods = {16        GET: 'GET',17        POST: 'POST',18        PUT: 'PUT',19        DELETE: 'DELETE'20    }21    constructor(baseURL: string, options: Object = {}) {22        this.httpClient = axios.create({baseURL, ...options})23    }24    setRequestInterceptor(interceptor: Function, errorInterceptor?: Function) {25        this.requestInterceptor = this.httpClient.interceptors.request.use(interceptor, errorInterceptor)26    }27    setResponseInterceptor(interceptor: Function, errorInterceptor?: Function) {28        this.responseInterceptor = this.httpClient.interceptors.response.use(interceptor, errorInterceptor)29    }30    ejectRequestInterceptor() {31        this.httpClient.request.eject(this.requestInterceptor)32    }33    ejectResponseInterceptor() {34        this.httpClient.request.eject(this.responseInterceptor)35    }36    makeRequest(requestSchema: NetworkSchema): Promise<any> {37        return this.httpClient.request(requestSchema)38    }...

axios.js

Source:axios.js

...28        }29    );30}31export const setInterceptors = ctx => {32    setRequestInterceptor(ctx);33    setResponseInterceptor(ctx);...

request-interceptor.js

Source:request-interceptor.js

...4});5exports.setRequestInterceptor = setRequestInterceptor;6var _axios = _interopRequireDefault(require("axios"));7function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }8function setRequestInterceptor() {9  _axios["default"].interceptors.request.use(function (config) {10    var sessionId = sessionStorage.getItem('session_id');11    var token = localStorage.getItem('token');12    var refresh_token = localStorage.getItem('refresh_token');13    config.headers['session_id'] = sessionId;14    config.headers['Access-Control-Allow-Origin'] = '*';15    config.headers['Content-Type'] = 'application/json';16    if (token) {17      config.headers['Authorization'] = 'Bearer ' + token;18      config.headers['refresh_token'] = refresh_token;19    }20    return config;21  }, function (error) {22    Promise.reject(error);...

request.js

Source:request.js

1import axios from 'axios'2import { setRequestInterceptor } from './request-interceptor'3import { setError, setLoader } from '../actions/common'4const base_url = 'http://localhost:8080/open-banking/v3'5setRequestInterceptor()6export default function createRequest(7    dispatch,8    endpoint,9    method = 'GET',10    data = {},11    headers = {},12    callbackFn13) {14    dispatch(setLoader(true))15    axios({16        url: base_url + endpoint,17        method,18        data: data,19        headers,...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  await context.setRequestInterception(true);6  context.on('request', request => {7    if (request.url().endsWith('.css'))8      request.abort();9      request.continue();10  });11  const page = await context.newPage();12  await page.screenshot({ path: 'wikipedia.png' });13  await browser.close();14})();15import { chromium } from 'playwright';16(async () => {17  const browser = await chromium.launch();18  const context = await browser.newContext();19  await context.setRequestInterception(true);20  context.on('request', request => {21    if (request.url().endsWith('.css'))22      request.abort();23      request.continue();24  });25  const page = await context.newPage();26  await page.screenshot({ path: 'wikipedia.png' });27  await browser.close();28})();29from playwright.sync_api import sync_playwright30with sync_playwright() as p:31    browser = p.chromium.launch()32    context = browser.newContext()33    context.setRequestInterception(True)34    context.on('request', lambda request: request.abort() if request.url.endswith('.css') else request.continue())35    page = context.newPage()36    page.screenshot(path='wikipedia.png')37    browser.close()38import com.microsoft.playwright.*;39public class Test {40  public static void main(String[] args) {41    try (Playwright playwright = Playwright.create()) {42      BrowserType chromium = playwright.chromium();43      Browser browser = chromium.launch();44      BrowserContext context = browser.newContext();45      context.setRequestInterception(true);46      context.on("request", request -> {47        if (request.url().endsWith(".css")) {48          request.abort();49        } else {50          request.continue();51        }52      });53      Page page = context.newPage();54      page.screenshot(new Page.ScreenshotOptions().setPath("wikipedia.png"));55      browser.close();56    }57  }58}59using Microsoft.Playwright;60{

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext({5    recordVideo: {6    },7  });8  const page = await context.newPage();9  await page.setRequestInterception(true);10  page.on('request', request => {11    if (request.url().endsWith('.png') || request.url().endsWith('.jpg'))12      request.abort();13      request.continue();14  });15  await page.screenshot({ path: 'example.png' });16  await browser.close();17})();18const { chromium } = require('playwright');19const { setRequestInterceptor } = require('playwright-external');20(async () => {21  const browser = await chromium.launch();22  const context = await browser.newContext({23    recordVideo: {24    },25  });26  const page = await context.newPage();27  setRequestInterceptor(page, request => {28    if (request.url().endsWith('.png') || request.url().endsWith('.jpg'))29      request.abort();30      request.continue();31  });32  await page.screenshot({ path: 'example.png' });33  await browser.close();34})();35const { chromium } = require('playwright');36const { setRequestInterceptor } = require('playwright-external');37(async () => {38  const browser = await chromium.launch();39  const context = await browser.newContext({40    recordVideo: {41    },42  });43  const page = await context.newPage();44  setRequestInterceptor(page, request => {45    if (request.url().endsWith('.png') || request.url().endsWith('.jpg'))46      request.abort();47      request.continue();48  });49  await page.screenshot({ path: 'example.png' });50  await browser.close();51})();52const { chromium } = require('playwright');53const { setRequestInterceptor } = require

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.setRequestInterceptor(async (req) => {6    console.log(req.url());7    await req.continue();8  });9  await browser.close();10})();

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  await context.setRequestInterceptor((route) => {6    const url = route.request().url();7    if (url.endsWith('.png') || url.endsWith('.jpg'))8      route.abort();9      route.continue();10  });11  const page = await context.newPage();12  await page.screenshot({path: 'wikipedia-homepage.png'});13  await browser.close();14})();15const {chromium} = require('playwright');16(async () => {17  const browser = await chromium.launch();18  const context = await browser.newContext();19  await context.setRequestInterceptor((route) => {20    const url = route.request().url();21    if (url.endsWith('.png') || url.endsWith('.jpg'))22      route.abort();23      route.continue();24  });25  const page = await context.newPage();26  await page.screenshot({path: 'wikipedia-homepage.png'});27  await browser.close();28})();

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  await context.setRequestInterception(true);6  context.on('request', request => {7    request.continue({8      headers: {9        ...request.headers(),10      },11    });12  });13  const page = await context.newPage();14  await page.screenshot({ path: 'example.png' });15  await browser.close();16})();17const {chromium} = require('playwright');18(async () => {19  const browser = await chromium.launch();20  const context = await browser.newContext();21  const page = await context.newPage();22  await page.setExtraHTTPHeaders({23  });24  await page.screenshot({ path: 'example.png' });25  await browser.close();26})();27const {chromium} = require('playwright');28(async () => {29  const browser = await chromium.launch();30  const context = await browser.newContext({31    extraHTTPHeaders: {32    },33  });34  const page = await context.newPage();35  await page.screenshot({ path: 'example.png' });36  await browser.close();37})();38const {chromium} = require('playwright');39(async () => {40  const browser = await chromium.launch({41    extraHTTPHeaders: {42    },43  });44  const context = await browser.newContext();

Using AI Code Generation

1const {webkit} = require('playwright-internal');2let browser = await webkit.launch();3let context = await browser.newContext();4let page = await context.newPage();5await page.setRequestInterceptor(request => {6    if (request.url().endsWith('.png'))7        request.abort();8        request.continue();9});10const {webkit} = require('playwright-internal');11let browser = await webkit.launch();12let context = await browser.newContext();13let page = await context.newPage();14await page.setRequestInterceptor(request => {15    if (request.url().endsWith('.png'))16        request.abort();17        request.continue();18});19const {webkit} = require('playwright-internal');20let browser = await webkit.launch();21let context = await browser.newContext();22let page = await context.newPage();23await page.setRequestInterceptor(request => {24    if (request.url().endsWith('.png'))25        request.abort();26        request.continue();27});28const {webkit} = require('playwright-internal');29let browser = await webkit.launch();30let context = await browser.newContext();31let page = await context.newPage();32await page.setRequestInterceptor(request => {33    if (request.url().endsWith('.png'))34        request.abort();35        request.continue();36});37const {webkit} = require('playwright-internal');38let browser = await webkit.launch();39let context = await browser.newContext();40let page = await context.newPage();41await page.setRequestInterceptor(request => {42    if (request.url().endsWith('.png'))43        request.abort();44        request.continue();45});

Using AI Code Generation

1const { setRequestInterceptor } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await setRequestInterceptor(page, (route, request) => {7    console.log(request.url());8    route.continue();9  });10  await browser.close();11})();12const { setRequestInterceptor } = require('playwright/lib/server/supplements/recorder/recorderSupplement');13const { chromium } = require('playwright');14(async () => {15  const browser = await chromium.launch();16  const page = await browser.newPage();17  await setRequestInterceptor(page, (route, request) => {18    console.log(request.url());19    route.continue();20  });21  await browser.close();22})();23const { setRequestInterceptor } = require('playwright/lib/server/supplements/recorder/recorderSupplement');24const { chromium } = require('playwright');25(async () => {26  const browser = await chromium.launch();27  const page = await browser.newPage();28  await setRequestInterceptor(page, (route, request) => {29    console.log(request.url());30    route.continue();31  });32  await browser.close();33})();34const { setRequestInterceptor } = require('playwright/lib/server/supplements/recorder/recorderSupplement');35const { chromium } = require('playwright');36(async () => {37  const browser = await chromium.launch();38  const page = await browser.newPage();39  await setRequestInterceptor(page, (route, request) => {40    console.log(request.url());41    route.continue();42  });43  await browser.close();44})();

StackOverFlow community discussions

Questions

Discussion

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

Running Playwright in Azure Function

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

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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