Playwright Testing Interview Questions for Managers (₹30–40 LPA)

Use expect(page).toHaveScreenshot() to compare with stored baselines, with thresholds and masks for dynamic regions.

The object behind the request fixture that holds base URL, headers and cookies, and can share cookies with a browser context.

waitForSelector is a lower-level wait; locator assertions are preferred as they retry and are more readable.

undefined means a variable has not been assigned; null is an intentional empty value.

A browser is the engine instance; a context is an isolated session (cookies, storage); a page is a tab inside a context.

Both describe object shapes. Interfaces can be extended and merged; type aliases can also describe unions and primitives. Use interfaces for page or test-data shapes, types for unions.

Assert the status with expect(res.status()).toBe(200), parse res.json() and check fields, using schema validation for the structure.

Use page.waitForResponse(res => res.url().includes('/api/orders') && res.ok()) together with the action that triggers it.

const [newPage] = await Promise.all([ context.waitForEvent('page'), page.getByText('Open').click(), ]); await newPage.waitForLoadState();

TypeScript + POM + custom fixtures, environment configs, API helpers for test data, tags like @smoke, sharding across CI machines, retries with traces, HTML/Allure reports, lint and review rules.

Send invalid payloads or missing auth and assert 400, 401 or 404 codes and the error message bodies.

test('login', async ({ page }) => { await page.goto('/login'); await page.getByLabel('Email').fill('a@b.com'); await page.getByLabel('Password').fill('secret'); await page.getByRole('button', { name: 'Login' }).click(); await expect(page.getByRole('heading', { name: 'Dashboard' })).toBeVisible(); });

Use request.post with multipart: { file: { name, mimeType, buffer } } and assert the response and stored file details.

Wait for the popup event with const [popup] = await Promise.all([page.waitForEvent('popup'), page.click('a')]), then interact with popup.

test.step groups actions into named steps in reports; annotations such as test.skip, test.fixme and test.slow communicate intent and adjust behaviour.

Before acting, Playwright waits for the element to be attached, visible, stable, enabled and able to receive events — so manual waits are rarely needed.

Click to open the control, then use getByRole('option') or a text locator for the target item, instead of relying on fragile index-based selectors.

A short function syntax that does not have its own this and arguments, taking them from the surrounding scope.

Playwright locators pierce open shadow roots by default, so getByRole and CSS locators work without special handling.

Use device descriptors such as devices['iPhone 13'] in a project config to emulate viewport, user agent and touch.

It records screenshots, DOM snapshots, network calls and actions per step so you can replay a failed run and see exactly what happened.

Use timeout and expect.timeout in config, test.setTimeout() for one test and test.slow() for known slower tests.

Assertions like expect(locator).toBeVisible() that retry until they pass or time out, unlike one-off checks.

Destructuring pulls values from arrays or objects into variables; spread expands an array or object into another, useful for copying and merging config.

List, dot, line, HTML, JSON and JUnit reporters, plus integrations such as Allure, configurable per environment.

Run in parallel with sharding, reuse authentication state, set up data through APIs, avoid unnecessary waits, run smoke on every commit and the full suite nightly.

A Locator is lazy, re-resolved on every action and auto-waits (recommended). An ElementHandle points to one DOM node and can go stale.

Fetch tokens in a fixture with expiry tracking and refresh it when it is about to expire, keeping tests unaware of the details.

Auto-waiting, a built-in test runner, Chromium/Firefox/WebKit with one API, network interception, the trace viewer and parallel runs out of the box — usually faster and less flaky.

Add retries with backoff for the API step, set a suitable timeout, and use mocks for non-critical dependencies.

A class receives page in its constructor, stores locators as properties and exposes actions like login(user, pass). Tests call page objects, not raw locators.

Create a class that takes a page, defines locators as properties and exposes action methods; instantiate it in a fixture for clean tests.

Capture the download event, save it with download.saveAs, then read the file in Node and assert on name, size or content.

Log in once in a setup project, save storageState to a file and reuse it in other projects or tests.

Syntax over Promises: an async function returns a Promise and await pauses until it resolves. Every Playwright action returns a Promise, so you await each step.

POST the query and variables as JSON to the single endpoint and assert both data and errors fields in the response.

npx playwright test tests/login.spec.ts, add -g "test title" to match a name, or use test.only while debugging.

await expect(page).toHaveScreenshot('home.png') compares against a baseline image; tune maxDiffPixels and mask dynamic areas like dates.

In a fixture or beforeEach, call the API (request.post) to create the user or order, use it in the UI test, then delete it in teardown. It is faster and more reliable than creating data through the UI.

Workflow: checkout → setup-node → npm ci → npx playwright install --with-deps → npx playwright test → upload playwright-report as an artifact.

Rely on auto-waiting plus a web-first assertion on the final state, disable animations in config for tests and avoid fixed timeouts.

Add tags in the title (@smoke) or use the tag option, and run with --grep @smoke or --grep-invert.

Use a library such as zod or ajv to define the expected schema and parse the response to fail on missing or wrongly typed fields.

Reusable setup/teardown units injected into tests (page, context, request). You can extend test with custom fixtures such as loggedInPage.

Scripts that run once before or after the whole run, for seeding data, starting services or creating authentication state.

Use page.frameLocator('#frame').getByRole(...) so actions work inside the iframe with auto-waiting.

The action runs without waiting, so the next step may run first — causing flaky failures or 'Target closed' errors. The @typescript-eslint/no-floating-promises rule catches it.

page.screenshot() for captures and config options use: { screenshot: 'only-on-failure', video: 'retain-on-failure' } for automatic evidence.

Define projects for chromium, firefox and webkit in playwright.config.ts, set workers, then run: npx playwright test

TypeScript adds static types on top of JavaScript and compiles to it. Types catch errors early and give better autocomplete, which helps in larger test suites.

Fixtures set up and tear down test dependencies. Extend with test.extend({ loggedInPage: async ({ page }, use) => { ...; await use(page); } }).