Meesho Playwright Testing Interview Questions & Answers

Use try-catch with await, or .catch() on promises, and make sure rejected promises are never left unhandled.

npx playwright codegen records user actions and generates test code with suggested locators, handy for starting tests.

Both describe the shape of data. Interfaces are extendable and suit object contracts; type aliases can also model unions and primitives.

await request.post('/api/users', { data: { name: 'Asha' } }) automatically sets JSON headers and serialises the payload.

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

Set retries in the config or CLI and failed tests re-run in a fresh context, with trace recorded on first retry to diagnose flakiness.

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

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

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

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

Separate tests, page objects, fixtures, utilities, test data and config; use tags, projects, shared auth setup, linting, code review and a CI pipeline with sharding and reports.

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

Placeholders for types that make reusable code type-safe, for example a helper function returning the same type of item that it receives.

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

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

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.

locator.hover() and locator.dragTo(target) perform these actions, with auto-waiting for actionability.

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.

Log in once in global setup, save storageState to a JSON file and set use.storageState in the config so every test starts logged in.

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.

A function that remembers variables from its outer scope even after that scope has finished. They are used for private state and factory helpers.

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

Use the request fixture: const res = await request.get('/api/users'); expect(res.ok()).toBeTruthy(); const body = await res.json();

Create test data through API calls, verify it in the UI and clean up via API, which makes UI tests faster and more reliable.

click simulates a real user click with actionability checks; dispatchEvent fires a DOM event directly without those checks.

Read the next page link or IDs from earlier responses, loop until done and assert counts and uniqueness; pass IDs between calls in the same test.

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

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.

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.

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

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.

Set them in the context options (geolocation, permissions, timezoneId, locale) to simulate users from other regions.

beforeEach runs the same code before every test in scope; fixtures are lazy, composable and only set up what a test uses.

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

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.

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

Register page.on('dialog', d => d.accept()) before the action triggers the dialog.

Use environment variables or .env files, a baseURL in config, API calls for setup and cleanup, and unique data per run.

var is function-scoped and hoisted. let and const are block-scoped; const can't be reassigned (though an object it points to can change). Prefer const, then let.

Integrate axe-core through @axe-core/playwright, run an analysis on the page and assert that there are no violations.

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

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

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 page.route to intercept the call and fulfil it with fixed JSON so tests do not depend on external systems.

Use npx playwright test --shard=1/4 in each CI job and merge reports afterwards to reduce total run time.

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

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

all waits for every promise and rejects on the first failure; allSettled waits for all and reports each outcome; race settles with the first one to finish.

An open-source end-to-end testing framework from Microsoft that automates Chromium, Firefox and WebKit through one API, in multiple languages.

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.

await page.route('**/api/users', route => route.fulfill({ status: 200, json: [{ id: 1, name: 'Test' }] }) );

A type alias describes a shape or union of values; an enum creates a named set of constants that exists at runtime.

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

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

Strings in backticks that allow embedded expressions like `Hello ${name}` and multi-line text, useful for building dynamic locators and URLs.

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.

string, number, boolean, null, undefined, symbol, bigint and object (including arrays and functions).

Playwright supports multiple browsers, tabs, languages and has auto-waiting and tracing; Selenium has the widest ecosystem; Cypress runs in-browser with a great UI but has more limits across tabs.

Functions that take other functions as arguments or return them, such as map, filter and reduce, or a helper that wraps retry logic around a test step.

page.route('**/api/items', route => route.fulfill({ json: [...] })) intercepts and replies with test data; route.abort() simulates failures.

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.

Cover happy path, validation errors, auth and permissions, boundary values, idempotency, schema, performance and data cleanup.

Use the official Playwright image which contains browsers and dependencies, mount the project and run npx playwright test for consistent CI environments.

An object describing how to find an element, re-evaluated on every action so it always targets the current DOM.

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

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

Declarations of var and functions are moved to the top of their scope at compile time; let and const are hoisted but stay in the temporal dead zone until declared.

Run npm init playwright@latest, which sets up config, example tests and browsers; execute with npx playwright test.

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

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

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

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.

Set extraHTTPHeaders in the config or pass headers per request, for example Authorization: Bearer token fetched in a setup step.

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

setInputFiles on the input for uploads; for downloads wait on page.waitForEvent('download') and save or inspect the file.

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

Named configurations that run the same tests across different browsers, devices or environments.

Record timestamps around the request or use response timing, then assert the duration is under an agreed threshold.