Playwright Testing Interview Questions for Senior Specialists (₹15–20 LPA)

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

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.

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

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.

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.

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

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.

npm is the Node package manager. package.json lists the project's dependencies and scripts, such as the command that runs the tests.

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

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

Tag tests (in the title or with { tag: '@smoke' }) and run: npx playwright test --grep @smoke (use --grep-invert to exclude).

obj?.a?.b safely reads nested properties and returns undefined instead of throwing if something in the chain is missing.

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 expect.soft(locator).toHaveText('...') records the failure but lets the test continue, so you see every mismatch in one run.

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.

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.

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

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

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

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.

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

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

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

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.

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

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

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

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

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

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

Use dotenv files per environment, read them in playwright.config and set baseURL and credentials from variables, selecting with an ENV flag.

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

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

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

User-facing ones: getByRole, getByText, getByLabel, getByPlaceholder and getByTestId, which are more resilient than CSS or XPath.

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

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.

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(); });

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

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

API testing checks services directly and is fast and stable; UI testing checks the full user experience in the browser and is slower.

Install the allure-playwright reporter, add it in the config reporters array and generate the report from the allure-results folder in CI.

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

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.

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

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

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.

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

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

Turn on trace: 'on-first-retry', open the trace viewer, check network and timing, replace hard waits with web-first assertions, isolate test data and check for sharding conflicts.

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

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

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

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

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

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

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

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.

const [download] = await Promise.all([ page.waitForEvent('download'), page.getByText('Export').click(), ]); await download.saveAs('reports/file.csv');