Atlassian Playwright Testing Interview Questions & Answers

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.

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.

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

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

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

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.

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(); });

Log in with request.post, call request.storageState(), and create a browser context using that state.

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

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

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

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

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

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

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

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

Synchronous code runs line by line and blocks; asynchronous code starts a task and continues, handling the result later with promises or await.

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.

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

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.

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

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

Use --debug or the Inspector, page.pause(), UI mode, the trace viewer and headed runs with slowMo.

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.

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.

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

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

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

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.

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

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

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

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.

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.

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

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

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

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

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

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

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.

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

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.

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

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

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

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

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

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

JavaScript runs one call stack and uses queues for async work; the event loop pushes callbacks from the microtask (promises) and task queues when the stack is empty.

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