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April 16, 2023 01:09 pm GMT
Original Link: https://dev.to/zt4ff_1/playwright-tutorial-for-beginners-9-assertions-2g5c
Playwright Tutorial for Beginners 9 - Assertions
Playwright Assertions
Playwright make use of expect library (provided by Jest) for assertions. The library provides different types of matchers like toEqual, toContain, toMatch, toMatchSnapshots and many more.
To make use of the library, import it into your test script.
const { expect } = require('@playwright/test')You can extend with async matchers that will wait until the specified assertion condition is met.
expect(value).toEqual(anotherValue);await expect(value).toBeTruthy();Common patterns
// assert text contentexpect(await page.locator('.welcomeMsg').textContent()).toEqual('Welcome pal');// assert inner textexpect(await page.locator('.goodbyeMsg').innerText()).toBe('Goodbye pal');// assert inner htmlexpect(await page.locator('.button-container').innerText()).toEqual( '<button>Submit</button>' );// assert attributeexpect(await page.locator('css=#name-input')).toHaveAttribute('type', 'text');// assert urlexpect(await page.url()).toMatch(/\/users\/test/);// and many more!Custom assertions
To have custom assertions, you can extend the expect provided by Jest. For instance, we will create a custom matcher called toBeBetween10And100:
const { expect, default: test } = require('@playwright/test');expect.extend({ toBeBetween10And100(num) { const pass = num > 10 && num < 100; if (pass) { return { message: () => `expected ${num} to be not within 10 and 100`, pass: true }; } return { message: () => `expected ${num} to be within 10 and 100`, pass: false }; }});test('simple test', async () => { // pass expect(25).toBeBetween10And100();});There are a bunch of matchers you can use with Playwright depending on what your test suites are.
Original Link: https://dev.to/zt4ff_1/playwright-tutorial-for-beginners-9-assertions-2g5c
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