Possible to do slowMo for just a single test?
The test code below only passes when I do slowMo=1000 in headless. I know I am not supposed to use slowMo, but I am going by all the recommendations by playwright and it still only passes with slowMo. Is there a way to do just slowMo for a single test so I do not have to slow down the whole test suite?
Note: I am using mock data, not live data, so there is no lag in that respect.
it('should update max value in input box from slide adjustment and save', async({ page }) => {
const responsePromise = page.waitForResponse(apiUrl);
const targetPosition = { x: 100, y: 10 };
const el = page.getByText('Match is probable');
const el0 = page.locator('#mat-input-1');
await page.getByRole('slider').nth(1).dragTo(el, {targetPosition});
await expect(el0).toHaveAttribute('ng-reflect-model', '75');
const response = await responsePromise;
expect(response.url()).toContain('3924');
});This thread is trying to answer question "Is there a way to apply slowMo to a single test instead of the entire test suite?"
it.slow(); isn't really helping. and I am not supposed to use waitForTimeout. Any ideas why?
it.only('should exit when save and exit button is pressed', async ({ page }) => {
it.slow();
await page.getByRole('button', { name: 'EDIT' }).click();
await page.getByText('SAVE AND EXIT', { exact: true }).click();
expect(page.url()).toContain('http://127.0.0.1:8080/home');
});https://playwright.dev/docs/api/class-frame#frame-wait-for-timeout
Never wait for timeout in production. Tests that wait for time are inherently flaky. Use Locator actions and web assertions that wait automatically.
I am using locator actions and web assertions that wait. And it's what I been told on here before from @mxschmitt
Related Ask AI answer for "How do I apply the slowMo setting to a single test in Playwright?".
Answer
Sure, you can apply slowmo to just one test in Playwright! You can use the test.slow() method to mark a specific test as "slow". This gives it triple the default timeout. Here's how you do it:
import { test } from '@playwright/test';
test('slow test', async ({ page }) => {
test.slow();
// Your test code goes here
});By using test.slow() in your test function, it gets more time to complete before timing out. But remember, you can't use test.slow() in a beforeAll or afterAll hook.
If you want to apply slowmo to all tests in a file or a test.describe() group, you can use the conditional version of test.slow(). Here's how:
import { test } from '@playwright/test';
test.slow(({ browserName }) => browserName === 'webkit');
test('slow in WebKit 1', async ({ page }) => {
// Your code goes here
});
test('skip in WebKit 2', async ({ page }) => {
// Your code goes here
});In this case, all tests in this file or group will be "slow" if the condition browserName === 'webkit' is true. This lets you apply slowmo to specific tests based on certain conditions. So, with test.slow(), you can mark a specific test as "slow" or apply it conditionally to multiple tests.
Related Discord Threads
Rayrun is a community for QA engineers. I am constantly looking for new ways to add value to people learning Playwright and other browser automation frameworks. If you have feedback, email luc@ray.run.