Playwright - won't launch full screen

Question

I am launching my text execution with the new playwright test runner. Unfortunately I can't get it to start in a full screen mode.

I am using the following code:

const { test, expect } = require('@playwright/test');
const { HomePage } = require('../lib/Homepages');
const playwright = require('@playwright/test');

test.describe('Home Test Suite', () => {
    let homePage;

    test.beforeAll(async () => {
        const browser = await playwright.chromium.launch({ args: ['--start-maximized'] });
        const context = await browser.newContext({ viewport: null });
        const page = await context.newPage();
        homePage = new HomePage(page);
        await homePage.loadapp();
    });

    test.afterAll(async ({ browser }) => {
        await browser.close();
    });

    test.describe('test1', () => {
        test('test', async () => {
            expect(await homepage.x()).toBeTruthy();
            // Act
            await homePage.dosomething('Word');

            // Assert
            expect(await homePage.isItCorrect()).toBeTruthy;
        });
   });
   });

After running npm run test. I receive the following error:

browser.newContext: "deviceScaleFactor" option is not supported with null "viewport"

Any idea how to get it to work?

Answer 1

The error was caused by the playwright.config.js.

I had the following code:

    projects: [
        {
            name: 'chromium',
            use: {
                ...devices['Desktop Chrome'],
            },
        },
]

Commenting out the 'use' has fixed the issue.