Parallelize playwright tests

- allow running with multiple workers (tested with up to four workers locally which
  didn't show signs of flakiness)
- prevent race condition with webauthn tests (running them in parallel
  on the same user could prevent another test from logging in)
- fix flakiness on CI action status (Chromium sometimes needs a long
  time to fill the href field, firefox is always faster)

This reverts commit e8585eff5c.

playwright.config.js

@@ -11,18 +11,14 @@ export default {
   testDir: './tests/e2e/',
   testMatch: /.*\.test\.e2e\.js/, // Match any .test.e2e.js files
 
-  /**
-   * Only run one test at a time, running multiple could lead to a inconsistent
-   * database state.
-   */
-  fullyParallel: false,
-  workers: 1,
+  // you can adjust this value locally to match your machine's power,
+  // or pass `--workers x` to playwright
+  workers: process.env.CI ? 1 : 2,
 
   /* Maximum time one test can run for. */
   timeout: 30 * 1000,
 
   expect: {
-
     /**
      * Maximum time expect() should wait for the condition to be met.
      * For example in `await expect(locator).toHaveText();`
@@ -34,7 +30,7 @@ export default {
   forbidOnly: Boolean(process.env.CI),
 
   /* Retry on CI only */
-  retries: process.env.CI ? 2 : 0,
+  retries: process.env.CI ? 1 : 0,
 
   /* Reporter to use. See https://playwright.dev/docs/test-reporters */
   reporter: process.env.CI ? 'list' : [['list'], ['html', {outputFolder: 'tests/e2e/reports/', open: 'never'}]],

tests/e2e/dashboard-ci-status.test.e2e.js

@@ -16,6 +16,6 @@ test('Correct link and tooltip', async ({browser}, workerInfo) => {
 
   const repoStatus = page.locator('.dashboard-repos .repo-owner-name-list > li:nth-child(1) > a:nth-child(2)');
 
-  await expect(repoStatus).toHaveAttribute('href', '/user2/test_workflows/actions');
+  await expect(repoStatus).toHaveAttribute('href', '/user2/test_workflows/actions', {timeout: 10000});
   await expect(repoStatus).toHaveAttribute('data-tooltip-content', 'Failure');
 });

tests/e2e/webauthn.test.e2e.js

@@ -6,12 +6,12 @@ import {expect} from '@playwright/test';
 import {test, login_user, load_logged_in_context} from './utils_e2e.js';
 
 test.beforeAll(async ({browser}, workerInfo) => {
-  await login_user(browser, workerInfo, 'user2');
+  await login_user(browser, workerInfo, 'user40');
 });
 
 test('WebAuthn register & login flow', async ({browser}, workerInfo) => {
   test.skip(workerInfo.project.name !== 'chromium', 'Uses Chrome protocol');
-  const context = await load_logged_in_context(browser, workerInfo, 'user2');
+  const context = await load_logged_in_context(browser, workerInfo, 'user40');
   const page = await context.newPage();
 
   // Register a security key.
@@ -45,7 +45,7 @@ test('WebAuthn register & login flow', async ({browser}, workerInfo) => {
   response = await page.goto('/user/login');
   await expect(response?.status()).toBe(200);
 
-  await page.getByLabel('Username or email address').fill('user2');
+  await page.getByLabel('Username or email address').fill('user40');
   await page.getByLabel('Password').fill('password');
   await page.getByRole('button', {name: 'Sign in'}).click();
   await page.waitForURL(`${workerInfo.project.use.baseURL}/user/webauthn`);