web-test-runner.config.mjs

// import { playwrightLauncher } from '@web/test-runner-playwright';
import { esbuildPlugin } from '@web/dev-server-esbuild';

export default /** @type {import("@web/test-runner").TestRunnerConfig} */ ({
  /** we run test directly on TypeScript files */
  plugins: [esbuildPlugin({ ts: true })],

  /** Resolve bare module imports */
  nodeResolve: true,

  /** filter browser logs
   * Plugins have a fix URL and do not fit to the file structure in test environment.
   * Creating open-scd in the tests leads to error in the browser log - we had to disable the browser log
  */
  browserLogs: false,

  /** specify groups for unit and integrations tests 
   * hint: no --group definition runs all groups
  */
  groups: [
    {
      name: 'unit',
      files: 'test/unit/**/*.test.ts',
    },
    {
      name: 'integration',
      files: 'test/integration/**/*.test.ts',
    },
  ],
  
  /** Compile JS for older browsers. Requires @web/dev-server-esbuild plugin */
  // esbuildTarget: 'auto',

  /** Amount of browsers to run concurrently */
  // concurrentBrowsers: 2,

  /** Amount of test files per browser to test concurrently */
  // concurrency: 1,

  /** Browsers to run tests on */
  // browsers: [
  //   playwrightLauncher({ product: 'chromium' }),
  //   playwrightLauncher({ product: 'firefox' }),
  //   playwrightLauncher({ product: 'webkit' }),
  // ],

  // See documentation for all available options
});