const semver = require('semver');

const fs = require('fs');

const ReactVersionSrc = fs.readFileSync(require.resolve('shared/ReactVersion'));

const reactVersion = /export default '([^']+)';/.exec(ReactVersionSrc)[1];

const config = {

  use: {

    headless: true,

    browserName: 'chromium',

    launchOptions: {

      // This bit of delay gives async React time to render

      // and DevTools operations to be sent across the bridge.

      slowMo: 100,

    },

    url: process.env.REACT_VERSION

      ? 'http://localhost:8080/e2e-regression.html'

      : 'http://localhost:8080/e2e.html',

    react_version: process.env.REACT_VERSION

      ? semver.coerce(process.env.REACT_VERSION).version

      : reactVersion,

    trace: 'retain-on-failure',

  },

  // Some of our e2e tests can be flaky. Retry tests to make sure the error isn't transient

  retries: 3,

};

module.exports = config;