text: // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  // SPDX-License-Identifier: MIT-0
  
  'use strict';
  
  // Do this as the first thing so that any code reading it knows the right env.
  process.env.BABEL_ENV = 'test';
  process.env.NODE_ENV = 'test';
  process.env.PUBLIC_URL = '';
  process.env.TZ = 'UTC';
  // Makes the script crash on unhandled rejections instead of silently
  // ignoring them. In the future, promise rejections that are not handled will
  // terminate the Node.js process with a non-zero exit code.
  process.on('unhandledRejection', err => {
    throw err;
  });
  
  // Ensure environment variables are read.
  require('../configuration/env');
  
  
  const jest = require('jest');
  const execSync = require('child_process').execSync;
  let argv = process.argv.slice(2);
  
  function isInGitRepository() {
    try {
      execSync('git rev-parse --is-inside-work-tree', { stdio: 'ignore' });
      return true;
    } catch (e) {
      return false;
    }
  }
  
  function isInMercurialRepository() {
    try {
      execSync('hg --cwd . root', { stdio: 'ignore' });
      return true;
    } catch (e) {
      return false;
    }
  }
  
  // Watch unless on CI, in coverage mode, or explicitly running all tests
  if (
    !process.env.CI &&
    argv.indexOf('--coverage') === -1 &&
    argv.indexOf('--watchAll') === -1
  ) {
    // https://github.com/facebook/create-react-app/issues/5210
    const hasSourceControl = isInGitRepository() || isInMercurialRepository();
    argv.push(hasSourceControl ? '--watch' : '--watchAll');
  }
  
  
  jest.run(argv);
  