createFakeUuid.js

/**
 * Convenience method for creating not rigorously random uuids to help with testing staging and development APIs
 * Definition based off this answer: https://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid#answer-105074
 */
function createFakeUuid () {
  return 'xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx'.split('').map(x => {
    const chars = '0123456789abcdef';
    const seed = Math.random();
    switch (x) {
      case 'M':
        return chars[Math.round(seed * 5 + 1)];
      case 'N':
        return chars[Math.round(seed * 2 + 8)];
      case '-':
        return x;
      default:
        return chars[Math.round(seed * 16)];
    }
  }).join('');
}