run_multiple.js

function runSuite(suite, suiteConf, browser) {
  // Start: New Code
  // check chunks, if chunks are set, expand suite
  if(suiteConf.chunks && Number.isFinite(suiteConf.chunks)) {
    let pattern = config.tests || null;

    if (pattern) {
      let forks = [];
      let files = findFiles(pattern);
      let chunkSize = Math.ceil(files.length/suiteConf.chunks);
      let chunks = createChunks(files, chunkSize);
      let chunkConfig = { ...suiteConf };

      delete chunkConfig.chunks;

      chunks.map((chunk, index) => {
        const tests = createGlob(chunk);
        const name = `${suite}-${index}`;
        const fork = runSuite(name , { ...chunkConfig, tests }, browser);

        if (Array.isArray(fork)) {
          forks.push(...fork);
        } else {
          forks.push(fork);
        }
      });

      if (forks.length > 0) {
        return forks;
      }
    }
  }
  
  // End: New Code
  // ...
  if (!browser) {