second-hand-process.js

/*
 *  Initially, test runs were handled via a single executable
 *  causing many large objects and references from within setup
 *  code, and perhaps vows, to hang around despite garbage collection.
 */
(function runFile(i) {
  if (i > filenames.length) {
    return exit();
  }
  const filename = filenames[i];
  
  let file;
  // ...try/catch load file
  
  file.vows(new Tools(file.options || {})).run((results) => {
    // ...process results, aggregate, store filename for later
    return runFile(i + 1);
  });
})(0);

/*
 *  In order to insulate itself from bloat, the main process
 *  creates a fork responsible for running the current test file
 *  via its own child process using ChildProcess.execFile, then
 *  the forked process reports back to the main process via Redis.
 */
(function orchestrate() {
  if (_.isEmpty(filenames)) {
    return exit();
  }
  
  const filename = filenames.shift();
  let file;
  // ...try/catch load file, check against requested suites or filenames if applicable
  
  const child = childProcess.fork(CHILD_PATH, [filename]);
  // ...store child's pid to ensure it's killed when the parent process exits
  
  child.on('close', () => {
    // ...store filename for later
    
    fetchResultsFromRedis(filename, orchestrate);
  });
})();