mongodb-memory-server/lib/util/mongo_killer.js

In-memory MongoDB Server. Designed with testing in mind, the server will allow you to connect your favourite ODM or client library to the MongoDB Server and run integration tests isolated from each other.

"use strict";

/* eslint-disable */

/*
    make sure every few seconds that parent is still alive
    and if it is dead, we will kill child too.
    this is to ensure that exits done via kill
    wont leave mongod around
*/
var parentPid = parseInt(process.argv[2], 10);
var childPid = parseInt(process.argv[3], 10);

if (parentPid && childPid) {
  setInterval(() => {
    // if parent dead
    try {
      process.kill(parentPid, 0);
    } catch (e) {
      try {
        process.kill(childPid);
      } catch (ee) {// doesnt matter if it is dead
      }

      process.exit();
    } // if child dead


    try {
      process.kill(childPid, 0);
    } catch (e) {
      process.exit();
    }
  }, 2000);
}