Chai helper to check if a pid is running.

README.md

.alive

Used to determine if a process pid is running from node.js.

expect(1234).to.be.alive;

helper.js

chai.Assertion.addProperty('alive', function () {
  new chai.Assertion(this._obj).to.be.a('number');
  var alive = true
    , pid = this._obj;

  try { process.kill(pid, 0); }
  catch (ex) { if (ex.code == 'ESRCH') alive = false; }

  this.assert(
      alive === true
    , 'expected pid #{this} to be alive'
    , 'expected pid #{this} to not be alive'
  );
});