index.js
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const expect = require('chai').expect;
const exec = require('child_process').exec;
const reorder = require('../lib/reorder');
const flaggedRespawn = require('../');
describe('flaggedRespawn', function () {
var flags = ['--harmony', '--use_strict', '--stack_size']
describe('reorder', function () {
it('should re-order args, placing special flags first', function () {
var needsRespawn = ['node', 'file.js', '--flag', '--harmony', 'command'];
var noRespawnNeeded = ['node', 'bin/flagged-respawn', 'thing'];
expect(reorder(flags, needsRespawn))
.to.deep.equal(['node', '--harmony', 'file.js', '--flag', 'command']);
expect(reorder(flags, noRespawnNeeded))
.to.deep.equal(noRespawnNeeded);
});
it('should keep flags values when not placed first', function () {
var args = ['node', 'file.js', '--stack_size=2048'];
var expected = ['node', '--stack_size=2048', 'file.js'];
expect(reorder(flags, args)).to.deep.equal(expected);
});
it('should ignore special flags when they are in the correct position', function () {
var args = ['node', '--harmony', 'file.js', '--flag'];
expect(reorder(flags, reorder(flags, args))).to.deep.equal(args);
});
});
describe('execute', function () {
it('should throw if no flags are specified', function () {
expect(function () { flaggedRespawn.execute(); }).to.throw;
});
it('should throw if no argv is specified', function () {
expect(function () { flaggedRespawn.execute(flags); }).to.throw;
});
it('should respawn and pipe stderr/stdout to parent', function (done) {
exec('node ./test/bin/respawner.js --harmony', function (err, stdout, stderr) {
expect(stdout.replace(/[0-9]/g, '')).to.equal('Special flags found, respawning.\nRespawned to PID: \nRunning!\n');
done();
});
});
it('should respawn and pass exit code from child to parent', function (done) {
exec('node ./test/bin/exit_code.js --harmony', function (err, stdout, stderr) {
expect(err.code).to.equal(100);
done();
});
});
it.skip('should respawn; if child is killed, parent should exit with same signal', function (done) {
// TODO: figure out why travis hates this
exec('node ./test/bin/signal.js --harmony', function (err, stdout, stderr) {
console.log('err', err);
console.log('stdout', stdout);
console.log('stderr', stderr);
expect(err.signal).to.equal('SIGHUP');
done();
});
});
it('should call back with ready as true when respawn is not needed', function () {
var argv = ['node', './test/bin/respawner'];
flaggedRespawn(flags, argv, function (ready) {
expect(ready).to.be.true;
});
});
it('should call back with ready as false when respawn is needed', function () {
var argv = ['node', './test/bin/respawner', '--harmony'];
flaggedRespawn(flags, argv, function (ready) {
expect(ready).to.be.false;
});
});
it('should call back with the child process when ready', function () {
var argv = ['node', './test/bin/respawner', '--harmony'];
flaggedRespawn(flags, argv, function (ready, child) {
expect(child.pid).to.not.equal(process.pid);
});
});
it('should call back with own process when respawn not needed', function () {
var argv = ['node', './test/bin/respawner'];
flaggedRespawn(flags, argv, function (ready, child) {
expect(child.pid).to.equal(process.pid);
});
});
});
});