src/third_party/devtools/node_modules/qjobs/tests/pause.js

#!/usr/bin/env node
var assert = require('assert');
var qjob = require('../qjobs');

var maxConcurrency = 2;
var q = new qjob({maxConcurrency:maxConcurrency});

var testExecutedJobs = 0;
var testStartFired = false;
var testEndFired = false;
var testJobsStartFired = 0;
var testJobsEndFired = 0;
var testConcurrency = 0;
var testPause = false;
var testUnpause = false;

var myjob = function(args,next) {
    setTimeout(function() {
        testExecutedJobs++;
        next();
    },50);
}

// Let's add 10 job and add them to the queue
for (var i = 0; i<10; i++) {
    q.add(myjob,['test'+i]);
}

q.on('start',function() {
    testStartFired = true;
});

q.on('jobStart',function() {
    var running = q.stats()._jobsRunning;
    if (running>testConcurrency) testConcurrency = running;
    testJobsStartFired++;
    if (testJobsStartFired == 5) {
        q.pause(true);
    }
});

q.on('jobEnd',function() {
    testJobsEndFired++;
});

q.on('end',function() {
    testEndFired = true;
    assert.equal(testExecutedJobs, 10);
    assert.equal(testJobsStartFired,10);
    assert.equal(testJobsEndFired,10);
    assert.equal(testConcurrency,maxConcurrency);
    assert.ok(testStartFired);
    assert.ok(testPause);
    assert.ok(testUnpause);
});

q.on('pause',function(since) {
    testPause = true;
    if (since>2000) {
        q.pause(false);
    }
});

q.on('unpause',function() {
    testUnpause = true;
});

var running = q.stats()._jobsRunning;

assert.equal(testExecutedJobs,0);
assert.equal(testJobsStartFired,0);
assert.equal(testJobsEndFired,0);
assert.equal(running,0);
assert.ok(!testStartFired);
assert.ok(!testEndFired);
assert.ok(!testPause);
assert.ok(!testUnpause);

q.run();