zurvan/tests/ProcessTimersTests.js

A library for simulating time in Node.js

'use strict';
var assert = require('assert');
var zurvan = require('../zurvan');

describe('zurvan', function() {
  describe('after stopping time', function() {
    beforeEach(function() {
      return zurvan.interceptTimers();
    });

    afterEach(function() {
      return zurvan.releaseTimers();
    });

    it('resets process timers', function(done) {
      assert.equal(0, process.uptime());
      assert.deepEqual([0, 0], process.hrtime());
      done();
    });

    it('advances all times together, asynchronously', function(done) {
      setTimeout(function() {
        assert.equal(1.523, process.uptime());
        assert.deepEqual([1, 523e6], process.hrtime());
      }, 1523);

      zurvan.advanceTime(1600).then(function() {
        assert.equal(1.6, process.uptime());
        assert.deepEqual([1, 600e6], process.hrtime());
        done();
      });
    });

    it('can calculate diff in process.hrtime', function(done) {
      var previousHrtime;
      setTimeout(function() {
        previousHrtime = process.hrtime();
        assert.deepEqual([1, 523e6], previousHrtime);

        setTimeout(function() {
          var hrtimeDiff = process.hrtime(previousHrtime);
          assert.deepEqual([10, 244e6], process.hrtime());
          assert.deepEqual([8, 721e6], hrtimeDiff);
        }, 8721);
      }, 1523);

      zurvan
        .advanceTime(11000)
        .then(function() {
          assert.deepEqual(process.hrtime(), [11, 0]);
        })
        .then(done, done);
    });
  });
});