zurvan/tests/GlobalConfigurationTests.js

A library for simulating time in Node.js

'use strict';
var TimeUnit = require('../TimeUnit');
var zurvan = require('../zurvan').withDefaultConfiguration({
  systemTime: '2015-09-01T00:00:00.000Z'
});

var assert = require('assert');

describe('zurvan with globally configured time to 2015-09-01T00:00:00.000Z', function() {
  it('without additional configuration returns Date() = 2015-09-01T00:00:00.000Z', function() {
    return zurvan
      .interceptTimers()
      .then(function() {
        assert.equal(new Date().toISOString(), '2015-09-01T00:00:00.000Z');
        assert.equal(process.uptime(), 0);
        return zurvan.advanceTime(TimeUnit.days(3));
      })
      .then(function() {
        assert.equal(new Date().toISOString(), '2015-09-04T00:00:00.000Z');
        assert.equal(process.uptime(), 3 * 24 * 60 * 60);
        return zurvan.releaseTimers();
      });
  });

  it('with additional local configuration global settings are overridden, but only for this single interception period', function() {
    return zurvan
      .interceptTimers({ systemTime: '2010-01-05T05:55:11.158Z' })
      .then(function() {
        assert.equal(new Date().toISOString(), '2010-01-05T05:55:11.158Z');
        assert.equal(process.uptime(), 0);
        return zurvan.advanceTime(TimeUnit.hours(4));
      })
      .then(function() {
        assert.equal(new Date().toISOString(), '2010-01-05T09:55:11.158Z');
        assert.equal(process.uptime(), 4 * 60 * 60);
        return zurvan.releaseTimers();
      })
      .then(function() {
        return zurvan.interceptTimers();
      })
      .then(function() {
        assert.equal(new Date().toISOString(), '2015-09-01T00:00:00.000Z');
        assert.equal(process.uptime(), 0);
        return zurvan.releaseTimers();
      });
  });

  it('does not interfere with other options set on lower level', function() {
    return zurvan
      .interceptTimers({ timeSinceStartup: 60 })
      .then(function() {
        assert.equal(new Date().toISOString(), '2015-09-01T00:00:00.000Z');
        assert.equal(process.uptime(), 60);
        return zurvan.advanceTime(TimeUnit.seconds(4));
      })
      .then(function() {
        assert.equal(new Date().toISOString(), '2015-09-01T00:00:04.000Z');
        assert.equal(process.uptime(), 64);
        return zurvan.releaseTimers();
      });
  });
});