zurvan/detail/AllTimersInterceptor.js

A library for simulating time in Node.js

'use strict';
var TimerInterceptor = require('./TimerInterceptor');
var SequenceGenerator = require('./utils/SequenceGenerator');
var TimerTypes = require('./timers/TimerTypes');
var TimerExpirationPolicies = require('./TimerExpirationPolicies');

var FieldOverrider = require('./utils/FieldOverrider');

function AllTimersInterceptor(timeServer) {
  this._sequenceGenerator = new SequenceGenerator();
  this._timeoutInterceptor = new TimerInterceptor(
    timeServer,
    TimerTypes.timeout
  );
  this._intervalInterceptor = new TimerInterceptor(
    timeServer,
    TimerTypes.interval
  );
}

AllTimersInterceptor.prototype.intercept = function(config) {
  this._timeoutInterceptor.intercept(config, this._sequenceGenerator);
  this._intervalInterceptor.intercept(config, this._sequenceGenerator);

  this._timerExpirationPolicy =
    TimerExpirationPolicies[config.timerExpirationPolicy];
};

AllTimersInterceptor.prototype.release = function() {
  var timers = {};
  timers.timeouts = this._timeoutInterceptor.release();
  timers.intervals = this._intervalInterceptor.release();

  return timers;
};

AllTimersInterceptor.prototype.lastTimeout = function() {
  return this._timeoutInterceptor.lastTimer();
};

AllTimersInterceptor.prototype._nextTimersGroup = function(
  nextTimeouts,
  nextIntervals
) {
  if (!nextTimeouts[0]) {
    return nextIntervals;
  }

  if (!nextIntervals[0]) {
    return nextTimeouts;
  }

  if (nextTimeouts[0].dueTime.isShorterThan(nextIntervals[0].dueTime)) {
    return nextTimeouts;
  }

  if (nextTimeouts[0].dueTime.isEqualTo(nextIntervals[0].dueTime)) {
    return this._timerExpirationPolicy.selectGroup(nextTimeouts, nextIntervals);
  }

  return nextIntervals;
};

AllTimersInterceptor.prototype.nextTimer = function() {
  var nextTimeouts = this._timeoutInterceptor.nextTimers();
  var nextIntervals = this._intervalInterceptor.nextTimers();

  return this._timerExpirationPolicy.selectElement(
    this._nextTimersGroup(nextTimeouts, nextIntervals)
  );
};

module.exports = AllTimersInterceptor;