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| /**
* Copyright (c) 2014, Facebook, Inc. All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
'use strict';
var mocks = require('./moduleMocker');
var MS_IN_A_YEAR = 31536000000;
function FakeTimers(global, maxLoops) {
this._global = global;
this._uuidCounter = 1;
this._maxLoops = maxLoops || 100000;
this.reset();
// Store original timer APIs for future reference
this._originalTimerAPIs = {
setTimeout: global.setTimeout,
clearTimeout: global.clearTimeout,
setInterval: global.setInterval,
clearInterval: global.clearInterval
};
this._fakeTimerAPIs = {
setTimeout: mocks.getMockFn().mockImpl(
this._fakeSetTimeout.bind(this)
),
clearTimeout: mocks.getMockFn().mockImpl(
this._fakeClearTimer.bind(this)
),
setInterval: mocks.getMockFn().mockImpl(
this._fakeSetInterval.bind(this)
),
clearInterval: mocks.getMockFn().mockImpl(
this._fakeClearTimer.bind(this)
)
};
// If there's a process.nextTick on the global, mock it out
// (only applicable to node/node-emulating environments)
if (typeof global.process === 'object'
&& typeof global.process.nextTick === 'function') {
this._originalTimerAPIs.nextTick = global.process.nextTick;
this._fakeTimerAPIs.nextTick = mocks.getMockFn().mockImpl(
this._fakeNextTick.bind(this)
);
}
this.useFakeTimers();
// TODO: These globally-accessible function are now deprecated!
// They will go away very soon, so do not use them!
// Instead, use the versions available on the `jest` object
global.mockRunTicksRepeatedly = this.runAllTicks.bind(this);
global.mockRunTimersOnce = this.runOnlyPendingTimers.bind(this);
global.mockRunTimersToTime = this.runTimersToTime.bind(this);
global.mockRunTimersRepeatedly = this.runAllTimers.bind(this);
global.mockClearTimers = this.clearAllTimers.bind(this);
global.mockGetTimersCount = function() {
return Object.keys(this._timers).length;
}.bind(this);
}
FakeTimers.prototype.clearAllTimers = function() {
for (var uuid in this._timers) {
delete this._timers[uuid];
}
};
FakeTimers.prototype.reset = function() {
this._cancelledTicks = {};
this._now = 0;
this._ticks = [];
this._timers = {};
};
// Used to be called runTicksRepeatedly
FakeTimers.prototype.runAllTicks = function() {
// Only run a generous number of ticks and then bail.
// This is just to help avoid recursive loops
for (var i = 0; i < this._maxLoops; i++) {
var tick = this._ticks.shift();
if (tick === undefined) {
break;
}
if (!this._cancelledTicks.hasOwnProperty(tick.uuid)) {
tick.callback();
this._cancelledTicks[tick.uuid] = true;
}
}
if (i === this._maxLoops) {
throw new Error(
'Ran ' + this._maxLoops + ' ticks, and there are still more! Assuming ' +
'we\'ve hit an infinite recursion and bailing out...'
);
}
};
// Used to be called runTimersRepeatedly
FakeTimers.prototype.runAllTimers = function() {
this.runAllTicks();
// Only run a generous number of timers and then bail.
// This is just to help avoid recursive loops
for (var i = 0; i < this._maxLoops; i++) {
var nextTimerHandle = this._getNextTimerHandle();
// If there are no more timer handles, stop!
if (nextTimerHandle === null) {
break;
}
this._runTimerHandle(nextTimerHandle);
}
if (i === this._maxLoops) {
throw new Error(
'Ran ' + this._maxLoops + ' timers, and there are still more! Assuming ' +
'we\'ve hit an infinite recursion and bailing out...'
);
}
};
// Used to be called runTimersOnce
FakeTimers.prototype.runOnlyPendingTimers = function() {
var timers = this._timers;
Object.keys(timers)
.sort(function(left, right) {
return timers[left].expiry - timers[right].expiry;
})
.forEach(this._runTimerHandle, this);
};
// Use to be runTimersToTime
FakeTimers.prototype.runTimersToTime = function(msToRun) {
// Only run a generous number of timers and then bail.
// This is jsut to help avoid recursive loops
for (var i = 0; i < this._maxLoops; i++) {
var timerHandle = this._getNextTimerHandle();
// If there are no more timer handles, stop!
if (timerHandle === null) {
break;
}
var nextTimerExpiry = this._timers[timerHandle].expiry;
if (this._now + msToRun < nextTimerExpiry) {
// There are no timers between now and the target we're running to, so
// adjust our time cursor and quit
this._now += msToRun;
break;
} else {
msToRun -= (nextTimerExpiry - this._now);
this._now = nextTimerExpiry;
this._runTimerHandle(timerHandle);
}
}
if (i === this._maxLoops) {
throw new Error(
'Ran ' + this._maxLoops + ' timers, and there are still more! Assuming ' +
'we\'ve hit an infinite recursion and bailing out...'
);
}
};
FakeTimers.prototype.runWithRealTimers = function(cb) {
var hasNextTick =
typeof this._global.process === 'object'
&& typeof this._global.process.nextTick === 'function';
var prevSetTimeout = this._global.setTimeout;
var prevSetInterval = this._global.setInterval;
var prevClearTimeout = this._global.clearTimeout;
var prevClearInterval = this._global.clearInterval;
Iif (hasNextTick) {
var prevNextTick = this._global.process.nextTick;
}
this.useRealTimers();
var cbErr = null;
var errThrown = false;
try {
cb();
} catch (e) {
errThrown = true;
cbErr = e;
}
this._global.setTimeout = prevSetTimeout;
this._global.setInterval = prevSetInterval;
this._global.clearTimeout = prevClearTimeout;
this._global.clearInterval = prevClearInterval;
Iif (hasNextTick) {
this._global.process.nextTick = prevNextTick;
}
if (errThrown) {
throw cbErr;
}
};
FakeTimers.prototype.useRealTimers = function() {
var hasNextTick =
typeof this._global.process === 'object'
&& typeof this._global.process.nextTick === 'function';
this._global.setTimeout = this._originalTimerAPIs.setTimeout;
this._global.setInterval = this._originalTimerAPIs.setInterval;
this._global.clearTimeout = this._originalTimerAPIs.clearTimeout;
this._global.clearInterval = this._originalTimerAPIs.clearInterval;
if (hasNextTick) {
this._global.process.nextTick = this._originalTimerAPIs.nextTick;
}
};
FakeTimers.prototype.useFakeTimers = function() {
var hasNextTick =
typeof this._global.process === 'object'
&& typeof this._global.process.nextTick === 'function';
this._global.setTimeout = this._fakeTimerAPIs.setTimeout;
this._global.setInterval = this._fakeTimerAPIs.setInterval;
this._global.clearTimeout = this._fakeTimerAPIs.clearTimeout;
this._global.clearInterval = this._fakeTimerAPIs.clearInterval;
if (hasNextTick) {
this._global.process.nextTick = this._fakeTimerAPIs.nextTick;
}
};
FakeTimers.prototype._fakeClearTimer = function(uuid) {
if (this._timers.hasOwnProperty(uuid)) {
delete this._timers[uuid];
}
};
FakeTimers.prototype._fakeNextTick = function(callback) {
var uuid = this._uuidCounter++;
this._ticks.push({
uuid: uuid,
callback: callback
});
var cancelledTicks = this._cancelledTicks;
this._originalTimerAPIs.nextTick(function() {
if (!cancelledTicks.hasOwnProperty(uuid)) {
callback();
cancelledTicks[uuid] = true;
}
});
};
FakeTimers.prototype._fakeSetInterval = function(callback, intervalDelay) {
if (intervalDelay === undefined || intervalDelay === null) {
intervalDelay = 0;
}
var args = [];
for (var ii = 2, ll = arguments.length; ii < ll; ii++) {
args.push(arguments[ii]);
}
var uuid = this._uuidCounter++;
this._timers[uuid] = {
type: 'interval',
callback: function() {
return callback.apply(null, args);
},
expiry: this._now + intervalDelay,
interval: intervalDelay
};
return uuid;
};
FakeTimers.prototype._fakeSetTimeout = function(callback, delay) {
if (delay === undefined || delay === null) {
delay = 0;
}
var args = [];
for (var ii = 2, ll = arguments.length; ii < ll; ii++) {
args.push(arguments[ii]);
}
var uuid = this._uuidCounter++;
this._timers[uuid] = {
type: 'timeout',
callback: function() {
return callback.apply(null, args);
},
expiry: this._now + delay,
interval: null
};
return uuid;
};
FakeTimers.prototype._getNextTimerHandle = function() {
var nextTimerHandle = null;
var uuid;
var soonestTime = MS_IN_A_YEAR;
var timer;
for (uuid in this._timers) {
timer = this._timers[uuid];
if (timer.expiry < soonestTime) {
soonestTime = timer.expiry;
nextTimerHandle = uuid;
}
}
return nextTimerHandle;
};
FakeTimers.prototype._runTimerHandle = function(timerHandle) {
var timer = this._timers[timerHandle];
switch (timer.type) {
case 'timeout':
var callback = timer.callback;
delete this._timers[timerHandle];
callback();
break;
case 'interval':
timer.expiry = this._now + timer.interval;
timer.callback();
break;
default:
throw new Error('Unexepcted timer type: ' + timer.type);
}
};
module.exports = FakeTimers;
|