setup-python/node_modules/@jest/fake-timers/build/jestFakeTimers.js
Danny McCormick 39c08a0eaa Initial pass
2019-06-26 21:12:00 -04:00

556 lines
14 KiB
JavaScript

'use strict';
Object.defineProperty(exports, '__esModule', {
value: true
});
exports.default = void 0;
function _jestMessageUtil() {
const data = require('jest-message-util');
_jestMessageUtil = function _jestMessageUtil() {
return data;
};
return data;
}
function _defineProperty(obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
const MS_IN_A_YEAR = 31536000000; // TODO: Copied from `jest-util` to avoid cyclic dependency. Import from `jest-util` in the next major
const setGlobal = (globalToMutate, key, value) => {
// @ts-ignore: no index
globalToMutate[key] = value;
};
class FakeTimers {
constructor({global, moduleMocker, timerConfig, config, maxLoops}) {
_defineProperty(this, '_cancelledImmediates', void 0);
_defineProperty(this, '_cancelledTicks', void 0);
_defineProperty(this, '_config', void 0);
_defineProperty(this, '_disposed', void 0);
_defineProperty(this, '_fakeTimerAPIs', void 0);
_defineProperty(this, '_global', void 0);
_defineProperty(this, '_immediates', void 0);
_defineProperty(this, '_maxLoops', void 0);
_defineProperty(this, '_moduleMocker', void 0);
_defineProperty(this, '_now', void 0);
_defineProperty(this, '_ticks', void 0);
_defineProperty(this, '_timerAPIs', void 0);
_defineProperty(this, '_timers', void 0);
_defineProperty(this, '_uuidCounter', void 0);
_defineProperty(this, '_timerConfig', void 0);
this._global = global;
this._timerConfig = timerConfig;
this._config = config;
this._maxLoops = maxLoops || 100000;
this._uuidCounter = 1;
this._moduleMocker = moduleMocker; // Store original timer APIs for future reference
this._timerAPIs = {
clearImmediate: global.clearImmediate,
clearInterval: global.clearInterval,
clearTimeout: global.clearTimeout,
nextTick: global.process && global.process.nextTick,
setImmediate: global.setImmediate,
setInterval: global.setInterval,
setTimeout: global.setTimeout
};
this.reset();
this._createMocks();
}
clearAllTimers() {
this._immediates.forEach(immediate =>
this._fakeClearImmediate(immediate.uuid)
);
this._timers.clear();
}
dispose() {
this._disposed = true;
this.clearAllTimers();
}
reset() {
this._cancelledTicks = {};
this._cancelledImmediates = {};
this._now = 0;
this._ticks = [];
this._immediates = [];
this._timers = new Map();
}
runAllTicks() {
this._checkFakeTimers(); // Only run a generous number of ticks and then bail.
// This is just to help avoid recursive loops
let i;
for (i = 0; i < this._maxLoops; i++) {
const tick = this._ticks.shift();
if (tick === undefined) {
break;
}
if (!this._cancelledTicks.hasOwnProperty(tick.uuid)) {
// Callback may throw, so update the map prior calling.
this._cancelledTicks[tick.uuid] = true;
tick.callback();
}
}
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..."
);
}
}
runAllImmediates() {
this._checkFakeTimers(); // Only run a generous number of immediates and then bail.
let i;
for (i = 0; i < this._maxLoops; i++) {
const immediate = this._immediates.shift();
if (immediate === undefined) {
break;
}
this._runImmediate(immediate);
}
if (i === this._maxLoops) {
throw new Error(
'Ran ' +
this._maxLoops +
' immediates, and there are still more! Assuming ' +
"we've hit an infinite recursion and bailing out..."
);
}
}
_runImmediate(immediate) {
if (!this._cancelledImmediates.hasOwnProperty(immediate.uuid)) {
// Callback may throw, so update the map prior calling.
this._cancelledImmediates[immediate.uuid] = true;
immediate.callback();
}
}
runAllTimers() {
this._checkFakeTimers();
this.runAllTicks();
this.runAllImmediates(); // Only run a generous number of timers and then bail.
// This is just to help avoid recursive loops
let i;
for (i = 0; i < this._maxLoops; i++) {
const nextTimerHandle = this._getNextTimerHandle(); // If there are no more timer handles, stop!
if (nextTimerHandle === null) {
break;
}
this._runTimerHandle(nextTimerHandle); // Some of the immediate calls could be enqueued
// during the previous handling of the timers, we should
// run them as well.
if (this._immediates.length) {
this.runAllImmediates();
}
if (this._ticks.length) {
this.runAllTicks();
}
}
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..."
);
}
}
runOnlyPendingTimers() {
// We need to hold the current shape of `this._timers` because existing
// timers can add new ones to the map and hence would run more than necessary.
// See https://github.com/facebook/jest/pull/4608 for details
const timerEntries = Array.from(this._timers.entries());
this._checkFakeTimers();
this._immediates.forEach(this._runImmediate, this);
timerEntries
.sort(([, left], [, right]) => left.expiry - right.expiry)
.forEach(([timerHandle]) => this._runTimerHandle(timerHandle));
}
advanceTimersByTime(msToRun) {
this._checkFakeTimers(); // Only run a generous number of timers and then bail.
// This is just to help avoid recursive loops
let i;
for (i = 0; i < this._maxLoops; i++) {
const timerHandle = this._getNextTimerHandle(); // If there are no more timer handles, stop!
if (timerHandle === null) {
break;
}
const timerValue = this._timers.get(timerHandle);
if (timerValue === undefined) {
break;
}
const nextTimerExpiry = timerValue.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..."
);
}
}
runWithRealTimers(cb) {
const prevClearImmediate = this._global.clearImmediate;
const prevClearInterval = this._global.clearInterval;
const prevClearTimeout = this._global.clearTimeout;
const prevNextTick = this._global.process.nextTick;
const prevSetImmediate = this._global.setImmediate;
const prevSetInterval = this._global.setInterval;
const prevSetTimeout = this._global.setTimeout;
this.useRealTimers();
let cbErr = null;
let errThrown = false;
try {
cb();
} catch (e) {
errThrown = true;
cbErr = e;
}
this._global.clearImmediate = prevClearImmediate;
this._global.clearInterval = prevClearInterval;
this._global.clearTimeout = prevClearTimeout;
this._global.process.nextTick = prevNextTick;
this._global.setImmediate = prevSetImmediate;
this._global.setInterval = prevSetInterval;
this._global.setTimeout = prevSetTimeout;
if (errThrown) {
throw cbErr;
}
}
useRealTimers() {
const global = this._global;
setGlobal(global, 'clearImmediate', this._timerAPIs.clearImmediate);
setGlobal(global, 'clearInterval', this._timerAPIs.clearInterval);
setGlobal(global, 'clearTimeout', this._timerAPIs.clearTimeout);
setGlobal(global, 'setImmediate', this._timerAPIs.setImmediate);
setGlobal(global, 'setInterval', this._timerAPIs.setInterval);
setGlobal(global, 'setTimeout', this._timerAPIs.setTimeout);
global.process.nextTick = this._timerAPIs.nextTick;
}
useFakeTimers() {
this._createMocks();
const global = this._global;
setGlobal(global, 'clearImmediate', this._fakeTimerAPIs.clearImmediate);
setGlobal(global, 'clearInterval', this._fakeTimerAPIs.clearInterval);
setGlobal(global, 'clearTimeout', this._fakeTimerAPIs.clearTimeout);
setGlobal(global, 'setImmediate', this._fakeTimerAPIs.setImmediate);
setGlobal(global, 'setInterval', this._fakeTimerAPIs.setInterval);
setGlobal(global, 'setTimeout', this._fakeTimerAPIs.setTimeout);
global.process.nextTick = this._fakeTimerAPIs.nextTick;
}
getTimerCount() {
this._checkFakeTimers();
return this._timers.size + this._immediates.length + this._ticks.length;
}
_checkFakeTimers() {
if (this._global.setTimeout !== this._fakeTimerAPIs.setTimeout) {
this._global.console.warn(
`A function to advance timers was called but the timers API is not ` +
`mocked with fake timers. Call \`jest.useFakeTimers()\` in this ` +
`test or enable fake timers globally by setting ` +
`\`"timers": "fake"\` in ` +
`the configuration file. This warning is likely a result of a ` +
`default configuration change in Jest 15.\n\n` +
`Release Blog Post: https://jestjs.io/blog/2016/09/01/jest-15.html\n` +
`Stack Trace:\n` +
(0, _jestMessageUtil().formatStackTrace)(
new Error().stack,
this._config,
{
noStackTrace: false
}
)
);
}
}
_createMocks() {
const fn = (
impl // @ts-ignore TODO: figure out better typings here
) => this._moduleMocker.fn().mockImplementation(impl); // TODO: add better typings; these are mocks, but typed as regular timers
this._fakeTimerAPIs = {
clearImmediate: fn(this._fakeClearImmediate.bind(this)),
clearInterval: fn(this._fakeClearTimer.bind(this)),
clearTimeout: fn(this._fakeClearTimer.bind(this)),
nextTick: fn(this._fakeNextTick.bind(this)),
setImmediate: fn(this._fakeSetImmediate.bind(this)),
setInterval: fn(this._fakeSetInterval.bind(this)),
setTimeout: fn(this._fakeSetTimeout.bind(this))
};
}
_fakeClearTimer(timerRef) {
const uuid = this._timerConfig.refToId(timerRef);
if (uuid) {
this._timers.delete(String(uuid));
}
}
_fakeClearImmediate(uuid) {
this._cancelledImmediates[uuid] = true;
}
_fakeNextTick(callback, ...args) {
if (this._disposed) {
return;
}
const uuid = String(this._uuidCounter++);
this._ticks.push({
callback: (function(_callback) {
function callback() {
return _callback.apply(this, arguments);
}
callback.toString = function() {
return _callback.toString();
};
return callback;
})(() => callback.apply(null, args)),
uuid
});
const cancelledTicks = this._cancelledTicks;
this._timerAPIs.nextTick(() => {
if (!cancelledTicks.hasOwnProperty(uuid)) {
// Callback may throw, so update the map prior calling.
cancelledTicks[uuid] = true;
callback.apply(null, args);
}
});
}
_fakeSetImmediate(callback, ...args) {
if (this._disposed) {
return null;
}
const uuid = this._uuidCounter++;
this._immediates.push({
callback: (function(_callback2) {
function callback() {
return _callback2.apply(this, arguments);
}
callback.toString = function() {
return _callback2.toString();
};
return callback;
})(() => callback.apply(null, args)),
uuid: String(uuid)
});
const cancelledImmediates = this._cancelledImmediates;
this._timerAPIs.setImmediate(() => {
if (!cancelledImmediates.hasOwnProperty(uuid)) {
// Callback may throw, so update the map prior calling.
cancelledImmediates[String(uuid)] = true;
callback.apply(null, args);
}
});
return uuid;
}
_fakeSetInterval(callback, intervalDelay, ...args) {
if (this._disposed) {
return null;
}
if (intervalDelay == null) {
intervalDelay = 0;
}
const uuid = this._uuidCounter++;
this._timers.set(String(uuid), {
callback: (function(_callback3) {
function callback() {
return _callback3.apply(this, arguments);
}
callback.toString = function() {
return _callback3.toString();
};
return callback;
})(() => callback.apply(null, args)),
expiry: this._now + intervalDelay,
interval: intervalDelay,
type: 'interval'
});
return this._timerConfig.idToRef(uuid);
}
_fakeSetTimeout(callback, delay, ...args) {
if (this._disposed) {
return null;
} // eslint-disable-next-line no-bitwise
delay = Number(delay) | 0;
const uuid = this._uuidCounter++;
this._timers.set(String(uuid), {
callback: (function(_callback4) {
function callback() {
return _callback4.apply(this, arguments);
}
callback.toString = function() {
return _callback4.toString();
};
return callback;
})(() => callback.apply(null, args)),
expiry: this._now + delay,
interval: undefined,
type: 'timeout'
});
return this._timerConfig.idToRef(uuid);
}
_getNextTimerHandle() {
let nextTimerHandle = null;
let soonestTime = MS_IN_A_YEAR;
this._timers.forEach((timer, uuid) => {
if (timer.expiry < soonestTime) {
soonestTime = timer.expiry;
nextTimerHandle = uuid;
}
});
return nextTimerHandle;
}
_runTimerHandle(timerHandle) {
const timer = this._timers.get(timerHandle);
if (!timer) {
return;
}
switch (timer.type) {
case 'timeout':
const callback = timer.callback;
this._timers.delete(timerHandle);
callback();
break;
case 'interval':
timer.expiry = this._now + (timer.interval || 0);
timer.callback();
break;
default:
throw new Error('Unexpected timer type: ' + timer.type);
}
}
}
exports.default = FakeTimers;