'use strict';
/**
 * @license Angular v<unknown>
 * (c) 2010-2024 Google LLC. https://angular.io/
 * License: MIT
 */
const global = (typeof window === 'object' && window) || (typeof self === 'object' && self) || globalThis.global;
const OriginalDate = global.Date;
// Since when we compile this file to `es2015`, and if we define
// this `FakeDate` as `class FakeDate`, and then set `FakeDate.prototype`
// there will be an error which is `Cannot assign to read only property 'prototype'`
// so we need to use function implementation here.
function FakeDate() {
    if (arguments.length === 0) {
        const d = new OriginalDate();
        d.setTime(FakeDate.now());
        return d;
    }
    else {
        const args = Array.prototype.slice.call(arguments);
        return new OriginalDate(...args);
    }
}
FakeDate.now = function () {
    const fakeAsyncTestZoneSpec = Zone.current.get('FakeAsyncTestZoneSpec');
    if (fakeAsyncTestZoneSpec) {
        return fakeAsyncTestZoneSpec.getFakeSystemTime();
    }
    return OriginalDate.now.apply(this, arguments);
};
FakeDate.UTC = OriginalDate.UTC;
FakeDate.parse = OriginalDate.parse;
// keep a reference for zone patched timer function
let patchedTimers;
const timeoutCallback = function () { };
class Scheduler {
    // Next scheduler id.
    static { this.nextNodeJSId = 1; }
    static { this.nextId = -1; }
    constructor() {
        // Scheduler queue with the tuple of end time and callback function - sorted by end time.
        this._schedulerQueue = [];
        // Current simulated time in millis.
        this._currentTickTime = 0;
        // Current fake system base time in millis.
        this._currentFakeBaseSystemTime = OriginalDate.now();
        // track requeuePeriodicTimer
        this._currentTickRequeuePeriodicEntries = [];
    }
    static getNextId() {
        const id = patchedTimers.nativeSetTimeout.call(global, timeoutCallback, 0);
        patchedTimers.nativeClearTimeout.call(global, id);
        if (typeof id === 'number') {
            return id;
        }
        // in NodeJS, we just use a number for fakeAsync, since it will not
        // conflict with native TimeoutId
        return Scheduler.nextNodeJSId++;
    }
    getCurrentTickTime() {
        return this._currentTickTime;
    }
    getFakeSystemTime() {
        return this._currentFakeBaseSystemTime + this._currentTickTime;
    }
    setFakeBaseSystemTime(fakeBaseSystemTime) {
        this._currentFakeBaseSystemTime = fakeBaseSystemTime;
    }
    getRealSystemTime() {
        return OriginalDate.now();
    }
    scheduleFunction(cb, delay, options) {
        options = {
            ...{
                args: [],
                isPeriodic: false,
                isRequestAnimationFrame: false,
                id: -1,
                isRequeuePeriodic: false,
            },
            ...options,
        };
        let currentId = options.id < 0 ? Scheduler.nextId : options.id;
        Scheduler.nextId = Scheduler.getNextId();
        let endTime = this._currentTickTime + delay;
        // Insert so that scheduler queue remains sorted by end time.
        let newEntry = {
            endTime: endTime,
            id: currentId,
            func: cb,
            args: options.args,
            delay: delay,
            isPeriodic: options.isPeriodic,
            isRequestAnimationFrame: options.isRequestAnimationFrame,
        };
        if (options.isRequeuePeriodic) {
            this._currentTickRequeuePeriodicEntries.push(newEntry);
        }
        let i = 0;
        for (; i < this._schedulerQueue.length; i++) {
            let currentEntry = this._schedulerQueue[i];
            if (newEntry.endTime < currentEntry.endTime) {
                break;
            }
        }
        this._schedulerQueue.splice(i, 0, newEntry);
        return currentId;
    }
    removeScheduledFunctionWithId(id) {
        for (let i = 0; i < this._schedulerQueue.length; i++) {
            if (this._schedulerQueue[i].id == id) {
                this._schedulerQueue.splice(i, 1);
                break;
            }
        }
    }
    removeAll() {
        this._schedulerQueue = [];
    }
    getTimerCount() {
        return this._schedulerQueue.length;
    }
    tickToNext(step = 1, doTick, tickOptions) {
        if (this._schedulerQueue.length < step) {
            return;
        }
        // Find the last task currently queued in the scheduler queue and tick
        // till that time.
        const startTime = this._currentTickTime;
        const targetTask = this._schedulerQueue[step - 1];
        this.tick(targetTask.endTime - startTime, doTick, tickOptions);
    }
    tick(millis = 0, doTick, tickOptions) {
        let finalTime = this._currentTickTime + millis;
        let lastCurrentTime = 0;
        tickOptions = Object.assign({ processNewMacroTasksSynchronously: true }, tickOptions);
        // we need to copy the schedulerQueue so nested timeout
        // will not be wrongly called in the current tick
        // https://github.com/angular/angular/issues/33799
        const schedulerQueue = tickOptions.processNewMacroTasksSynchronously
            ? this._schedulerQueue
            : this._schedulerQueue.slice();
        if (schedulerQueue.length === 0 && doTick) {
            doTick(millis);
            return;
        }
        while (schedulerQueue.length > 0) {
            // clear requeueEntries before each loop
            this._currentTickRequeuePeriodicEntries = [];
            let current = schedulerQueue[0];
            if (finalTime < current.endTime) {
                // Done processing the queue since it's sorted by endTime.
                break;
            }
            else {
                // Time to run scheduled function. Remove it from the head of queue.
                let current = schedulerQueue.shift();
                if (!tickOptions.processNewMacroTasksSynchronously) {
                    const idx = this._schedulerQueue.indexOf(current);
                    if (idx >= 0) {
                        this._schedulerQueue.splice(idx, 1);
                    }
                }
                lastCurrentTime = this._currentTickTime;
                this._currentTickTime = current.endTime;
                if (doTick) {
                    doTick(this._currentTickTime - lastCurrentTime);
                }
                let retval = current.func.apply(global, current.isRequestAnimationFrame ? [this._currentTickTime] : current.args);
                if (!retval) {
                    // Uncaught exception in the current scheduled function. Stop processing the queue.
                    break;
                }
                // check is there any requeue periodic entry is added in
                // current loop, if there is, we need to add to current loop
                if (!tickOptions.processNewMacroTasksSynchronously) {
                    this._currentTickRequeuePeriodicEntries.forEach((newEntry) => {
                        let i = 0;
                        for (; i < schedulerQueue.length; i++) {
                            const currentEntry = schedulerQueue[i];
                            if (newEntry.endTime < currentEntry.endTime) {
                                break;
                            }
                        }
                        schedulerQueue.splice(i, 0, newEntry);
                    });
                }
            }
        }
        lastCurrentTime = this._currentTickTime;
        this._currentTickTime = finalTime;
        if (doTick) {
            doTick(this._currentTickTime - lastCurrentTime);
        }
    }
    flushOnlyPendingTimers(doTick) {
        if (this._schedulerQueue.length === 0) {
            return 0;
        }
        // Find the last task currently queued in the scheduler queue and tick
        // till that time.
        const startTime = this._currentTickTime;
        const lastTask = this._schedulerQueue[this._schedulerQueue.length - 1];
        this.tick(lastTask.endTime - startTime, doTick, { processNewMacroTasksSynchronously: false });
        return this._currentTickTime - startTime;
    }
    flush(limit = 20, flushPeriodic = false, doTick) {
        if (flushPeriodic) {
            return this.flushPeriodic(doTick);
        }
        else {
            return this.flushNonPeriodic(limit, doTick);
        }
    }
    flushPeriodic(doTick) {
        if (this._schedulerQueue.length === 0) {
            return 0;
        }
        // Find the last task currently queued in the scheduler queue and tick
        // till that time.
        const startTime = this._currentTickTime;
        const lastTask = this._schedulerQueue[this._schedulerQueue.length - 1];
        this.tick(lastTask.endTime - startTime, doTick);
        return this._currentTickTime - startTime;
    }
    flushNonPeriodic(limit, doTick) {
        const startTime = this._currentTickTime;
        let lastCurrentTime = 0;
        let count = 0;
        while (this._schedulerQueue.length > 0) {
            count++;
            if (count > limit) {
                throw new Error('flush failed after reaching the limit of ' +
                    limit +
                    ' tasks. Does your code use a polling timeout?');
            }
            // flush only non-periodic timers.
            // If the only remaining tasks are periodic(or requestAnimationFrame), finish flushing.
            if (this._schedulerQueue.filter((task) => !task.isPeriodic && !task.isRequestAnimationFrame)
                .length === 0) {
                break;
            }
            const current = this._schedulerQueue.shift();
            lastCurrentTime = this._currentTickTime;
            this._currentTickTime = current.endTime;
            if (doTick) {
                // Update any secondary schedulers like Jasmine mock Date.
                doTick(this._currentTickTime - lastCurrentTime);
            }
            const retval = current.func.apply(global, current.args);
            if (!retval) {
                // Uncaught exception in the current scheduled function. Stop processing the queue.
                break;
            }
        }
        return this._currentTickTime - startTime;
    }
}
class FakeAsyncTestZoneSpec {
    static assertInZone() {
        if (Zone.current.get('FakeAsyncTestZoneSpec') == null) {
            throw new Error('The code should be running in the fakeAsync zone to call this function');
        }
    }
    constructor(namePrefix, trackPendingRequestAnimationFrame = false, macroTaskOptions) {
        this.trackPendingRequestAnimationFrame = trackPendingRequestAnimationFrame;
        this.macroTaskOptions = macroTaskOptions;
        this._scheduler = new Scheduler();
        this._microtasks = [];
        this._lastError = null;
        this._uncaughtPromiseErrors = Promise[Zone.__symbol__('uncaughtPromiseErrors')];
        this.pendingPeriodicTimers = [];
        this.pendingTimers = [];
        this.patchDateLocked = false;
        this.properties = { 'FakeAsyncTestZoneSpec': this };
        this.name = 'fakeAsyncTestZone for ' + namePrefix;
        // in case user can't access the construction of FakeAsyncTestSpec
        // user can also define macroTaskOptions by define a global variable.
        if (!this.macroTaskOptions) {
            this.macroTaskOptions = global[Zone.__symbol__('FakeAsyncTestMacroTask')];
        }
    }
    _fnAndFlush(fn, completers) {
        return (...args) => {
            fn.apply(global, args);
            if (this._lastError === null) {
                // Success
                if (completers.onSuccess != null) {
                    completers.onSuccess.apply(global);
                }
                // Flush microtasks only on success.
                this.flushMicrotasks();
            }
            else {
                // Failure
                if (completers.onError != null) {
                    completers.onError.apply(global);
                }
            }
            // Return true if there were no errors, false otherwise.
            return this._lastError === null;
        };
    }
    static _removeTimer(timers, id) {
        let index = timers.indexOf(id);
        if (index > -1) {
            timers.splice(index, 1);
        }
    }
    _dequeueTimer(id) {
        return () => {
            FakeAsyncTestZoneSpec._removeTimer(this.pendingTimers, id);
        };
    }
    _requeuePeriodicTimer(fn, interval, args, id) {
        return () => {
            // Requeue the timer callback if it's not been canceled.
            if (this.pendingPeriodicTimers.indexOf(id) !== -1) {
                this._scheduler.scheduleFunction(fn, interval, {
                    args,
                    isPeriodic: true,
                    id,
                    isRequeuePeriodic: true,
                });
            }
        };
    }
    _dequeuePeriodicTimer(id) {
        return () => {
            FakeAsyncTestZoneSpec._removeTimer(this.pendingPeriodicTimers, id);
        };
    }
    _setTimeout(fn, delay, args, isTimer = true) {
        let removeTimerFn = this._dequeueTimer(Scheduler.nextId);
        // Queue the callback and dequeue the timer on success and error.
        let cb = this._fnAndFlush(fn, { onSuccess: removeTimerFn, onError: removeTimerFn });
        let id = this._scheduler.scheduleFunction(cb, delay, { args, isRequestAnimationFrame: !isTimer });
        if (isTimer) {
            this.pendingTimers.push(id);
        }
        return id;
    }
    _clearTimeout(id) {
        FakeAsyncTestZoneSpec._removeTimer(this.pendingTimers, id);
        this._scheduler.removeScheduledFunctionWithId(id);
    }
    _setInterval(fn, interval, args) {
        let id = Scheduler.nextId;
        let completers = { onSuccess: null, onError: this._dequeuePeriodicTimer(id) };
        let cb = this._fnAndFlush(fn, completers);
        // Use the callback created above to requeue on success.
        completers.onSuccess = this._requeuePeriodicTimer(cb, interval, args, id);
        // Queue the callback and dequeue the periodic timer only on error.
        this._scheduler.scheduleFunction(cb, interval, { args, isPeriodic: true });
        this.pendingPeriodicTimers.push(id);
        return id;
    }
    _clearInterval(id) {
        FakeAsyncTestZoneSpec._removeTimer(this.pendingPeriodicTimers, id);
        this._scheduler.removeScheduledFunctionWithId(id);
    }
    _resetLastErrorAndThrow() {
        let error = this._lastError || this._uncaughtPromiseErrors[0];
        this._uncaughtPromiseErrors.length = 0;
        this._lastError = null;
        throw error;
    }
    getCurrentTickTime() {
        return this._scheduler.getCurrentTickTime();
    }
    getFakeSystemTime() {
        return this._scheduler.getFakeSystemTime();
    }
    setFakeBaseSystemTime(realTime) {
        this._scheduler.setFakeBaseSystemTime(realTime);
    }
    getRealSystemTime() {
        return this._scheduler.getRealSystemTime();
    }
    static patchDate() {
        if (!!global[Zone.__symbol__('disableDatePatching')]) {
            // we don't want to patch global Date
            // because in some case, global Date
            // is already being patched, we need to provide
            // an option to let user still use their
            // own version of Date.
            return;
        }
        if (global['Date'] === FakeDate) {
            // already patched
            return;
        }
        global['Date'] = FakeDate;
        FakeDate.prototype = OriginalDate.prototype;
        // try check and reset timers
        // because jasmine.clock().install() may
        // have replaced the global timer
        FakeAsyncTestZoneSpec.checkTimerPatch();
    }
    static resetDate() {
        if (global['Date'] === FakeDate) {
            global['Date'] = OriginalDate;
        }
    }
    static checkTimerPatch() {
        if (!patchedTimers) {
            throw new Error('Expected timers to have been patched.');
        }
        if (global.setTimeout !== patchedTimers.setTimeout) {
            global.setTimeout = patchedTimers.setTimeout;
            global.clearTimeout = patchedTimers.clearTimeout;
        }
        if (global.setInterval !== patchedTimers.setInterval) {
            global.setInterval = patchedTimers.setInterval;
            global.clearInterval = patchedTimers.clearInterval;
        }
    }
    lockDatePatch() {
        this.patchDateLocked = true;
        FakeAsyncTestZoneSpec.patchDate();
    }
    unlockDatePatch() {
        this.patchDateLocked = false;
        FakeAsyncTestZoneSpec.resetDate();
    }
    tickToNext(steps = 1, doTick, tickOptions = { processNewMacroTasksSynchronously: true }) {
        if (steps <= 0) {
            return;
        }
        FakeAsyncTestZoneSpec.assertInZone();
        this.flushMicrotasks();
        this._scheduler.tickToNext(steps, doTick, tickOptions);
        if (this._lastError !== null) {
            this._resetLastErrorAndThrow();
        }
    }
    tick(millis = 0, doTick, tickOptions = { processNewMacroTasksSynchronously: true }) {
        FakeAsyncTestZoneSpec.assertInZone();
        this.flushMicrotasks();
        this._scheduler.tick(millis, doTick, tickOptions);
        if (this._lastError !== null) {
            this._resetLastErrorAndThrow();
        }
    }
    flushMicrotasks() {
        FakeAsyncTestZoneSpec.assertInZone();
        const flushErrors = () => {
            if (this._lastError !== null || this._uncaughtPromiseErrors.length) {
                // If there is an error stop processing the microtask queue and rethrow the error.
                this._resetLastErrorAndThrow();
            }
        };
        while (this._microtasks.length > 0) {
            let microtask = this._microtasks.shift();
            microtask.func.apply(microtask.target, microtask.args);
        }
        flushErrors();
    }
    flush(limit, flushPeriodic, doTick) {
        FakeAsyncTestZoneSpec.assertInZone();
        this.flushMicrotasks();
        const elapsed = this._scheduler.flush(limit, flushPeriodic, doTick);
        if (this._lastError !== null) {
            this._resetLastErrorAndThrow();
        }
        return elapsed;
    }
    flushOnlyPendingTimers(doTick) {
        FakeAsyncTestZoneSpec.assertInZone();
        this.flushMicrotasks();
        const elapsed = this._scheduler.flushOnlyPendingTimers(doTick);
        if (this._lastError !== null) {
            this._resetLastErrorAndThrow();
        }
        return elapsed;
    }
    removeAllTimers() {
        FakeAsyncTestZoneSpec.assertInZone();
        this._scheduler.removeAll();
        this.pendingPeriodicTimers = [];
        this.pendingTimers = [];
    }
    getTimerCount() {
        return this._scheduler.getTimerCount() + this._microtasks.length;
    }
    onScheduleTask(delegate, current, target, task) {
        switch (task.type) {
            case 'microTask':
                let args = task.data && task.data.args;
                // should pass additional arguments to callback if have any
                // currently we know process.nextTick will have such additional
                // arguments
                let additionalArgs;
                if (args) {
                    let callbackIndex = task.data.cbIdx;
                    if (typeof args.length === 'number' && args.length > callbackIndex + 1) {
                        additionalArgs = Array.prototype.slice.call(args, callbackIndex + 1);
                    }
                }
                this._microtasks.push({
                    func: task.invoke,
                    args: additionalArgs,
                    target: task.data && task.data.target,
                });
                break;
            case 'macroTask':
                switch (task.source) {
                    case 'setTimeout':
                        task.data['handleId'] = this._setTimeout(task.invoke, task.data['delay'], Array.prototype.slice.call(task.data['args'], 2));
                        break;
                    case 'setImmediate':
                        task.data['handleId'] = this._setTimeout(task.invoke, 0, Array.prototype.slice.call(task.data['args'], 1));
                        break;
                    case 'setInterval':
                        task.data['handleId'] = this._setInterval(task.invoke, task.data['delay'], Array.prototype.slice.call(task.data['args'], 2));
                        break;
                    case 'XMLHttpRequest.send':
                        throw new Error('Cannot make XHRs from within a fake async test. Request URL: ' +
                            task.data['url']);
                    case 'requestAnimationFrame':
                    case 'webkitRequestAnimationFrame':
                    case 'mozRequestAnimationFrame':
                        // Simulate a requestAnimationFrame by using a setTimeout with 16 ms.
                        // (60 frames per second)
                        task.data['handleId'] = this._setTimeout(task.invoke, 16, task.data['args'], this.trackPendingRequestAnimationFrame);
                        break;
                    default:
                        // user can define which macroTask they want to support by passing
                        // macroTaskOptions
                        const macroTaskOption = this.findMacroTaskOption(task);
                        if (macroTaskOption) {
                            const args = task.data && task.data['args'];
                            const delay = args && args.length > 1 ? args[1] : 0;
                            let callbackArgs = macroTaskOption.callbackArgs ? macroTaskOption.callbackArgs : args;
                            if (!!macroTaskOption.isPeriodic) {
                                // periodic macroTask, use setInterval to simulate
                                task.data['handleId'] = this._setInterval(task.invoke, delay, callbackArgs);
                                task.data.isPeriodic = true;
                            }
                            else {
                                // not periodic, use setTimeout to simulate
                                task.data['handleId'] = this._setTimeout(task.invoke, delay, callbackArgs);
                            }
                            break;
                        }
                        throw new Error('Unknown macroTask scheduled in fake async test: ' + task.source);
                }
                break;
            case 'eventTask':
                task = delegate.scheduleTask(target, task);
                break;
        }
        return task;
    }
    onCancelTask(delegate, current, target, task) {
        switch (task.source) {
            case 'setTimeout':
            case 'requestAnimationFrame':
            case 'webkitRequestAnimationFrame':
            case 'mozRequestAnimationFrame':
                return this._clearTimeout(task.data['handleId']);
            case 'setInterval':
                return this._clearInterval(task.data['handleId']);
            default:
                // user can define which macroTask they want to support by passing
                // macroTaskOptions
                const macroTaskOption = this.findMacroTaskOption(task);
                if (macroTaskOption) {
                    const handleId = task.data['handleId'];
                    return macroTaskOption.isPeriodic
                        ? this._clearInterval(handleId)
                        : this._clearTimeout(handleId);
                }
                return delegate.cancelTask(target, task);
        }
    }
    onInvoke(delegate, current, target, callback, applyThis, applyArgs, source) {
        try {
            FakeAsyncTestZoneSpec.patchDate();
            return delegate.invoke(target, callback, applyThis, applyArgs, source);
        }
        finally {
            if (!this.patchDateLocked) {
                FakeAsyncTestZoneSpec.resetDate();
            }
        }
    }
    findMacroTaskOption(task) {
        if (!this.macroTaskOptions) {
            return null;
        }
        for (let i = 0; i < this.macroTaskOptions.length; i++) {
            const macroTaskOption = this.macroTaskOptions[i];
            if (macroTaskOption.source === task.source) {
                return macroTaskOption;
            }
        }
        return null;
    }
    onHandleError(parentZoneDelegate, currentZone, targetZone, error) {
        this._lastError = error;
        return false; // Don't propagate error to parent zone.
    }
}
let _fakeAsyncTestZoneSpec = null;
function getProxyZoneSpec() {
    return Zone && Zone['ProxyZoneSpec'];
}
/**
 * Clears out the shared fake async zone for a test.
 * To be called in a global `beforeEach`.
 *
 * @experimental
 */
function resetFakeAsyncZone() {
    if (_fakeAsyncTestZoneSpec) {
        _fakeAsyncTestZoneSpec.unlockDatePatch();
    }
    _fakeAsyncTestZoneSpec = null;
    // in node.js testing we may not have ProxyZoneSpec in which case there is nothing to reset.
    getProxyZoneSpec() && getProxyZoneSpec().assertPresent().resetDelegate();
}
/**
 * Wraps a function to be executed in the fakeAsync zone:
 * - microtasks are manually executed by calling `flushMicrotasks()`,
 * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
 *
 * If there are any pending timers at the end of the function, an exception will be thrown.
 *
 * Can be used to wrap inject() calls.
 *
 * ## Example
 *
 * {@example core/testing/ts/fake_async.ts region='basic'}
 *
 * @param fn
 * @returns The function wrapped to be executed in the fakeAsync zone
 *
 * @experimental
 */
function fakeAsync(fn) {
    // Not using an arrow function to preserve context passed from call site
    const fakeAsyncFn = function (...args) {
        const ProxyZoneSpec = getProxyZoneSpec();
        if (!ProxyZoneSpec) {
            throw new Error('ProxyZoneSpec is needed for the async() test helper but could not be found. ' +
                'Please make sure that your environment includes zone.js/plugins/proxy');
        }
        const proxyZoneSpec = ProxyZoneSpec.assertPresent();
        if (Zone.current.get('FakeAsyncTestZoneSpec')) {
            throw new Error('fakeAsync() calls can not be nested');
        }
        try {
            // in case jasmine.clock init a fakeAsyncTestZoneSpec
            if (!_fakeAsyncTestZoneSpec) {
                const FakeAsyncTestZoneSpec = Zone && Zone['FakeAsyncTestZoneSpec'];
                if (proxyZoneSpec.getDelegate() instanceof FakeAsyncTestZoneSpec) {
                    throw new Error('fakeAsync() calls can not be nested');
                }
                _fakeAsyncTestZoneSpec = new FakeAsyncTestZoneSpec();
            }
            let res;
            const lastProxyZoneSpec = proxyZoneSpec.getDelegate();
            proxyZoneSpec.setDelegate(_fakeAsyncTestZoneSpec);
            _fakeAsyncTestZoneSpec.lockDatePatch();
            try {
                res = fn.apply(this, args);
                flushMicrotasks();
            }
            finally {
                proxyZoneSpec.setDelegate(lastProxyZoneSpec);
            }
            if (_fakeAsyncTestZoneSpec.pendingPeriodicTimers.length > 0) {
                throw new Error(`${_fakeAsyncTestZoneSpec.pendingPeriodicTimers.length} ` +
                    `periodic timer(s) still in the queue.`);
            }
            if (_fakeAsyncTestZoneSpec.pendingTimers.length > 0) {
                throw new Error(`${_fakeAsyncTestZoneSpec.pendingTimers.length} timer(s) still in the queue.`);
            }
            return res;
        }
        finally {
            resetFakeAsyncZone();
        }
    };
    fakeAsyncFn.isFakeAsync = true;
    return fakeAsyncFn;
}
function _getFakeAsyncZoneSpec() {
    if (_fakeAsyncTestZoneSpec == null) {
        _fakeAsyncTestZoneSpec = Zone.current.get('FakeAsyncTestZoneSpec');
        if (_fakeAsyncTestZoneSpec == null) {
            throw new Error('The code should be running in the fakeAsync zone to call this function');
        }
    }
    return _fakeAsyncTestZoneSpec;
}
/**
 * Simulates the asynchronous passage of time for the timers in the fakeAsync zone.
 *
 * The microtasks queue is drained at the very start of this function and after any timer
 * callback has been executed.
 *
 * ## Example
 *
 * {@example core/testing/ts/fake_async.ts region='basic'}
 *
 * @experimental
 */
function tick(millis = 0, ignoreNestedTimeout = false) {
    _getFakeAsyncZoneSpec().tick(millis, null, ignoreNestedTimeout);
}
/**
 * Simulates the asynchronous passage of time for the timers in the fakeAsync zone by
 * draining the macrotask queue until it is empty. The returned value is the milliseconds
 * of time that would have been elapsed.
 *
 * @param maxTurns
 * @returns The simulated time elapsed, in millis.
 *
 * @experimental
 */
function flush(maxTurns) {
    return _getFakeAsyncZoneSpec().flush(maxTurns);
}
/**
 * Discard all remaining periodic tasks.
 *
 * @experimental
 */
function discardPeriodicTasks() {
    const zoneSpec = _getFakeAsyncZoneSpec();
    zoneSpec.pendingPeriodicTimers;
    zoneSpec.pendingPeriodicTimers.length = 0;
}
/**
 * Flush any pending microtasks.
 *
 * @experimental
 */
function flushMicrotasks() {
    _getFakeAsyncZoneSpec().flushMicrotasks();
}
function patchFakeAsyncTest(Zone) {
    // Export the class so that new instances can be created with proper
    // constructor params.
    Zone['FakeAsyncTestZoneSpec'] = FakeAsyncTestZoneSpec;
    Zone.__load_patch('fakeasync', (global, Zone, api) => {
        Zone[api.symbol('fakeAsyncTest')] = {
            resetFakeAsyncZone,
            flushMicrotasks,
            discardPeriodicTasks,
            tick,
            flush,
            fakeAsync,
        };
    }, true);
    patchedTimers = {
        setTimeout: global.setTimeout,
        setInterval: global.setInterval,
        clearTimeout: global.clearTimeout,
        clearInterval: global.clearInterval,
        nativeSetTimeout: global[Zone.__symbol__('setTimeout')],
        nativeClearTimeout: global[Zone.__symbol__('clearTimeout')],
    };
    Scheduler.nextId = Scheduler.getNextId();
}

patchFakeAsyncTest(Zone);