How to use SchedulerArbitrary method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

SchedulerArbitrary.spec.ts

Source:SchedulerArbitrary.spec.ts

...20      const fakeScheduler = {} as SchedulerImplemMock.SchedulerImplem<unknown>;21      const SchedulerImplem = jest.spyOn(SchedulerImplemMock, 'SchedulerImplem');22      SchedulerImplem.mockReturnValue(fakeScheduler);23      // Act24      const arb = new SchedulerArbitrary(act);25      const g = arb.generate(mrng, undefined);26      // Assert27      expect(g.value).toBe(fakeScheduler);28      expect(SchedulerImplem).toHaveBeenCalledTimes(1);29      expect(SchedulerImplem).toHaveBeenCalledWith(30        act,31        expect.objectContaining({ clone: expect.any(Function), nextTaskIndex: expect.any(Function) })32      );33      expect(clone).toHaveBeenCalledTimes(1);34      expect(clone1).toHaveBeenCalledTimes(1);35    });36    it('should build a taskScheduler pulling random values out of the cloned instance of Random', () => {37      // Arrange38      const act = jest.fn();39      const scheduledTasks = [{}, {}, {}, {}, {}, {}, {}, {}] as ScheduledTask<unknown>[];40      const { instance: mrng, clone } = fakeRandom();41      const { instance: mrng1, clone: clone1, nextInt } = fakeRandom();42      const { instance: mrng2 } = fakeRandom();43      clone.mockReturnValueOnce(mrng1);44      clone1.mockReturnValueOnce(mrng2);45      const fakeScheduler = {} as SchedulerImplemMock.SchedulerImplem<unknown>;46      const SchedulerImplem = jest.spyOn(SchedulerImplemMock, 'SchedulerImplem');47      SchedulerImplem.mockReturnValue(fakeScheduler);48      const arb = new SchedulerArbitrary(act);49      arb.generate(mrng, undefined);50      // Act51      const taskScheduler = SchedulerImplem.mock.calls[0][1];52      taskScheduler.nextTaskIndex(scheduledTasks);53      // Assert54      expect(nextInt).toHaveBeenCalledTimes(1);55      expect(nextInt).toHaveBeenCalledWith(0, scheduledTasks.length - 1);56    });57    it('should build a taskScheduler that can be cloned and create the same values', () => {58      // Arrange59      const act = jest.fn();60      const scheduledTasks = [{}, {}, {}, {}, {}, {}, {}, {}] as ScheduledTask<unknown>[];61      const { instance: mrng, clone } = fakeRandom();62      const { instance: mrng1, clone: clone1, nextInt } = fakeRandom();63      const { instance: mrng2, clone: clone2, nextInt: nextIntBis } = fakeRandom();64      const { instance: mrng3 } = fakeRandom();65      clone.mockReturnValueOnce(mrng1);66      clone1.mockImplementationOnce(() => {67        expect(nextInt).not.toHaveBeenCalled(); // if we pulled values clone is not a clone of the source68        return mrng2;69      });70      clone2.mockImplementationOnce(() => {71        expect(nextIntBis).not.toHaveBeenCalled(); // if we pulled values clone is not a clone of the source72        return mrng3;73      });74      nextInt.mockReturnValueOnce(5).mockReturnValueOnce(2);75      nextIntBis.mockReturnValueOnce(5).mockReturnValueOnce(2);76      const fakeScheduler = {} as SchedulerImplemMock.SchedulerImplem<unknown>;77      const SchedulerImplem = jest.spyOn(SchedulerImplemMock, 'SchedulerImplem');78      SchedulerImplem.mockReturnValue(fakeScheduler);79      const arb = new SchedulerArbitrary(act);80      arb.generate(mrng, undefined);81      // Act82      const taskScheduler = SchedulerImplem.mock.calls[0][1];83      const v1 = taskScheduler.nextTaskIndex(scheduledTasks);84      const v2 = taskScheduler.nextTaskIndex(scheduledTasks);85      const taskScheduler2 = taskScheduler.clone();86      const u1 = taskScheduler2.nextTaskIndex(scheduledTasks);87      const u2 = taskScheduler2.nextTaskIndex(scheduledTasks);88      // Assert89      expect(nextInt).toHaveBeenCalledTimes(2);90      expect(nextInt).toHaveBeenCalledWith(0, scheduledTasks.length - 1);91      expect(nextIntBis).toHaveBeenCalledTimes(2);92      expect(nextIntBis).toHaveBeenCalledWith(0, scheduledTasks.length - 1);93      expect(v1).toBe(u1);94      expect(v2).toBe(u2);95    });96  });97  describe('canShrinkWithoutContext', () => {98    it('should return false for any Scheduler received without any context (even for SchedulerImplem)', () => {99      // Arrange100      const act = jest.fn();101      // Act102      const arb = new SchedulerArbitrary(act);103      const out = arb.canShrinkWithoutContext(104        new SchedulerImplemMock.SchedulerImplem(act, { clone: jest.fn(), nextTaskIndex: jest.fn() })105      );106      // Assert107      expect(out).toBe(false);108    });109    it('should return false even for its own values', () => {110      // Arrange111      const act = jest.fn();112      const { instance: mrng, clone } = fakeRandom();113      const { instance: mrng1, clone: clone1 } = fakeRandom();114      const { instance: mrng2 } = fakeRandom();115      clone.mockReturnValueOnce(mrng1);116      clone1.mockReturnValueOnce(mrng2);117      // Act118      const arb = new SchedulerArbitrary(act);119      const g = arb.generate(mrng, undefined);120      const out = arb.canShrinkWithoutContext(g.value);121      // Assert122      expect(out).toBe(false);123    });124  });125  describe('shrink', () => {126    it('should always shrink to nil', () => {127      // Arrange128      const act = jest.fn();129      const { instance: mrng, clone } = fakeRandom();130      const { instance: mrng1, clone: clone1 } = fakeRandom();131      const { instance: mrng2 } = fakeRandom();132      clone.mockReturnValueOnce(mrng1);133      clone1.mockReturnValueOnce(mrng2);134      // Act135      const arb = new SchedulerArbitrary(act);136      const { value, context } = arb.generate(mrng, undefined);137      const shrinks = [...arb.shrink(value, context)];138      // Assert139      expect(shrinks).toHaveLength(0);140    });141  });...

scheduler.spec.ts

Source:scheduler.spec.ts

1import { scheduler, Scheduler, schedulerFor } from '../../../src/arbitrary/scheduler';2import { fakeArbitrary } from './__test-helpers__/ArbitraryHelpers';3import * as BuildSchedulerForMock from '../../../src/arbitrary/_internals/helpers/BuildSchedulerFor';4import * as SchedulerArbitraryMock from '../../../src/arbitrary/_internals/SchedulerArbitrary';5function beforeEachHook() {6  jest.resetModules();7  jest.restoreAllMocks();8}9beforeEach(beforeEachHook);10describe('scheduler', () => {11  it('should instantiate a SchedulerArbitrary with defaulted act (if not provided)', () => {12    // Arrange13    const { instance } = fakeArbitrary<Scheduler<unknown>>();14    const SchedulerArbitrary = jest.spyOn(SchedulerArbitraryMock, 'SchedulerArbitrary');15    SchedulerArbitrary.mockReturnValue(instance as SchedulerArbitraryMock.SchedulerArbitrary<unknown>);16    // Act17    const s = scheduler();18    // Assert19    expect(s).toBe(instance);20    expect(SchedulerArbitrary).toHaveBeenCalledWith(expect.any(Function));21  });22  it('should pass a defaulted act that calls the received function', () => {23    // Arrange24    const { instance } = fakeArbitrary<Scheduler<unknown>>();25    const SchedulerArbitrary = jest.spyOn(SchedulerArbitraryMock, 'SchedulerArbitrary');26    SchedulerArbitrary.mockReturnValue(instance as SchedulerArbitraryMock.SchedulerArbitrary<unknown>);27    const outF = new Promise<unknown>(() => {});28    const f = jest.fn().mockReturnValue(outF);29    // Act30    scheduler();31    const receivedAct = SchedulerArbitrary.mock.calls[0][0];32    const out = receivedAct(f);33    // Assert34    expect(f).toHaveBeenCalledTimes(1);35    expect(out).toBe(outF);36  });37  it('should instantiate a SchedulerArbitrary with received act', () => {38    // Arrange39    const { instance } = fakeArbitrary<Scheduler<unknown>>();40    const SchedulerArbitrary = jest.spyOn(SchedulerArbitraryMock, 'SchedulerArbitrary');41    SchedulerArbitrary.mockReturnValue(instance as SchedulerArbitraryMock.SchedulerArbitrary<unknown>);42    const act = () => Promise.resolve();43    // Act44    const s = scheduler({ act });45    // Assert46    expect(s).toBe(instance);47    expect(SchedulerArbitrary).toHaveBeenCalledWith(act);48  });49});50describe('schedulerFor', () => {51  it('should build proper scheduler when using template string from error logs', async () => {52    // Arrange53    const instance = {} as Scheduler<unknown>;54    const buildSchedulerFor = jest.spyOn(BuildSchedulerForMock, 'buildSchedulerFor');55    buildSchedulerFor.mockReturnValue(instance);56    // Act57    const s = schedulerFor()`58      -> [task${3}] promise rejected with value "pz"59      -> [task${1}] promise resolved with value "px"60      -> [task${2}] promise rejected with value "py"`;61    // Assert62    expect(s).toBe(instance);63    expect(buildSchedulerFor).toHaveBeenCalledWith(expect.any(Function), [3, 1, 2]);64  });65  it('should build proper scheduler when using custom template string', async () => {66    // Arrange67    const instance = {} as Scheduler<unknown>;68    const buildSchedulerFor = jest.spyOn(BuildSchedulerForMock, 'buildSchedulerFor');69    buildSchedulerFor.mockReturnValue(instance);70    // Act71    const s = schedulerFor()`72        This scheduler will resolve task ${2} first73        followed by ${3} and only then task ${1}`;74    // Assert75    expect(s).toBe(instance);76    expect(buildSchedulerFor).toHaveBeenCalledWith(expect.any(Function), [2, 3, 1]);77  });78  it('should build proper scheduler when using ordering array', async () => {79    // Arrange80    const instance = {} as Scheduler<unknown>;81    const buildSchedulerFor = jest.spyOn(BuildSchedulerForMock, 'buildSchedulerFor');82    buildSchedulerFor.mockReturnValue(instance);83    // Act84    const s = schedulerFor([2, 3, 1]);85    // Assert86    expect(s).toBe(instance);87    expect(buildSchedulerFor).toHaveBeenCalledWith(expect.any(Function), [2, 3, 1]);88  });...

scheduler.ts

Source:scheduler.ts

1import { Arbitrary } from '../check/arbitrary/definition/Arbitrary';2import { Scheduler } from './_internals/interfaces/Scheduler';3import { buildSchedulerFor } from './_internals/helpers/BuildSchedulerFor';4import { SchedulerArbitrary } from './_internals/SchedulerArbitrary';5export { Scheduler, SchedulerReportItem, SchedulerSequenceItem } from './_internals/interfaces/Scheduler';6/**7 * Constraints to be applied on {@link scheduler}8 * @remarks Since 2.2.09 * @public10 */11export interface SchedulerConstraints {12  /**13   * Ensure that all scheduled tasks will be executed in the right context (for instance it can be the `act` of React)14   * @remarks Since 1.21.015   */16  act: (f: () => Promise<void>) => Promise<unknown>;17}18/**19 * For scheduler of promises20 * @remarks Since 1.20.021 * @public22 */23export function scheduler<TMetaData = unknown>(constraints?: SchedulerConstraints): Arbitrary<Scheduler<TMetaData>> {24  const { act = (f: () => Promise<void>) => f() } = constraints || {};25  return new SchedulerArbitrary<TMetaData>(act);26}27/**28 * For custom scheduler with predefined resolution order29 *30 * Ordering is defined by using a template string like the one generated in case of failure of a {@link scheduler}31 *32 * It may be something like:33 *34 * @example35 * ```typescript36 * fc.schedulerFor()`37 *   -> [task\${2}] promise pending38 *   -> [task\${3}] promise pending39 *   -> [task\${1}] promise pending40 * `41 * ```42 *43 * Or more generally:44 * ```typescript45 * fc.schedulerFor()`46 *   This scheduler will resolve task ${2} first47 *   followed by ${3} and only then task ${1}48 * `49 * ```50 *51 * WARNING:52 * Custom scheduler will53 * neither check that all the referred promises have been scheduled54 * nor that they resolved with the same status and value.55 *56 *57 * WARNING:58 * If one the promises is wrongly defined it will fail - for instance asking to resolve 5 while 5 does not exist.59 *60 * @remarks Since 1.25.061 * @public62 */63function schedulerFor<TMetaData = unknown>(64  constraints?: SchedulerConstraints65): (_strs: TemplateStringsArray, ...ordering: number[]) => Scheduler<TMetaData>;66/**67 * For custom scheduler with predefined resolution order68 *69 * WARNING:70 * Custom scheduler will not check that all the referred promises have been scheduled.71 *72 *73 * WARNING:74 * If one the promises is wrongly defined it will fail - for instance asking to resolve 5 while 5 does not exist.75 *76 * @param customOrdering - Array defining in which order the promises will be resolved.77 * Id of the promises start at 1. 1 means first scheduled promise, 2 second scheduled promise and so on.78 *79 * @remarks Since 1.25.080 * @public81 */82function schedulerFor<TMetaData = unknown>(83  customOrdering: number[],84  constraints?: SchedulerConstraints85): Scheduler<TMetaData>;86function schedulerFor<TMetaData = unknown>(87  customOrderingOrConstraints: number[] | SchedulerConstraints | undefined,88  constraintsOrUndefined?: SchedulerConstraints89): Scheduler<TMetaData> | ((_strs: TemplateStringsArray, ...ordering: number[]) => Scheduler<TMetaData>) {90  // Extract passed constraints91  const { act = (f: () => Promise<void>) => f() } = Array.isArray(customOrderingOrConstraints)92    ? constraintsOrUndefined || {}93    : customOrderingOrConstraints || {};94  if (Array.isArray(customOrderingOrConstraints)) {95    return buildSchedulerFor(act, customOrderingOrConstraints);96  }97  return function (_strs: TemplateStringsArray, ...ordering: number[]) {98    return buildSchedulerFor(act, ordering);99  };100}...

Using AI Code Generation

1const { SchedulerArbitrary } = require('fast-check/lib/arbitrary/scheduler/SchedulerArbitrary');2const { Scheduler } = require('fast-check/lib/arbitrary/scheduler/Scheduler');3const scheduler = SchedulerArbitrary().generate(mrng(0)).value;4console.log(scheduler);5const scheduler2 = new Scheduler();6console.log(scheduler2);7I have a project that uses fast-check, and I want to use the SchedulerArbitrary() method, but I get the following error:8I have imported the SchedulerArbitrary method as shown above, but it still does not work. I have also tried importing it in the following way:9import { SchedulerArbitrary } from 'fast-check/lib/arbitrary/scheduler/SchedulerArbitrary';10I have also tried importing it in the following way:11import { SchedulerArbitrary } from 'fast-check';12I have also tried importing it in the following way:13import { SchedulerArbitrary } from 'fast-check/lib';14I have also tried importing it in the following way:15import { SchedulerArbitrary } from 'fast-check/lib/arbitrary';16I have also tried importing it in the following way:17import { SchedulerArbitrary } from 'fast-check/lib/arbitrary/scheduler';18I have also tried importing it in the following way:19import { SchedulerArbitrary } from 'fast-check/lib/arbitrary/scheduler/Scheduler';20I have also tried importing it in the following way:21import { SchedulerArbitrary } from 'fast-check/lib/arbitrary/scheduler/SchedulerArbitrary';22I have also tried importing it in the following way:23import { SchedulerArbitrary } from 'fast-check/lib/arbitrary/scheduler/SchedulerArbitrary';24I have also tried importing it in the following way:25import { SchedulerArbitrary } from 'fast-check/lib/arbitrary/scheduler

Using AI Code Generation

1const SchedulerArbitrary = require('fast-check/lib/types/scheduler/SchedulerArbitrary').SchedulerArbitrary;2const Scheduler = require('fast-check/lib/types/scheduler/Scheduler').Scheduler;3const { configureGlobal } = require('fast-check/lib/check/runner/configuration/GlobalParameters').configureGlobal;4const scheduler = SchedulerArbitrary().generate(0).value;5const s = new Scheduler(scheduler);6s.schedule(0, () => console.log('first'));7s.schedule(1, () => console.log('second'));8s.schedule(2, () => console.log('third'));9s.flushUntil(2);10s.flushUntil(3);11configureGlobal({ interruptAfterTimeLimit: 1000 });12s.flushAll();

Using AI Code Generation

1const fc = require("fast-check");2const { SchedulerArbitrary } = require("fast-check/lib/types/arbitrary/SchedulerArbitrary");3const fc = require("fast-check");4const { SchedulerArbitrary } = require("fast-check/lib/types/arbitrary/SchedulerArbitrary");5fc.assert(6    fc.property(SchedulerArbitrary(), (scheduler) => {7    })8);9const { SchedulerArbitrary } = require("fast-check/lib/types/arbitrary/SchedulerArbitrary");10const { Scheduler } = require("fast-check/lib/types/Scheduler");11const scheduler = new Scheduler();12fc.assert(13    fc.property(SchedulerArbitrary(), (s) => {14    })15);16fc.assert(17    fc.property(SchedulerArbitrary(), (s) => {18    })19);20fc.assert(21    fc.property(SchedulerArbitrary(), (s) => {22    })23);24fc.assert(25    fc.property(SchedulerArbitrary(), (s) => {26    })27);28fc.assert(29    fc.property(SchedulerArbitrary(), (s) => {30    })31);32fc.assert(33    fc.property(SchedulerArbitrary(), (s) => {34    })35);36fc.assert(37    fc.property(SchedulerArbitrary(), (s) => {38    })39);40fc.assert(41    fc.property(SchedulerArbitrary(), (s) => {42    })43);44fc.assert(45    fc.property(SchedulerArbitrary(), (s) => {46    })47);48fc.assert(49    fc.property(SchedulerArbitrary(), (s) => {

Using AI Code Generation

1import { SchedulerArbitrary } from 'fast-check/lib/esm/check/arbitrary/SchedulerArbitrary.js';2import { scheduler } from 'fast-check/lib/esm/check/arbitrary/SchedulerArbitrary.js';3import { integer } from 'fast-check/lib/esm/check/arbitrary/IntegerArbitrary.js';4import { tuple } from 'fast-check/lib/esm/check/arbitrary/TupleArbitrary.js';5import { constantFrom } from 'fast-check/lib/esm/check/arbitrary/ConstantArbitrary.js';6import { stringOf } from 'fast-check/lib/esm/check/arbitrary/StringArbitrary.js';7import { array } from 'fast-check/lib/esm/check/arbitrary/ArrayArbitrary.js';8import { oneof } from 'fast-check/lib/esm/check/arbitrary/OneOfArbitrary.js';9import { record } from 'fast-check/lib/esm/check/arbitrary/RecordArbitrary.js';10import { set } from 'fast-check/lib/esm/check/arbitrary/SetArbitrary.js';11import { dictionary } from 'fast-check/lib/esm/check/arbitrary/DictionaryArbitrary.js';12import { option } from 'fast-check/lib/esm/check/arbitrary/OptionArbitrary.js';13import { anything } from 'fast-check/lib/esm/check/arbitrary/AnythingArbitrary.js';14import { cloneMethod } from 'fast-check/lib/esm/check/symbols.js';15import { cloneMethod as cloneMethod$1 } from 'fast-check/lib/esm/check/symbols.js';16import { cloneMethod as cloneMethod$2 } from 'fast-check/lib/esm/check/symbols.js';17import { cloneMethod as cloneMethod$3 } from 'fast-check/lib/esm/check/symbols.js';18import { cloneMethod as cloneMethod$4 } from 'fast-check/lib/esm/check/symbols.js';19import { cloneMethod as cloneMethod$5 } from 'fast-check/lib/esm/check/symbols.js';20import { cloneMethod as cloneMethod$6 } from 'fast-check/lib/esm/check/symbols.js';21import { cloneMethod as cloneMethod$7 } from 'fast-check/lib/esm/check/symbols.js';22import { cloneMethod as cloneMethod$8 } from 'fast-check/lib/esm/check/symbols.js';23import { cloneMethod as cloneMethod$9 } from 'fast-check/lib/esm/check/symbols.js';24import { cloneMethod as cloneMethod$10 } from 'fast-check/lib/esm/check/s

Using AI Code Generation

1const { SchedulerArbitrary } = require("fast-check");2const { Scheduler } = require("fast-check/lib/types/scheduler/Scheduler");3const { scheduler } = require("fast-check/lib/types/scheduler/Scheduler");4const { schedulerWithTime } = require("fast-check/lib/types/scheduler/SchedulerWithTime");5const { schedulerWithTimeAndCounters } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCounters");6const { schedulerWithTimeAndCountersAndHooks } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooks");7const { schedulerWithTimeAndCountersAndHooksAndClock } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClock");8const { schedulerWithTimeAndCountersAndHooksAndClockAndState } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndState");9const { schedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandom } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandom");10const { schedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraints } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraints");11const { schedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecorded } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecorded");12const { schedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecordedAndTime } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecordedAndTime");13const { schedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecordedAndTimeAndState } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecordedAndTimeAndState");14const { schedulerWithTimeAndCountersAndHooksAndClockAndStateAndRandomAndConstraintsAndRecordedAndTimeAndStateAndRandom } = require("fast-check/lib/types/scheduler/SchedulerWithTimeAndCountersAndHooksAndClockAndState

Using AI Code Generation

1const SchedulerArbitrary = require('fast-check/lib/arbitrary/SchedulerArbitrary.js');2const fc = require('fast-check');3const { it } = require('mocha');4it('should run', () => {5    fc.assert(6        fc.property(SchedulerArbitrary(), (scheduler) => {7            return true;8        })9    );10});11{12  "scripts": {13  },14  "dependencies": {15  },16  "devDependencies": {17  }18}19const { SchedulerArbitrary } = require('fast-check/lib/arbitrary/SchedulerArbitrary.js');20const fc = require('fast-check');21const { it } = require('mocha');22it('should run', () => {23    fc.assert(24        fc.property(SchedulerArbitrary(), (scheduler) => {25            return true;26        })27    );28});29{30  "scripts": {31  },32  "dependencies": {33  },34  "devDependencies": {35  }36}

Using AI Code Generation

1import { SchedulerArbitrary } from 'fast-check';2const scheduler = SchedulerArbitrary().generate();3scheduler.schedule(() => console.log('hello world'));4{5  "dependencies": {6  }7}

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