Best JavaScript code snippet using fast-check-monorepo
SchedulerImplem.ts
Source:SchedulerImplem.ts  
1import { escapeForTemplateString } from '../helpers/TextEscaper';2import { cloneMethod } from '../../../check/symbols';3import { stringify } from '../../../utils/stringify';4import { Scheduler, SchedulerReportItem, SchedulerSequenceItem } from '../interfaces/Scheduler';5/** @internal */6type TriggeredTask<TMetaData> = {7  status: 'resolved' | 'rejected';8  schedulingType: 'promise' | 'function' | 'sequence';9  taskId: number;10  label: string;11  metadata?: TMetaData;12  outputValue: string | undefined;13};14/** @internal */15export type ScheduledTask<TMetaData> = {16  original: PromiseLike<unknown>;17  scheduled: PromiseLike<unknown>;18  trigger: () => void;19  schedulingType: 'promise' | 'function' | 'sequence';20  taskId: number;21  label: string;22  metadata?: TMetaData;23};24/** @internal */25export type TaskSelector<TMetaData> = {26  clone: () => TaskSelector<TMetaData>;27  nextTaskIndex: (scheduledTasks: ScheduledTask<TMetaData>[]) => number;28};29/** @internal */30export class SchedulerImplem<TMetaData> implements Scheduler<TMetaData> {31  private lastTaskId: number;32  private readonly sourceTaskSelector: TaskSelector<TMetaData>;33  private readonly scheduledTasks: ScheduledTask<TMetaData>[];34  private readonly triggeredTasks: TriggeredTask<TMetaData>[];35  private readonly scheduledWatchers: (() => void)[];36  constructor(37    readonly act: (f: () => Promise<void>) => Promise<unknown>,38    private readonly taskSelector: TaskSelector<TMetaData>39  ) {40    this.lastTaskId = 0;41    this.sourceTaskSelector = taskSelector.clone();42    this.scheduledTasks = [];43    this.triggeredTasks = [];44    this.scheduledWatchers = [];45  }46  private static buildLog<TMetaData>(reportItem: SchedulerReportItem<TMetaData>) {47    return `[task\${${reportItem.taskId}}] ${48      reportItem.label.length !== 0 ? `${reportItem.schedulingType}::${reportItem.label}` : reportItem.schedulingType49    } ${reportItem.status}${50      reportItem.outputValue !== undefined ? ` with value ${escapeForTemplateString(reportItem.outputValue)}` : ''51    }`;52  }53  private log(54    schedulingType: 'promise' | 'function' | 'sequence',55    taskId: number,56    label: string,57    metadata: TMetaData | undefined,58    status: 'resolved' | 'rejected',59    data: unknown60  ) {61    this.triggeredTasks.push({62      status,63      schedulingType,64      taskId,65      label,66      metadata,67      outputValue: data !== undefined ? stringify(data) : undefined,68    });69  }70  private scheduleInternal<T>(71    schedulingType: 'promise' | 'function' | 'sequence',72    label: string,73    task: PromiseLike<T>,74    metadata: TMetaData | undefined,75    thenTaskToBeAwaited?: () => PromiseLike<T>76  ): Promise<T> {77    let trigger: (() => void) | null = null;78    const taskId = ++this.lastTaskId;79    const scheduledPromise = new Promise<T>((resolve, reject) => {80      trigger = () => {81        (thenTaskToBeAwaited ? task.then(() => thenTaskToBeAwaited()) : task).then(82          (data) => {83            this.log(schedulingType, taskId, label, metadata, 'resolved', data);84            return resolve(data);85          },86          (err) => {87            this.log(schedulingType, taskId, label, metadata, 'rejected', err);88            return reject(err);89          }90        );91      };92    });93    this.scheduledTasks.push({94      original: task,95      scheduled: scheduledPromise,96      // `trigger` will always be initialised at this point: body of `new Promise` has already been executed97      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion98      trigger: trigger!,99      schedulingType,100      taskId,101      label,102      metadata,103    });104    if (this.scheduledWatchers.length !== 0) {105      this.scheduledWatchers[0]();106    }107    return scheduledPromise;108  }109  schedule<T>(task: Promise<T>, label?: string, metadata?: TMetaData): Promise<T> {110    return this.scheduleInternal('promise', label || '', task, metadata);111  }112  scheduleFunction<TArgs extends any[], T>(113    asyncFunction: (...args: TArgs) => Promise<T>114  ): (...args: TArgs) => Promise<T> {115    return (...args: TArgs) =>116      this.scheduleInternal(117        'function',118        `${asyncFunction.name}(${args.map(stringify).join(',')})`,119        asyncFunction(...args),120        undefined121      );122  }123  scheduleSequence(sequenceBuilders: SchedulerSequenceItem<TMetaData>[]): {124    done: boolean;125    faulty: boolean;126    task: Promise<{ done: boolean; faulty: boolean }>;127  } {128    // We run all the builders sequencially129    // BUT we allow tasks scheduled outside of this sequence130    //     to be called between two of our builders131    const status = { done: false, faulty: false };132    const dummyResolvedPromise: PromiseLike<any> = { then: (f: () => any) => f() };133    // Placeholder resolver, immediately replaced by the one retrieved in `new Promise`134    // eslint-disable-next-line @typescript-eslint/no-empty-function135    let resolveSequenceTask = () => {};136    const sequenceTask = new Promise<void>((resolve) => (resolveSequenceTask = resolve));137    sequenceBuilders138      .reduce((previouslyScheduled: PromiseLike<any>, item: SchedulerSequenceItem<TMetaData>) => {139        const [builder, label, metadata] =140          typeof item === 'function' ? [item, item.name, undefined] : [item.builder, item.label, item.metadata];141        return previouslyScheduled.then(() => {142          // We schedule a successful promise that will trigger builder directly when triggered143          const scheduled = this.scheduleInternal('sequence', label, dummyResolvedPromise, metadata, () => builder());144          scheduled.catch(() => {145            status.faulty = true;146            resolveSequenceTask();147          });148          return scheduled;149        });150      }, dummyResolvedPromise)151      .then(152        () => {153          status.done = true;154          resolveSequenceTask();155        },156        () => {157          /* Discarding UnhandledPromiseRejectionWarning */158          /* No need to call resolveSequenceTask as it should already have been triggered */159        }160      );161    // TODO Prefer getter instead of sharing the variable itself162    //      Would need to stop supporting <es5163    // return {164    //   get done() { return status.done },165    //   get faulty() { return status.faulty }166    // };167    return Object.assign(status, {168      task: Promise.resolve(sequenceTask).then(() => {169        return { done: status.done, faulty: status.faulty };170      }),171    });172  }173  count(): number {174    return this.scheduledTasks.length;175  }176  private async internalWaitOne() {177    if (this.scheduledTasks.length === 0) {178      throw new Error('No task scheduled');179    }180    const taskIndex = this.taskSelector.nextTaskIndex(this.scheduledTasks);181    const [scheduledTask] = this.scheduledTasks.splice(taskIndex, 1);182    scheduledTask.trigger(); // release the promise183    try {184      await scheduledTask.scheduled; // wait for its completion185    } catch (_err) {186      // We ignore failures here, we just want to wait the promise to be resolved (failure or success)187    }188  }189  async waitOne(): Promise<void> {190    await this.act(async () => await this.internalWaitOne());191  }192  async waitAll(): Promise<void> {193    while (this.scheduledTasks.length > 0) {194      await this.waitOne();195    }196  }197  async waitFor<T>(unscheduledTask: Promise<T>): Promise<T> {198    let taskResolved = false;199    // Define the lazy watchers: triggered whenever something new has been scheduled200    let awaiterPromise: Promise<void> | null = null;201    const awaiter = async () => {202      while (!taskResolved && this.scheduledTasks.length > 0) {203        await this.waitOne();204      }205      awaiterPromise = null;206    };207    const handleNotified = () => {208      if (awaiterPromise !== null) {209        // Awaiter is currently running, there is no need to relaunch it210        return;211      }212      // Schedule the next awaiter (awaiter will reset awaiterPromise to null)213      awaiterPromise = Promise.resolve().then(awaiter);214    };215    // Define the wrapping task and its resolution strategy216    const clearAndReplaceWatcher = () => {217      const handleNotifiedIndex = this.scheduledWatchers.indexOf(handleNotified);218      if (handleNotifiedIndex !== -1) {219        this.scheduledWatchers.splice(handleNotifiedIndex, 1);220      }221      if (handleNotifiedIndex === 0 && this.scheduledWatchers.length !== 0) {222        this.scheduledWatchers[0]();223      }224    };225    const rewrappedTask = unscheduledTask.then(226      (ret) => {227        taskResolved = true;228        if (awaiterPromise === null) {229          clearAndReplaceWatcher();230          return ret;231        }232        return awaiterPromise.then(() => {233          clearAndReplaceWatcher();234          return ret;235        });236      },237      (err) => {238        taskResolved = true;239        if (awaiterPromise === null) {240          clearAndReplaceWatcher();241          throw err;242        }243        return awaiterPromise.then(() => {244          clearAndReplaceWatcher();245          throw err;246        });247      }248    );249    // Simulate `handleNotified` is the number of waiting tasks is not zero250    // Must be called after unscheduledTask.then otherwise, a promise could be released while251    // we already have the value for unscheduledTask ready252    if (this.scheduledTasks.length > 0 && this.scheduledWatchers.length === 0) {253      handleNotified();254    }255    this.scheduledWatchers.push(handleNotified);256    return rewrappedTask;257  }258  report(): SchedulerReportItem<TMetaData>[] {259    return [260      ...this.triggeredTasks,261      ...this.scheduledTasks.map(262        (t): SchedulerReportItem<TMetaData> => ({263          status: 'pending',264          schedulingType: t.schedulingType,265          taskId: t.taskId,266          label: t.label,267          metadata: t.metadata,268        })269      ),270    ];271  }272  toString(): string {273    return (274      'schedulerFor()`\n' +275      this.report()276        .map(SchedulerImplem.buildLog)277        .map((log) => `-> ${log}`)278        .join('\n') +279      '`'280    );281  }282  [cloneMethod](): Scheduler<TMetaData> {283    return new SchedulerImplem(this.act, this.sourceTaskSelector);284  }...Using AI Code Generation
1const { rewrappedTask } = require("fast-check-monorepo");2rewrappedTask();3const { rewrappedTask } = require("fast-check-monorepo");4rewrappedTask();5const { rewrappedTask } = require("fast-check-monorepo");6rewrappedTask();7const { rewrappedTask } = require("fast-check-monorepo");8rewrappedTask();9const { rewrappedTask } = require("fast-check-monorepo");10rewrappedTask();11const { rewrappedTask } = require("fast-check-monorepo");12rewrappedTask();13const { rewrappedTask } = require("fast-check-monorepo");14rewrappedTask();15const { rewrappedTask } = require("fast-check-monorepo");16rewrappedTask();17const { rewrappedTask } = require("fast-check-monorepo");18rewrappedTask();19const { rewrappedTask } = require("fast-check-monorepo");20rewrappedTask();21const { rewrappedTask } = require("fast-check-monorepo");22rewrappedTask();23const { rewrappedTask } = require("fast-check-monorepo");24rewrappedTask();25const { rewrappedTask }Using AI Code Generation
1const { rewrappedTask } = require('fast-check-monorepo');2rewrappedTask();3const { rewrappedTask } = require('fast-check');4rewrappedTask();5    at Object.<anonymous> (C:\Users\username\Documents\test3.js:4:15)6    at Module._compile (internal/modules/cjs/loader.js:1158:30)7    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)8    at Module.load (internal/modules/cjs/loader.js:1002:32)9    at Function.Module._load (internal/modules/cjs/loader.js:901:14)10    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)11const { rewrappedTask } = require('fast-check-monorepo');12rewrappedTask();13const { rewrappedTask } = require(require.resolve('fast-check'));14rewrappedTask();15    at Object.<anonymous> (C:\Users\username\Documents\test4.js:4:15)16    at Module._compile (internal/modules/cjs/loader.js:1158:30)17    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)18    at Module.load (internal/modules/cjs/loader.js:1002:32)19    at Function.Module._load (internal/modules/cjs/loader.js:901:14)20    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)Using AI Code Generation
1const fc = require('fast-check');2const {rewrappedTask} = require('fast-check-monorepo');3fc.assert(4  fc.property(5    fc.integer(),6    fc.integer(),7    fc.integer(),8    (a, b, c) => {9      const x = a + b + c;10      const y = a * b * c;11      return x > y;12    }13);14fc.assert(15  rewrappedTask(16    fc.property(17      fc.integer(),18      fc.integer(),19      fc.integer(),20      (a, b, c) => {21        const x = a + b + c;22        const y = a * b * c;23        return x > y;24      }25);26The rewrappedTask() method has the following signature:27rewrappedTask(property, settings)28The rewrappedTask() method can be used to run properties that have a high probability of failing. The Task will run the property in a separate processUsing AI Code Generation
1import { rewrappedTask } from 'fast-check-monorepo';2rewrappedTask();3import { rewrappedTask } from 'fast-check-monorepo';4rewrappedTask();5import { rewrappedTask } from 'fast-check-monorepo';6rewrappedTask();7import { rewrappedTask } from 'fast-check-monorepo';8rewrappedTask();9import { rewrappedTask } from 'fast-check-monorepo';10rewrappedTask();11import { rewrappedTask } from 'fast-check-monorepo';12rewrappedTask();13import { rewrappedTask } from 'fast-check-monorepo';14rewrappedTask();Using AI Code Generation
1const fc = require('fast-check');2const { rewrappedTask } = require('../src/index');3  .record({4    name: fc.string(),5    dependencies: fc.array(fc.string()),6    fn: fc.func(fc.anything()),7  })8  .map((task) => rewrappedTask(task));9fc.assert(10  fc.property(rewrappedTaskArb, (task) => {11    const { name, dependencies, fn } = task;12    return name === task.name && dependencies === task.dependencies && fn === task.fn;13  })14);15const fc = require('fast-check');16const { rewrappedTask } = require('../src/index');17  .record({18    name: fc.string(),19    dependencies: fc.array(fc.string()),20    fn: fc.func(fc.anything()),21  })22  .map((task) => rewrappedTask(task));23fc.assert(24  fc.property(rewrappedTaskArb, (task) => {25    const { name, dependencies, fn } = task;26    return name === task.name && dependencies === task.dependencies && fn === task.fn;27  })28);29const fc = require('fast-check');30const { rewrappedTask } = require('../src/index');31  .record({32    name: fc.string(),33    dependencies: fc.array(fc.string()),34    fn: fc.func(fc.anything()),35  })36  .map((task) => rewrappedTask(task));37fc.assert(38  fc.property(rewrappedTaskArb, (task) => {39    const { name, dependencies, fn } = task;40    return name === task.name && dependencies === task.dependencies && fn === task.fn;41  })42);43const fc = require('fast-check');44const { rewrappedTask } = require('../src/index');45  .record({46    name: fc.string(),47    dependencies: fc.array(fc.string()),48    fn: fc.func(fc.anything()),49  })50  .map((task) => rewrappedTask(task));Using AI Code Generation
1import { rewrappedTask } from 'fast-check-monorepo';2const task = rewrappedTask('test1.js', 'test2.js');3task.run().then((result) => {4  console.log(result);5});6import { rewrappedTask } from 'fast-check-monorepo';7const task = rewrappedTask('test1.js');8task.run().then((result) => {9  console.log(result);10});11import { rewrappedTask } from 'fast-check-monorepo';12const task = rewrappedTask();13task.run().then((result) => {14  console.log(result);15});16import { rewrappedTask } from 'fast-check-monorepo';17const task = rewrappedTask();18task.run().then((result) => {19  console.log(result);20});21import { rewrappedTask } from 'fast-check-monorepo';22const task = rewrappedTask();23task.run().then((result) => {24  console.log(result);25});26import { rewrappedTask } from 'fast-check-monorepo';27const task = rewrappedTask();28task.run().then((result) => {29  console.log(result);30});31import { rewrappedTask } from 'fast-check-monorepo';32const task = rewrappedTask();33task.run().then((result) => {34  console.log(result);35});36import { rewrappedTask } from 'fast-check-monorepo';37const task = rewrappedTask();38task.run().then((result) => {39  console.log(result);40});41import { rewrappedTask } from 'fast-check-monorepo';42const task = rewrappedTask();43task.run().then((resultUsing AI Code Generation
1import { rewrappedTask } from 'fast-check-monorepo';2const task = rewrappedTask('test3', 'test3', 1, 1, 1, 1, 1, 1, 1, 1);3task.run().then((result) => {4  console.log(result);5});6import { rewrappedTask } from 'fast-check-monorepo';7const task = rewrappedTask('test4', 'test4', 1, 1, 1, 1, 1, 1, 1, 1);8task.run().then((result) => {9  console.log(result);10});11import { rewrappedTask } from 'fast-check-monorepo';12const task = rewrappedTask('test5', 'test5', 1, 1, 1, 1, 1, 1, 1, 1);13task.run().then((result) => {14  console.log(result);15});16import { rewrappedTask } from 'fast-check-monorepo';17const task = rewrappedTask('test6', 'test6', 1, 1, 1, 1, 1, 1, 1, 1);18task.run().then((result) => {19  console.log(result);20});21import { rewrappedTask } from 'fast-check-monorepo';22const task = rewrappedTask('test7', 'test7', 1, 1, 1, 1, 1, 1, 1, 1);23task.run().then((result) => {24  console.log(result);25});26import { rewrappedTask } from 'fast-check-monorepo';27const task = rewrappedTask('test8', 'test8', 1, 1, 1, 1,Using AI Code Generation
1const { rewrappedTask } = require('fast-check-monorepo');2const { task } = require('fast-check');3const { task: task2 } = require('fast-check');4const { task: task3 } = require('fast-check');5const task1 = task(() => {6  console.log('task1');7  return 1;8});9const task4 = task(() => {10  console.log('task4');11  return 4;12});13const task5 = task(() => {14  console.log('task5');15  return 5;16});17const task6 = task(() => {18  console.log('task6');19  return 6;20});21const task7 = task(() => {22  console.log('task7');23  return 7;24});25const task8 = task(() => {26  console.log('task8');27  return 8;28});29const task9 = task(() => {30  console.log('task9');31  return 9;32});33const task10 = task(() => {34  console.log('task10');35  return 10;36});37const task11 = task(() => {38  console.log('task11');39  return 11;40});41const task12 = task(() => {42  console.log('task12');43  return 12;44});45const task13 = task(() => {46  console.log('task13');47  return 13;48});49const task14 = task(() => {50  console.log('task14');51  return 14;52});53const task15 = task(() => {54  console.log('task15');55  return 15;56});57const task16 = task(() => {58  console.log('task16');59  return 16;60});61const task17 = task(() => {62  console.log('task17');63  return 17;64});65const task18 = task(() => {66  console.log('task18');67  return 18;68});69const task19 = task(() => {70  console.log('task19');71  return 19;72});73const task20 = task(() => {74  console.log('task20');75  return 20;76});77const task21 = task(() => {78  console.log('task21');79  return 21;80});81const task22 = task(() => {82  console.log('task22');83  return 22;84});85const task23 = task(() => {Using AI Code Generation
1const { rewrappedTask } = require('fast-check-monorepo');2const task = () => console.log('task');3const rewrappedTask1 = rewrappedTask(task);4const rewrappedTask2 = rewrappedTask(rewrappedTask1);5console.log('running task in rewrapped context');6rewrappedTask1();7console.log('running rewrapped task in rewrapped context');8rewrappedTask2();9const { rewrappedTask } = require('fast-check-monorepo');10const task = () => console.log('task');11const rewrappedTask1 = rewrappedTask(task);12const rewrappedTask2 = rewrappedTask(rewrappedTask1);13console.log('running task in rewrapped context');14rewrappedTask1();15console.log('running rewrapped task in rewrapped context');16rewrappedTask2();17const { rewrappedTask } = require('fast-check-monorepo');18const task = () => console.log('task');19const rewrappedTask1 = rewrappedTask(task);20const rewrappedTask2 = rewrappedTask(rewrappedTask1);21console.log('running task in rewrapped context');22rewrappedTask1();23console.log('running rewrapped task inLearn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!
