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How to use noExecArbitrary method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

commands.spec.ts

Source:commands.spec.ts

1import * as fc from 'fast-check';2import { commands } from '../../../src/arbitrary/commands';3import prand from 'pure-rand';4import { Command } from '../../../src/check/model/command/Command';5import { Random } from '../../../src/random/generator/Random';6import { Arbitrary } from '../../../src/check/arbitrary/definition/Arbitrary';7import { Value } from '../../../src/check/arbitrary/definition/Value';8import { Stream } from '../../../src/stream/Stream';9import { tuple } from '../../../src/arbitrary/tuple';10import { nat } from '../../../src/arbitrary/nat';11import { isStrictlySmallerArray } from './__test-helpers__/ArrayHelpers';12type Model = Record<string, unknown>;13type Real = unknown;14type Cmd = Command<Model, Real>;15const model: Model = Object.freeze({});16const real: Real = Object.freeze({});17describe('commands (integration)', () => {18  function simulateCommands(cmds: Iterable<Cmd>): void {19    for (const c of cmds) {20      if (!c.check(model)) continue;21      try {22        c.run(model, real);23      } catch (err) {24        return;25      }26    }27  }28  it('should generate a cloneable instance', () => {29    fc.assert(30      fc.property(fc.integer(), fc.option(fc.integer({ min: 2 }), { nil: undefined }), (seed, biasFactor) => {31        // Arrange32        const mrng = new Random(prand.xorshift128plus(seed));33        const logOnCheck: { data: string[] } = { data: [] };34        // Act35        const commandsArb = commands([36          new FakeConstant(new SuccessCommand(logOnCheck)),37          new FakeConstant(new SkippedCommand(logOnCheck)),38          new FakeConstant(new FailureCommand(logOnCheck)),39        ]);40        const baseCommands = commandsArb.generate(mrng, biasFactor);41        // Assert42        return baseCommands.hasToBeCloned;43      })44    );45  });46  it('should skip skipped commands on shrink', () => {47    fc.assert(48      fc.property(fc.integer(), fc.option(fc.integer({ min: 2 }), { nil: undefined }), (seed, biasFactor) => {49        // Arrange50        const mrng = new Random(prand.xorshift128plus(seed));51        const logOnCheck: { data: string[] } = { data: [] };52        // Act53        const commandsArb = commands([54          new FakeConstant(new SuccessCommand(logOnCheck)),55          new FakeConstant(new SkippedCommand(logOnCheck)),56          new FakeConstant(new FailureCommand(logOnCheck)),57        ]);58        const baseCommands = commandsArb.generate(mrng, biasFactor);59        simulateCommands(baseCommands.value);60        // Assert61        const shrinks = commandsArb.shrink(baseCommands.value_, baseCommands.context);62        for (const shrunkCmds of shrinks) {63          logOnCheck.data = [];64          [...shrunkCmds.value].forEach((c) => c.check(model));65          expect(logOnCheck.data.every((e) => e !== 'skipped')).toBe(true);66        }67      })68    );69  });70  it('should shrink with failure at the end', () => {71    fc.assert(72      fc.property(fc.integer(), fc.option(fc.integer({ min: 2 }), { nil: undefined }), (seed, biasFactor) => {73        // Arrange74        const mrng = new Random(prand.xorshift128plus(seed));75        const logOnCheck: { data: string[] } = { data: [] };76        // Act77        const commandsArb = commands([78          new FakeConstant(new SuccessCommand(logOnCheck)),79          new FakeConstant(new SkippedCommand(logOnCheck)),80          new FakeConstant(new FailureCommand(logOnCheck)),81        ]);82        const baseCommands = commandsArb.generate(mrng, biasFactor);83        simulateCommands(baseCommands.value);84        fc.pre(logOnCheck.data[logOnCheck.data.length - 1] === 'failure');85        // Assert86        const shrinks = commandsArb.shrink(baseCommands.value_, baseCommands.context);87        for (const shrunkCmds of shrinks) {88          logOnCheck.data = [];89          [...shrunkCmds.value].forEach((c) => c.check(model));90          if (logOnCheck.data.length > 0) {91            // either empty or ending by the failure92            expect(logOnCheck.data[logOnCheck.data.length - 1]).toEqual('failure');93          }94        }95      })96    );97  });98  it('should shrink with at most one failure and all successes', () => {99    fc.assert(100      fc.property(fc.integer(), fc.option(fc.integer({ min: 2 }), { nil: undefined }), (seed, biasFactor) => {101        // Arrange102        const mrng = new Random(prand.xorshift128plus(seed));103        const logOnCheck: { data: string[] } = { data: [] };104        // Act105        const commandsArb = commands([106          new FakeConstant(new SuccessCommand(logOnCheck)),107          new FakeConstant(new SkippedCommand(logOnCheck)),108          new FakeConstant(new FailureCommand(logOnCheck)),109        ]);110        const baseCommands = commandsArb.generate(mrng, biasFactor);111        simulateCommands(baseCommands.value);112        // Assert113        const shrinks = commandsArb.shrink(baseCommands.value_, baseCommands.context);114        for (const shrunkCmds of shrinks) {115          logOnCheck.data = [];116          [...shrunkCmds.value].forEach((c) => c.check(model));117          expect(logOnCheck.data.every((e) => e === 'failure' || e === 'success')).toBe(true);118          expect(logOnCheck.data.filter((e) => e === 'failure').length <= 1).toBe(true);119        }120      })121    );122  });123  it('should provide commands which have never run', () => {124    const commandsArb = commands([new FakeConstant(new SuccessCommand({ data: [] }))], {125      disableReplayLog: true,126    });127    const manyArbsIncludingCommandsOne = tuple(nat(16), commandsArb, nat(16));128    const assertCommandsNotStarted = (value: Value<[number, Iterable<Cmd>, number]>) => {129      // Check the commands have never been executed130      // by checking the toString of the iterable is empty131      expect(String(value.value_[1])).toEqual('');132    };133    const startCommands = (value: Value<[number, Iterable<Cmd>, number]>) => {134      // Iterate over all the generated commands to run them all135      let ranOneCommand = false;136      for (const cmd of value.value_[1]) {137        ranOneCommand = true;138        cmd.run({}, {});139      }140      // Confirming that executing at least one command will make the toString of the iterable141      // not empty142      if (ranOneCommand) {143        expect(String(value.value_[1])).not.toEqual('');144      }145    };146    fc.assert(147      fc.property(148        fc.integer().noShrink(),149        fc.infiniteStream(fc.nat()),150        fc.option(fc.integer({ min: 2 }), { nil: undefined }),151        (seed, shrinkPath, biasFactor) => {152          // Generate the first Value153          const it = shrinkPath[Symbol.iterator]();154          const mrng = new Random(prand.xorshift128plus(seed));155          let currentValue: Value<[number, Iterable<Cmd>, number]> | null = manyArbsIncludingCommandsOne.generate(156            mrng,157            biasFactor158          );159          // Check status and update first Value160          assertCommandsNotStarted(currentValue);161          startCommands(currentValue);162          // Traverse the shrink tree in order to detect already seen ids163          while (currentValue !== null) {164            currentValue = manyArbsIncludingCommandsOne165              .shrink(currentValue.value_, currentValue.context)166              .map((nextValue) => {167                // Check nothing starting for the next one168                assertCommandsNotStarted(nextValue);169                // Start everything: not supposed to impact any other shrinkable170                startCommands(nextValue);171                return nextValue;172              })173              .getNthOrLast(it.next().value);174          }175        }176      )177    );178  });179  it('should shrink to smaller values', () => {180    const commandsArb = commands([nat(3).map((id) => new SuccessIdCommand(id))]);181    fc.assert(182      fc.property(183        fc.integer().noShrink(),184        fc.infiniteStream(fc.nat()),185        fc.option(fc.integer({ min: 2 }), { nil: undefined }),186        (seed, shrinkPath, biasFactor) => {187          // Generate the first Value188          const it = shrinkPath[Symbol.iterator]();189          const mrng = new Random(prand.xorshift128plus(seed));190          let currentValue: Value<Iterable<Cmd>> | null = commandsArb.generate(mrng, biasFactor);191          // Run all commands of first Value192          simulateCommands(currentValue.value_);193          // Traverse the shrink tree in order to detect already seen ids194          const extractIdRegex = /^custom\((\d+)\)$/;195          while (currentValue !== null) {196            const currentItems = [...currentValue.value_].map((c) => +extractIdRegex.exec(c.toString())![1]);197            currentValue = commandsArb198              .shrink(currentValue.value_, currentValue.context)199              .map((nextValue) => {200                // Run all commands of nextShrinkable201                simulateCommands(nextValue.value_);202                // Check nextShrinkable is strictly smaller than current one203                const nextItems = [...nextValue.value_].map((c) => +extractIdRegex.exec(c.toString())![1]);204                expect(isStrictlySmallerArray(nextItems, currentItems)).toBe(true);205                // Next is eligible for shrinking206                return nextValue;207              })208              .getNthOrLast(it.next().value);209          }210        }211      )212    );213  });214  it('should shrink the same way when based on replay data', () => {215    fc.assert(216      fc.property(217        fc.integer().noShrink(),218        fc.nat(100),219        fc.option(fc.integer({ min: 2 }), { nil: undefined }),220        (seed, numValues, biasFactor) => {221          // create unused logOnCheck222          const logOnCheck: { data: string[] } = { data: [] };223          // generate scenario and simulate execution224          const rng = prand.xorshift128plus(seed);225          const refArbitrary = commands([226            new FakeConstant(new SuccessCommand(logOnCheck)),227            new FakeConstant(new SkippedCommand(logOnCheck)),228            new FakeConstant(new FailureCommand(logOnCheck)),229            nat().map((v) => new SuccessIdCommand(v)),230          ]);231          const refValue: Value<Iterable<Cmd>> = refArbitrary.generate(new Random(rng), biasFactor);232          simulateCommands(refValue.value_);233          // trigger computation of replayPath234          // and extract shrinks for ref235          const refShrinks = [236            ...refArbitrary237              .shrink(refValue.value_, refValue.context)238              .take(numValues)239              .map((s) => [...s.value_].map((c) => c.toString())),240          ];241          // extract replayPath242          const replayPath = /\/\*replayPath=['"](.*)['"]\*\//.exec(refValue.value_.toString())![1];243          // generate scenario but do not simulate execution244          const noExecArbitrary = commands(245            [246              new FakeConstant(new SuccessCommand(logOnCheck)),247              new FakeConstant(new SkippedCommand(logOnCheck)),248              new FakeConstant(new FailureCommand(logOnCheck)),249              nat().map((v) => new SuccessIdCommand(v)),250            ],251            { replayPath }252          );253          const noExecValue: Value<Iterable<Cmd>> = noExecArbitrary.generate(new Random(rng), biasFactor);254          // check shrink values are identical255          const noExecShrinks = [256            ...noExecArbitrary257              .shrink(noExecValue.value_, noExecValue.context)258              .take(numValues)259              .map((s) => [...s.value_].map((c) => c.toString())),260          ];261          expect(noExecShrinks).toEqual(refShrinks);262        }263      )264    );265  });266});267// Helpers268class FakeConstant extends Arbitrary<Cmd> {269  constructor(private readonly cmd: Cmd) {270    super();271  }272  generate(): Value<Cmd> {273    return new Value(this.cmd, undefined);274  }275  canShrinkWithoutContext(value: unknown): value is Cmd {276    return false;277  }278  shrink(): Stream<Value<Cmd>> {279    return Stream.nil();280  }281}282class SuccessIdCommand implements Cmd {283  constructor(readonly id: number) {}284  check = () => true;285  run = () => {};286  toString = () => `custom(${this.id})`;287}288class SuccessCommand implements Cmd {289  constructor(readonly log: { data: string[] }) {}290  check = () => {291    this.log.data.push(this.toString());292    return true;293  };294  run = () => {};295  toString = () => 'success';296}297class SkippedCommand implements Cmd {298  constructor(readonly log: { data: string[] }) {}299  check = () => {300    this.log.data.push(this.toString());301    return false;302  };303  run = () => {};304  toString = () => 'skipped';305}306class FailureCommand implements Cmd {307  constructor(readonly log: { data: string[] }) {}308  check = () => {309    this.log.data.push(this.toString());310    return true;311  };312  run = () => {313    throw 'error';314  };315  toString = () => 'failure';...

Using AI Code Generation

1const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;2const fc = require('fast-check');3const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;4const fc = require('fast-check');5fc.assert(6  fc.property(fc.integer(), fc.integer(), (a, b) => {7    return noExecArbitrary(a, b);8  })9);10const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;11const fc = require('fast-check');12fc.assert(13  fc.property(fc.integer(), fc.integer(), (a, b) => {14    return noExecArbitrary(a, b);15  })16);17const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;18const fc = require('fast-check');19fc.assert(20  fc.property(fc.integer(), fc.integer(), (a, b) => {21    return noExecArbitrary(a, b);22  })23);24const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;25const fc = require('fast-check');26fc.assert(27  fc.property(fc.integer(), fc.integer(), (a, b) => {28    return noExecArbitrary(a, b);29  })30);31const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;32const fc = require('fast-check');33fc.assert(34  fc.property(fc.integer(), fc.integer(), (a, b) => {35    return noExecArbitrary(a, b);36  })37);38const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;39const fc = require('fast-check');40fc.assert(41  fc.property(fc.integer(), fc.integer(), (a, b) => {

Using AI Code Generation

1import { noExecArbitrary } from 'fast-check';2describe('noExecArbitrary', () => {3  it('should not execute the code', () => {4    fc.assert(5      fc.property(6        noExecArbitrary(fc.string()),7        (s) => {8          console.log(s);9          return true;10        }11    );12  });13});14  0 passing (1s)

Using AI Code Generation

1import { noExecArbitrary } from "fast-check-monorepo";2import { noExecArbitrary } from "fast-check-monorepo";3import { noExecArbitrary } from "fast-check-monorepo";4import { noExecArbitrary } from "fast-check-monorepo";5import { noExecArbitrary } from "fast-check-monorepo";6import { noExecArbitrary } from "fast-check-monorepo";7import { noExecArbitrary } from "fast-check-monorepo";8import { noExecArbitrary } from "fast-check-monorepo";9import { noExecArbitrary } from "fast-check-monorepo";10import { noExecArbitrary } from "fast-check-monorepo";11import { noExecArbitrary } from "fast-check-monorepo";12import { noExecArbitrary } from "fast-check-monorepo";13import { noExecArbitrary } from "fast-check-monorepo";14import { noExecArbitrary } from "fast-check-monorepo";15import { noExecArbitrary } from "fast-check-monorepo";

Using AI Code Generation

1const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;2fc.assert(3  fc.property(noExecArbitrary(fc.string()), (s) => {4    return s.indexOf('exec') === -1;5  })6);7const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;8fc.assert(9  fc.property(noExecArbitrary(fc.string()), (s) => {10    return s.indexOf('exec') === -1;11  })12);13const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;14fc.assert(15  fc.property(noExecArbitrary(fc.string()), (s) => {16    return s.indexOf('exec') === -1;17  })18);19const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;20fc.assert(21  fc.property(noExecArbitrary(fc.string()), (s) => {22    return s.indexOf('exec') === -1;23  })24);25const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;26fc.assert(27  fc.property(noExecArbitrary(fc.string()), (s) => {28    return s.indexOf('exec') === -1;29  })30);31const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;32fc.assert(33  fc.property(noExecArbitrary(fc.string()), (s) => {34    return s.indexOf('exec') === -1;35  })36);37const noExecArbitrary = require('fast-check-monorepo').noExecArbitrary;38fc.assert(39  fc.property(noExecArbitrary(fc.string()), (s) => {40    return s.indexOf('exec') === -1;41  })42);

Using AI Code Generation

1const fc = require('fast-check');2const { noExecArbitrary } = require('fast-check-monorepo');3const test = async () => {4  const arb = noExecArbitrary(fc.integer());5  const value = await fc.sample(arb, 1);6  console.log(value);7};8test();9{10  "dependencies": {11  }12}

Using AI Code Generation

1const fc = require('fast-check');2const { noExecArbitrary } = require('fast-check-monorepo');3const { noExecArbitrary } = require('fast-check-monorepo');4const arb = noExecArbitrary(fc.array(fc.integer()));5fc.assert(6  fc.property(arb, (a) => {7    console.log(a);8    return true;9  })10);

Using AI Code Generation

1const { noExecArbitrary } = require('fast-check-monorepo');2const { fc } = require('fast-check');3const { exec } = require('child_process');4const { command, args } = noExecArbitrary(5);6fc.assert(7  fc.property(command, args, (command, args) => {8    const child = exec(command, args);9  })10);11{12  "scripts": {13  },14  "dependencies": {15  }16}

Using AI Code Generation

1const { noExecArbitrary } = require('fast-check');2const { noExec } = noExecArbitrary();3noExec(1);4const { noExecArbitrary } = require('fast-check');5const { noExec } = noExecArbitrary();6noExec(1);7const { noExecArbitrary } = require('fast-check');8const { noExec } = noExecArbitrary();9noExec(1);10const { noExecArbitrary } = require('fast-check');11const { noExec } = noExecArbitrary();12noExec(1);13const { noExecArbitrary } = require('fast-check');14const { noExec } = noExecArbitrary();15noExec(1);16const { noExecArbitrary } = require('fast-check');17const { noExec } = noExecArbitrary();18noExec(1);19const { noExecArbitrary } = require('fast-check');20const { noExec } = noExecArbitrary();21noExec(1);22const { noExecArbitrary } = require('fast-check');23const { noExec } = noExecArbitrary();24noExec(1);25const { noExecArbitrary } = require('fast-check');26const { noExec } = noExecArbitrary();27noExec(1);28const { noExecArbitrary } = require('fast-check');29const { noExec } = noExecArbitrary();30noExec(1);31const { noExecArbitrary } = require('fast-check');32const { noExec }

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