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How to use sourceArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

StreamArbitrary.spec.ts

Source:StreamArbitrary.spec.ts

1import * as fc from 'fast-check';2import { StreamArbitrary } from '../../../../src/arbitrary/_internals/StreamArbitrary';3import { Value } from '../../../../src/check/arbitrary/definition/Value';4import { cloneIfNeeded, hasCloneMethod } from '../../../../src/check/symbols';5import { Stream } from '../../../../src/stream/Stream';6import {7  assertProduceCorrectValues,8  assertProduceSameValueGivenSameSeed,9} from '../__test-helpers__/ArbitraryAssertions';10import { FakeIntegerArbitrary, fakeArbitrary } from '../__test-helpers__/ArbitraryHelpers';11import { fakeRandom } from '../__test-helpers__/RandomHelpers';12import * as StringifyMock from '../../../../src/utils/stringify';13function beforeEachHook() {14  jest.resetModules();15  jest.restoreAllMocks();16  fc.configureGlobal({ beforeEach: beforeEachHook });17}18beforeEach(beforeEachHook);19describe('StreamArbitrary', () => {20  describe('generate', () => {21    it('should produce a cloneable instance of Stream', () => {22      // Arrange23      const biasFactor = 48;24      const { instance: sourceArb } = fakeArbitrary();25      const { instance: mrng } = fakeRandom();26      // Act27      const arb = new StreamArbitrary(sourceArb);28      const out = arb.generate(mrng, biasFactor);29      // Assert30      expect(out.value).toBeInstanceOf(Stream);31      expect(out.hasToBeCloned).toBe(true);32      expect(hasCloneMethod(out.value)).toBe(true);33    });34    it('should not call generate before we pull from the Stream but decide bias', () => {35      // Arrange36      const biasFactor = 48;37      const { instance: sourceArb, generate } = fakeArbitrary();38      const { instance: mrng, nextInt } = fakeRandom();39      // Act40      const arb = new StreamArbitrary(sourceArb);41      arb.generate(mrng, biasFactor).value;42      // Assert43      expect(nextInt).toHaveBeenCalledTimes(1);44      expect(nextInt).toHaveBeenCalledWith(1, biasFactor);45      expect(generate).not.toHaveBeenCalled();46    });47    it('should not check bias again for cloned instances', () => {48      // Arrange49      const biasFactor = 48;50      const { instance: sourceArb } = fakeArbitrary();51      const { instance: mrng, nextInt } = fakeRandom();52      // Act53      const arb = new StreamArbitrary(sourceArb);54      const out = arb.generate(mrng, biasFactor);55      const s1 = out.value;56      const s2 = out.value;57      // Assert58      expect(nextInt).toHaveBeenCalledTimes(1);59      expect(nextInt).toHaveBeenCalledWith(1, biasFactor);60      expect(s2).not.toBe(s1);61    });62    it('should call generate with cloned instance of Random as we pull from the Stream', () => {63      // Arrange64      const numValuesToPull = 5;65      const biasFactor = 48;66      let index = 0;67      const expectedValues = [...Array(numValuesToPull)].map(() => Symbol());68      const { instance: sourceArb, generate } = fakeArbitrary();69      generate.mockImplementation(() => new Value(expectedValues[index++], undefined));70      const { instance: mrng, clone, nextInt } = fakeRandom();71      nextInt.mockReturnValueOnce(1); // for bias72      const { instance: mrngCloned } = fakeRandom();73      clone.mockReturnValueOnce(mrngCloned);74      // Act75      const arb = new StreamArbitrary(sourceArb);76      const stream = arb.generate(mrng, biasFactor).value;77      const values = [...stream.take(numValuesToPull)];78      // Assert79      expect(generate).toHaveBeenCalledTimes(numValuesToPull);80      for (const call of generate.mock.calls) {81        expect(call).toEqual([mrngCloned, biasFactor]);82      }83      expect(values).toEqual(expectedValues);84    });85    it('should call generate with cloned instance of Random specific for each Stream', () => {86      // Arrange87      const numValuesToPullS1 = 5;88      const numValuesToPullS2 = 3;89      const biasFactor = 48;90      const { instance: sourceArb, generate } = fakeArbitrary();91      generate.mockImplementation(() => new Value(Symbol(), undefined));92      const { instance: mrng, clone, nextInt } = fakeRandom();93      nextInt.mockReturnValueOnce(1); // for bias94      const { instance: mrngClonedA } = fakeRandom();95      const { instance: mrngClonedB } = fakeRandom();96      clone.mockReturnValueOnce(mrngClonedA).mockReturnValueOnce(mrngClonedB);97      // Act98      const arb = new StreamArbitrary(sourceArb);99      const out = arb.generate(mrng, biasFactor);100      const s1 = out.value;101      const c1 = s1[Symbol.iterator]();102      for (let i = 0; i !== numValuesToPullS1; ++i) {103        const next = c1.next();104        expect(next.done).toBe(false);105      }106      const s2 = out.value;107      const c2 = s2[Symbol.iterator]();108      for (let i = 0; i !== numValuesToPullS2; ++i) {109        const next = c2.next();110        expect(next.done).toBe(false);111      }112      c1.next();113      // Assert114      expect(generate).toHaveBeenCalledTimes(numValuesToPullS1 + numValuesToPullS2 + 1);115      const calls = generate.mock.calls;116      for (let i = 0; i !== numValuesToPullS1; ++i) {117        const call = calls[i];118        expect(call).toEqual([mrngClonedA, biasFactor]);119      }120      for (let i = 0; i !== numValuesToPullS2; ++i) {121        const call = calls[numValuesToPullS1 + i];122        expect(call).toEqual([mrngClonedB, biasFactor]);123      }124      expect(calls[numValuesToPullS1 + numValuesToPullS2]).toEqual([mrngClonedA, biasFactor]);125    });126    it('should only print pulled values on print', () =>127      fc.assert(128        fc.property(fc.array(fc.integer()), (expectedValues) => {129          // Arrange130          const biasFactor = 48;131          let index = 0;132          const { instance: sourceArb, generate } = fakeArbitrary<number>();133          generate.mockImplementation(() => new Value(expectedValues[index++], undefined));134          const { instance: mrng, clone, nextInt } = fakeRandom();135          nextInt.mockReturnValueOnce(2); // for no bias136          const { instance: mrngCloned } = fakeRandom();137          clone.mockReturnValueOnce(mrngCloned);138          const fakeStringify = (v: unknown) => '<' + String(v) + '>';139          const stringify = jest.spyOn(StringifyMock, 'stringify');140          stringify.mockImplementation(fakeStringify);141          // Act142          const arb = new StreamArbitrary(sourceArb);143          const stream = arb.generate(mrng, biasFactor).value;144          const values = [...stream.take(expectedValues.length)];145          // Assert146          expect(values).toEqual(expectedValues);147          expect(String(stream)).toEqual(`Stream(${expectedValues.map(fakeStringify).join(',')}â¦)`);148          expect(stringify).toHaveBeenCalledTimes(expectedValues.length);149          expect(generate).toHaveBeenCalledTimes(expectedValues.length);150          if (expectedValues.length > 0) {151            expect(generate).toHaveBeenCalledWith(mrngCloned, undefined);152          }153        })154      ));155    it('should create independant Stream even in terms of toString', () => {156      // Arrange157      const biasFactor = 48;158      let index = 0;159      const { instance: sourceArb, generate } = fakeArbitrary<number>();160      generate.mockImplementation(() => new Value(index++, undefined));161      const { instance: mrng, clone, nextInt } = fakeRandom();162      nextInt.mockReturnValueOnce(2); // for no bias163      const { instance: mrngCloned } = fakeRandom();164      clone.mockReturnValueOnce(mrngCloned);165      const stringify = jest.spyOn(StringifyMock, 'stringify');166      stringify.mockImplementation((v) => '<' + String(v) + '>');167      // Act168      const arb = new StreamArbitrary(sourceArb);169      const out = arb.generate(mrng, biasFactor);170      const stream1 = out.value;171      const stream2 = out.value;172      const values1 = [...stream1.take(2)];173      const values2 = [...stream2.take(3)];174      const values1Bis = [...stream1.take(2)];175      // Assert176      expect(values1).toEqual([0, 1]);177      expect(values2).toEqual([2, 3, 4]);178      expect(values1Bis).toEqual([5, 6]);179      expect(String(stream1)).toEqual(`Stream(<0>,<1>,<5>,<6>â¦)`);180      expect(String(stream2)).toEqual(`Stream(<2>,<3>,<4>â¦)`);181      expect(stringify).toHaveBeenCalledTimes(7);182      expect(generate).toHaveBeenCalledTimes(7);183    });184  });185  describe('canShrinkWithoutContext', () => {186    function* infiniteG() {187      yield 1;188    }189    it.each`190      data                         | description191      ${Stream.nil()}              | ${'empty stream'}192      ${Stream.of(1, 5, 6, 74, 4)} | ${'finite stream'}193      ${new Stream(infiniteG())}   | ${'infinite stream'}194    `('should return false for any Stream whatever the size ($description)', ({ data }) => {195      // Arrange196      const { instance: sourceArb, canShrinkWithoutContext } = fakeArbitrary();197      // Act198      const arb = new StreamArbitrary(sourceArb);199      const out = arb.canShrinkWithoutContext(data);200      // Assert201      expect(out).toBe(false);202      expect(canShrinkWithoutContext).not.toHaveBeenCalled();203    });204    it('should return false even for its own values', () => {205      // Arrange206      const { instance: sourceArb, canShrinkWithoutContext } = fakeArbitrary();207      const { instance: mrng } = fakeRandom();208      // Act209      const arb = new StreamArbitrary(sourceArb);210      const g = arb.generate(mrng, undefined);211      const out = arb.canShrinkWithoutContext(g.value);212      // Assert213      expect(out).toBe(false);214      expect(canShrinkWithoutContext).not.toHaveBeenCalled();215    });216  });217  describe('shrink', () => {218    it('should always shrink to nil', () => {219      // Arrange220      const { instance: sourceArb, generate, shrink } = fakeArbitrary<number>();221      generate.mockReturnValue(new Value(0, undefined));222      const { instance: mrng } = fakeRandom();223      // Act224      const arb = new StreamArbitrary(sourceArb);225      const { value, context } = arb.generate(mrng, undefined);226      const pullValues = [...value.take(50)];227      const shrinks = [...arb.shrink(value, context)];228      // Assert229      expect(pullValues).toBeDefined();230      expect(shrinks).toHaveLength(0);231      expect(shrink).not.toHaveBeenCalled();232    });233  });234});235describe('StreamArbitrary (integration)', () => {236  const sourceArb = new FakeIntegerArbitrary();237  const isEqual = (s1: Stream<number>, s2: Stream<number>) => {238    expect([...cloneIfNeeded(s1).take(10)]).toEqual([...cloneIfNeeded(s2).take(10)]);239  };240  const isCorrect = (value: Stream<number>) =>241    value instanceof Stream && [...value.take(10)].every((v) => sourceArb.canShrinkWithoutContext(v));242  const streamBuilder = () => new StreamArbitrary(sourceArb);243  it('should produce the same values given the same seed', () => {244    assertProduceSameValueGivenSameSeed(streamBuilder, { isEqual });245  });246  it('should only produce correct values', () => {247    assertProduceCorrectValues(streamBuilder, isCorrect);248  });...

CloneArbitrary.spec.ts

Source:CloneArbitrary.spec.ts

1import fc from 'fast-check';2import { CloneArbitrary } from '../../../../src/arbitrary/_internals/CloneArbitrary';3import { Arbitrary } from '../../../../src/check/arbitrary/definition/Arbitrary';4import { Value } from '../../../../src/check/arbitrary/definition/Value';5import { cloneMethod, hasCloneMethod } from '../../../../src/check/symbols';6import { Random } from '../../../../src/random/generator/Random';7import { Stream } from '../../../../src/stream/Stream';8import {9  assertProduceValuesShrinkableWithoutContext,10  assertProduceCorrectValues,11  assertShrinkProducesSameValueWithoutInitialContext,12  assertShrinkProducesStrictlySmallerValue,13  assertProduceSameValueGivenSameSeed,14} from '../__test-helpers__/ArbitraryAssertions';15import { FakeIntegerArbitrary, fakeArbitrary } from '../__test-helpers__/ArbitraryHelpers';16import { fakeRandom } from '../__test-helpers__/RandomHelpers';17import { buildShrinkTree, renderTree, walkTree } from '../__test-helpers__/ShrinkTree';18describe('CloneArbitrary', () => {19  describe('generate', () => {20    it('should call generate numValues times on the passed arbitrary', () => {21      // Arrange22      const numValues = 3;23      const biasFactor = 48;24      const producedValue = Symbol();25      const { instance: mrng, clone } = fakeRandom();26      const { instance: mrngClone1 } = fakeRandom();27      const { instance: mrngClone2 } = fakeRandom();28      clone.mockReturnValueOnce(mrngClone1).mockReturnValueOnce(mrngClone2);29      const { instance: sourceArb, generate } = fakeArbitrary<symbol>();30      generate.mockReturnValue(new Value(producedValue, undefined));31      // Act32      const arb = new CloneArbitrary(sourceArb, numValues);33      const out = arb.generate(mrng, biasFactor);34      // Assert35      expect(out.value).toEqual([producedValue, producedValue, producedValue]);36      expect(generate).toHaveBeenCalledTimes(3);37      expect(generate).toHaveBeenCalledWith(mrngClone1, biasFactor);38      expect(generate).toHaveBeenCalledWith(mrngClone2, biasFactor);39      expect(generate).toHaveBeenLastCalledWith(mrng, biasFactor);40    });41    it.each`42      type               | cloneable43      ${'non-cloneable'} | ${false}44      ${'cloneable'}     | ${true}45    `('should produce a $type tuple when sub-value is $type', ({ cloneable }) => {46      // Arrange47      const numValues = 1;48      const { instance: mrng } = fakeRandom();49      const { instance: sourceArb, generate } = fakeArbitrary<unknown>();50      if (cloneable) generate.mockReturnValue(new Value({ [cloneMethod]: jest.fn() }, undefined));51      else generate.mockReturnValue(new Value({ m: jest.fn() }, undefined));52      // Act53      const arb = new CloneArbitrary(sourceArb, numValues);54      const out = arb.generate(mrng, numValues);55      // Assert56      expect(out.hasToBeCloned).toBe(cloneable);57      expect(hasCloneMethod(out.value)).toBe(cloneable);58    });59  });60  describe('canShrinkWithoutContext', () => {61    it('should return false if passed value does not have the right length', () =>62      fc.assert(63        fc.property(fc.nat({ max: 1000 }), fc.nat({ max: 1000 }), (numValues, numRequestedValues) => {64          // Arrange65          fc.pre(numValues !== numRequestedValues);66          const { instance: sourceArb, canShrinkWithoutContext } = fakeArbitrary();67          // Act68          const arb = new CloneArbitrary(sourceArb, numValues);69          const out = arb.canShrinkWithoutContext([...Array(numRequestedValues)]);70          // Assert71          expect(out).toBe(false);72          expect(canShrinkWithoutContext).not.toHaveBeenCalled();73        })74      ));75    it('should return false if values are not equal regarding Object.is', () => {76      // Arrange77      const { instance: sourceArb, canShrinkWithoutContext } = fakeArbitrary();78      // Act79      const arb = new CloneArbitrary(sourceArb, 2);80      const out = arb.canShrinkWithoutContext([{}, {}]);81      // Assert82      expect(out).toBe(false);83      expect(canShrinkWithoutContext).not.toHaveBeenCalled();84    });85    it.each`86      canShrinkWithoutContextValue87      ${true}88      ${false}89    `(90      'should ask sub-arbitrary whenever length is correct and children are equal regarding Object.is',91      ({ canShrinkWithoutContextValue }) => {92        // Arrange93        const value = {};94        const { instance: sourceArb, canShrinkWithoutContext } = fakeArbitrary();95        canShrinkWithoutContext.mockReturnValue(canShrinkWithoutContextValue);96        // Act97        const arb = new CloneArbitrary(sourceArb, 2);98        const out = arb.canShrinkWithoutContext([value, value]);99        // Assert100        expect(out).toBe(canShrinkWithoutContextValue);101        expect(canShrinkWithoutContext).toHaveBeenCalledTimes(1);102        expect(canShrinkWithoutContext).toHaveBeenCalledWith(value);103      }104    );105  });106  describe('shrink', () => {107    it('should shrink numValues times the value and zip the outputs together', () => {108      // Arrange109      const value = Symbol();110      const s1 = Symbol();111      const s2 = Symbol();112      const numValues = 3;113      const { instance: sourceArb, shrink } = fakeArbitrary<symbol>();114      shrink115        .mockReturnValueOnce(Stream.of<Value<symbol>>(new Value(s1, undefined), new Value(s2, undefined)))116        .mockReturnValueOnce(Stream.of<Value<symbol>>(new Value(s1, undefined), new Value(s2, undefined)))117        .mockReturnValueOnce(Stream.of<Value<symbol>>(new Value(s1, undefined), new Value(s2, undefined)));118      // Act119      const arb = new CloneArbitrary(sourceArb, numValues);120      const shrinks = [...arb.shrink([value, value, value])];121      // Assert122      expect(shrinks.map((v) => v.value)).toEqual([123        [s1, s1, s1],124        [s2, s2, s2],125      ]);126      expect(shrink).toHaveBeenCalledTimes(3);127      expect(shrink).toHaveBeenCalledWith(value, undefined);128    });129  });130});131describe('CloneArbitrary (integration)', () => {132  type Extra = number;133  const extraParameters: fc.Arbitrary<Extra> = fc.nat({ max: 100 });134  const isCorrect = (value: number[], extra: Extra) =>135    Array.isArray(value) && value.length === extra && new Set(value).size <= 1;136  // Should never be called for extra = 0137  const isStrictlySmaller = (t1: number[], t2: number[]) => t1[0] < t2[0];138  const cloneBuilder = (extra: Extra) => new CloneArbitrary(new FakeIntegerArbitrary(), extra);139  it('should produce the same values given the same seed', () => {140    assertProduceSameValueGivenSameSeed(cloneBuilder, { extraParameters });141  });142  it('should only produce correct values', () => {143    assertProduceCorrectValues(cloneBuilder, isCorrect, { extraParameters });144  });145  it('should produce values seen as shrinkable without any context', () => {146    // Only when equal regarding Object.is147    assertProduceValuesShrinkableWithoutContext(cloneBuilder, { extraParameters });148  });149  it('should be able to shrink to the same values without initial context (if underlyings do)', () => {150    assertShrinkProducesSameValueWithoutInitialContext(cloneBuilder, { extraParameters });151  });152  it('should preserve strictly smaller ordering in shrink (if underlyings do)', () => {153    assertShrinkProducesStrictlySmallerValue(cloneBuilder, isStrictlySmaller, { extraParameters });154  });155  it('should produce the right shrinking tree', () => {156    // Arrange157    const arb = new CloneArbitrary(new FirstArbitrary(), 5);158    const { instance: mrng } = fakeRandom();159    // Act160    const g = arb.generate(mrng, undefined);161    const renderedTree = renderTree(buildShrinkTree(arb, g)).join('\n');162    // Assert163    expect(renderedTree).toMatchInlineSnapshot(`164      "[4,4,4,4,4]165      â> [2,2,2,2,2]166      |  â> [0,0,0,0,0]167      â> [3,3,3,3,3]168         â> [0,0,0,0,0]169         â> [1,1,1,1,1]"170    `);171  });172  it('should not re-use twice the same instance of cloneable', () => {173    // Arrange174    const alreadySeenCloneable = new Set<unknown>();175    const arb = new CloneArbitrary(new CloneableArbitrary(), 5);176    const { instance: mrng } = fakeRandom();177    // Act178    const g = arb.generate(mrng, undefined);179    const treeA = buildShrinkTree(arb, g);180    const treeB = buildShrinkTree(arb, g);181    // Assert182    walkTree(treeA, ([_first, cloneable, _second]) => {183      expect(alreadySeenCloneable.has(cloneable)).toBe(false);184      alreadySeenCloneable.add(cloneable);185    });186    walkTree(treeB, ([_first, cloneable, _second]) => {187      expect(alreadySeenCloneable.has(cloneable)).toBe(false);188      alreadySeenCloneable.add(cloneable);189    });190  });191});192// Helpers193const expectedFirst = 4;194class FirstArbitrary extends Arbitrary<number> {195  generate(_mrng: Random): Value<number> {196    return new Value(expectedFirst, { step: 2 });197  }198  canShrinkWithoutContext(_value: unknown): _value is number {199    throw new Error('No call expected in that scenario');200  }201  shrink(value: number, context?: unknown): Stream<Value<number>> {202    if (typeof context !== 'object' || context === null || !('step' in context)) {203      throw new Error('Invalid context for FirstArbitrary');204    }205    if (value <= 0) {206      return Stream.nil();207    }208    const currentStep = (context as { step: number }).step;209    const nextStep = currentStep + 1;210    return Stream.of(211      ...(value - currentStep >= 0 ? [new Value(value - currentStep, { step: nextStep })] : []),212      ...(value - currentStep + 1 >= 0 ? [new Value(value - currentStep + 1, { step: nextStep })] : [])213    );214  }215}216class CloneableArbitrary extends Arbitrary<number[]> {217  private instance() {218    return Object.defineProperty([], cloneMethod, { value: () => this.instance() });219  }220  generate(_mrng: Random): Value<number[]> {221    return new Value(this.instance(), { shrunkOnce: false });222  }223  canShrinkWithoutContext(_value: unknown): _value is number[] {224    throw new Error('No call expected in that scenario');225  }226  shrink(value: number[], context?: unknown): Stream<Value<number[]>> {227    if (typeof context !== 'object' || context === null || !('shrunkOnce' in context)) {228      throw new Error('Invalid context for CloneableArbitrary');229    }230    const safeContext = context as { shrunkOnce: boolean };231    if (safeContext.shrunkOnce) {232      return Stream.nil();233    }234    return Stream.of(new Value(this.instance(), { shrunkOnce: true }));235  }...

AdapterArbitrary.ts

Source:AdapterArbitrary.ts

1import { Arbitrary } from '../../check/arbitrary/definition/Arbitrary';2import { Value } from '../../check/arbitrary/definition/Value';3import { Random } from '../../random/generator/Random';4import { Stream } from '../../stream/Stream';5/** @internal */6export type AdapterOutput<T> = { adapted: boolean; value: T };7/** @internal */8const AdaptedValue = Symbol('adapted-value');9/** @internal */10function toAdapterValue<T>(rawValue: Value<T>, adapter: (value: T) => AdapterOutput<T>): Value<T> {11  const adapted = adapter(rawValue.value_);12  if (!adapted.adapted) {13    return rawValue; // No need to adapt it14  }15  return new Value(adapted.value, AdaptedValue);16}17/**18 * @internal19 * Adapt an existing Arbitrary by truncating its generating values20 * if they don't fit the requirements21 */22class AdapterArbitrary<T> extends Arbitrary<T> {23  private readonly adaptValue: (rawValue: Value<T>) => Value<T>;24  constructor(private readonly sourceArb: Arbitrary<T>, private readonly adapter: (value: T) => AdapterOutput<T>) {25    super();26    this.adaptValue = (rawValue) => toAdapterValue(rawValue, adapter);27  }28  generate(mrng: Random, biasFactor: number | undefined): Value<T> {29    const rawValue = this.sourceArb.generate(mrng, biasFactor);30    return this.adaptValue(rawValue);31  }32  canShrinkWithoutContext(value: unknown): value is T {33    return this.sourceArb.canShrinkWithoutContext(value) && !this.adapter(value).adapted;34  }35  shrink(value: T, context: unknown): Stream<Value<T>> {36    if (context === AdaptedValue) {37      if (!this.sourceArb.canShrinkWithoutContext(value)) {38        return Stream.nil();39      }40      return this.sourceArb.shrink(value, undefined).map(this.adaptValue);41    }42    return this.sourceArb.shrink(value, context).map(this.adaptValue);43  }44}45/** @internal */46export function adapter<T>(sourceArb: Arbitrary<T>, adapter: (value: T) => AdapterOutput<T>): Arbitrary<T> {47  return new AdapterArbitrary(sourceArb, adapter);...

Using AI Code Generation

1const { sourceArb } = require('fast-check-monorepo');2const { arb } = require('fast-check');3const fc = require('fast-check');4const { arb } = require('fast-check');5const fc = require('fast-check');6const { sourceArb } = require('fast-check-monorepo');7const { arb } = require('fast-check');8const fc = require('fast-check');9const { sourceArb } = require('fast-check-monorepo');10const { arb } = require('fast-check');11const fc = require('fast-check');12const { sourceArb } = require('fast-check-monorepo');13const { arb } = require('fast-check');14const fc = require('fast-check');15const { sourceArb } = require('fast-check-monorepo');16const { arb } = require('fast-check');17const fc = require('fast-check');18const { sourceArb } = require('fast-check-monorepo');19const { arb } = require('fast-check');20const fc = require('fast-check');21const { sourceArb } = require('fast-check-monorepo');22const { arb } = require('fast-check');23const fc = require('fast-check

Using AI Code Generation

1var sourceArb = require('fast-check-monorepo').sourceArb2var fc = require('fast-check')3var test = require('tape')4test('test', function (t) {5  t.plan(1)6  fc.assert(fc.property(sourceArb, function (source) {7    t.pass()8  }))9})10{11  "scripts": {12  },13  "dependencies": {14  }15}16node -e "console.log(require('fast-check-monorepo').sourceArb)"

Using AI Code Generation

1const { sourceArb } = require('fast-check-monorepo');2const fc = require('fast-check');3const path = require('path');4const test = async () => {5  const arb = sourceArb(path.join(__dirname, 'src'));6  const result = await fc.assert(fc.property(arb, (str) => {7    console.log(str);8    return true;9  }));10  console.log(result);11};12test();

Using AI Code Generation

1const fc = require('fast-check');2const { sourceArb } = require('fast-check-monorepo');3const { sourceArb: sourceArb2 } = require('fast-check-monorepo');4const fc2 = require('fast-check');5const { sourceArb: sourceArb3 } = require('fast-check');6console.log(sourceArb);7console.log(sourceArb2);8console.log(sourceArb3);9const fc = require('fast-check-monorepo');10const { sourceArb } = require('fast-check-monorepo');11const { sourceArb: sourceArb2 } = require('fast-check-monorepo');12const fc2 = require('fast-check');13const { sourceArb: sourceArb3 } = require('fast-check');14console.log(sourceArb);15console.log(sourceArb2);16console.log(sourceArb3);17const fc = require(require.resolve('fast-check-monorepo'));18const { sourceArb } = require(require.resolve('fast-check-monorepo'));19const { sourceArb: sourceArb2 } = require(require.resolve('fast-check-monorepo'));20const fc2 = require('fast-check');21const { sourceArb: sourceArb3 } = require('fast-check');22console.log(sourceArb);23console.log(sourceArb2);24console.log(sourceArb3);

Using AI Code Generation

1const { sourceArb } = require('fast-check-monorepo');2const fc = require('fast-check');3const { run } = require('fast-check/lib/check/arbitrary/definition/Runner.js');4const arb = sourceArb(fc.integer(), fc.integer());5const result = run(arb, { numRuns: 100 });6console.log(result);7{8  "scripts": {9  },10  "dependencies": {11  }12}

Automation Testing Tutorials

Learn 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.