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How to use CloneArbitrary method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

CloneArbitrary.spec.ts

Source:CloneArbitrary.spec.ts

...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    });...

clone.spec.ts

Source:clone.spec.ts

...6  jest.restoreAllMocks();7}8beforeEach(beforeEachHook);9describe('clone', () => {10  it('should instantiate CloneArbitrary(arb, numValues) for clone(arb, numValues)', () => {11    // Arrange12    const numValues = 10;13    const { instance: sourceArbitrary } = fakeArbitrary();14    const { instance } = fakeArbitrary();15    const CloneArbitrary = jest.spyOn(CloneArbitraryMock, 'CloneArbitrary');16    CloneArbitrary.mockImplementation(() => instance as CloneArbitraryMock.CloneArbitrary<unknown>);17    // Act18    const arb = clone(sourceArbitrary, numValues);19    // Assert20    expect(CloneArbitrary).toHaveBeenCalledWith(sourceArbitrary, numValues);21    expect(arb).toBe(instance);22  });...

clone.ts

Source:clone.ts

...20 * @public21 */22function clone<T, N extends number>(arb: Arbitrary<T>, numValues: N): Arbitrary<CloneValue<T, N>>;23function clone<T>(arb: Arbitrary<T>, numValues: number): Arbitrary<T[]> {24  return new CloneArbitrary(arb, numValues);25}...

Using AI Code Generation

1const { cloneArbitrary } = require('@dubzzz/fast-check');2const arb = cloneArbitrary([1, 2, 3]);3console.log(arb.generate());4const { cloneArbitrary } = require('@dubzzz/fast-check');5const arb = cloneArbitrary(new Date());6console.log(arb.generate());7array (arrayArbitrary: Arbitrary<T[]>) => Arbitrary<T[]>8const { array } = require('@dubzzz/fast-check');9const arb = array(arbInt());10console.log(arb.generate());11arraySet (arrayArbitrary: Arbitrary<T[]>) => Arbitrary<T[]>12const { arraySet } = require('@dubzzz/fast-check');13const arb = arraySet(arbInt());14console.log(arb.generate());15tuple (arbitraries: Arbitrary<T>[]) => Arbitrary<T[]>

Using AI Code Generation

1import { cloneArbitrary } from 'fast-check';2const arb = cloneArbitrary(42);3import { cloneArbitrary } from 'fast-check';4const arb = cloneArbitrary(42);5    at Object.generate (node_modules/fast-check/lib/check/arbitrary/CloneArbitrary.js:22:32)6    at Object.<anonymous> (test.js:6:10)7    at Module._compile (internal/modules/cjs/loader.js:1158:30)8    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)9    at Module.load (internal/modules/cjs/loader.js:1002:32)10    at Function.Module._load (internal/modules/cjs/loader.js:901:14)11    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)12@rajsolanki I don't see any issue with your code. Could you please provide a minimal reproducible example (with a package.json) so that I can have a look at it?

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