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How to use constraintsArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

date.spec.ts

Source:date.spec.ts

...17beforeEach(beforeEachHook);18describe('date', () => {19  it('should map on the output of an integer and specify mapper and unmapper', () =>20    fc.assert(21      fc.property(constraintsArb(), (constraints) => {22        // Arrange23        const { instance, map } = fakeArbitrary<number>();24        const { instance: mappedInstance } = fakeArbitrary<Date>();25        const integer = jest.spyOn(IntegerMock, 'integer');26        integer.mockReturnValue(instance);27        map.mockReturnValue(mappedInstance);28        // Act29        const arb = date(constraints);30        // Assert31        expect(arb).toBe(mappedInstance);32        expect(integer).toHaveBeenCalledTimes(1);33        expect(map).toHaveBeenCalledTimes(1);34        expect(map).toHaveBeenCalledWith(expect.any(Function), expect.any(Function));35      })36    ));37  it('should always map the minimal value of the internal integer to the requested minimal date', () =>38    fc.assert(39      fc.property(constraintsArb(), (constraints) => {40        // Arrange41        const { instance, map } = fakeArbitrary<number>();42        const { instance: mappedInstance } = fakeArbitrary<Date>();43        const integer = jest.spyOn(IntegerMock, 'integer');44        integer.mockReturnValue(instance);45        map.mockReturnValue(mappedInstance);46        // Act47        date(constraints);48        const { min: rangeMin } = integer.mock.calls[0][0]!;49        const [mapper] = map.mock.calls[0];50        const minDate = mapper(rangeMin!) as Date;51        // Assert52        if (constraints.min !== undefined) {53          // If min was specified,54          // the lowest value of the range requested to integer should map to it55          expect(minDate).toEqual(constraints.min);56        } else {57          // If min was not specified,58          // the lowest value of the range requested to integer should map to the smallest possible Date59          expect(minDate.getTime()).not.toBe(Number.NaN);60          expect(new Date(minDate.getTime() - 1).getTime()).toBe(Number.NaN);61        }62      })63    ));64  it('should always map the maximal value of the internal integer to the requested maximal date', () =>65    fc.assert(66      fc.property(constraintsArb(), (constraints) => {67        // Arrange68        const { instance, map } = fakeArbitrary<number>();69        const { instance: mappedInstance } = fakeArbitrary<Date>();70        const integer = jest.spyOn(IntegerMock, 'integer');71        integer.mockReturnValue(instance);72        map.mockReturnValue(mappedInstance);73        // Act74        date(constraints);75        const { max: rangeMax } = integer.mock.calls[0][0]!;76        const [mapper] = map.mock.calls[0];77        const maxDate = mapper(rangeMax!) as Date;78        // Assert79        if (constraints.max !== undefined) {80          // If max was specified,81          // the highest value of the range requested to integer should map to it82          expect(maxDate).toEqual(constraints.max);83        } else {84          // If max was not specified,85          // the highest value of the range requested to integer should map to the highest possible Date86          expect(maxDate.getTime()).not.toBe(Number.NaN);87          expect(new Date(maxDate.getTime() + 1).getTime()).toBe(Number.NaN);88        }89      })90    ));91  it('should always generate dates between min and max given the range and the mapper', () =>92    fc.assert(93      fc.property(constraintsArb(), fc.maxSafeNat(), (constraints, mod) => {94        // Arrange95        const { instance, map } = fakeArbitrary<number>();96        const { instance: mappedInstance } = fakeArbitrary<Date>();97        const integer = jest.spyOn(IntegerMock, 'integer');98        integer.mockReturnValue(instance);99        map.mockReturnValue(mappedInstance);100        // Act101        date(constraints);102        const { min: rangeMin, max: rangeMax } = integer.mock.calls[0][0]!;103        const [mapper] = map.mock.calls[0];104        const d = mapper(rangeMin! + (mod % (rangeMax! - rangeMin! + 1))) as Date;105        // Assert106        expect(d.getTime()).not.toBe(Number.NaN);107        if (constraints.min) expect(d.getTime()).toBeGreaterThanOrEqual(constraints.min.getTime());108        if (constraints.max) expect(d.getTime()).toBeLessThanOrEqual(constraints.max.getTime());109      })110    ));111  it('should throw whenever min is an invalid date', () =>112    fc.assert(113      fc.property(invalidMinConstraintsArb(), (constraints) => {114        // Act / Assert115        expect(() => date(constraints)).toThrowError();116      })117    ));118  it('should throw whenever max is an invalid date', () =>119    fc.assert(120      fc.property(invalidMaxConstraintsArb(), (constraints) => {121        // Act / Assert122        expect(() => date(constraints)).toThrowError();123      })124    ));125  it('should throw whenever min is greater than max', () =>126    fc.assert(127      fc.property(invalidRangeConstraintsArb(), (constraints) => {128        // Act / Assert129        expect(() => date(constraints)).toThrowError();130      })131    ));132});133describe('date (integration)', () => {134  type Extra = { min?: Date; max?: Date };135  const extraParameters: fc.Arbitrary<Extra> = constraintsArb();136  const isCorrect = (d: Date, extra: Extra) => {137    expect(d.getTime()).not.toBe(Number.NaN);138    if (extra.min) expect(d.getTime()).toBeGreaterThanOrEqual(extra.min.getTime());139    if (extra.max) expect(d.getTime()).toBeLessThanOrEqual(extra.max.getTime());140  };141  const isStrictlySmaller = (d1: Date, d2: Date) =>142    Math.abs(d1.getTime() - new Date(0).getTime()) < Math.abs(d2.getTime() - new Date(0).getTime());143  const dateBuilder = (extra: Extra) => date(extra);144  it('should produce the same values given the same seed', () => {145    assertProduceSameValueGivenSameSeed(dateBuilder, { extraParameters });146  });147  it('should only produce correct values', () => {148    assertProduceCorrectValues(dateBuilder, isCorrect, { extraParameters });149  });150  it('should produce values seen as shrinkable without any context', () => {151    assertProduceValuesShrinkableWithoutContext(dateBuilder, { extraParameters });152  });153  it('should be able to shrink to the same values without initial context', () => {154    assertShrinkProducesSameValueWithoutInitialContext(dateBuilder, { extraParameters });155  });156  it('should preserve strictly smaller ordering in shrink', () => {157    assertShrinkProducesStrictlySmallerValue(dateBuilder, isStrictlySmaller, { extraParameters });158  });159});160// Helpers161function constraintsArb() {162  return fc.tuple(fc.date(), fc.date(), fc.boolean(), fc.boolean()).map(([d1, d2, withMin, withMax]) => {163    const min = d1 < d2 ? d1 : d2;164    const max = d1 < d2 ? d2 : d1;165    return { min: withMin ? min : undefined, max: withMax ? max : undefined };166  });167}168function invalidRangeConstraintsArb() {169  return fc170    .tuple(fc.date(), fc.date())171    .filter(([d1, d2]) => +d1 !== +d2)172    .map(([d1, d2]) => {173      const min = d1 < d2 ? d1 : d2;174      const max = d1 < d2 ? d2 : d1;175      return { min: max, max: min };...

Using AI Code Generation

1import { constraintsArb } from 'fast-check-monorepo';2import { constraintsArb } from 'fast-check';3import { constraintsArb } from 'fast-check-monorepo';4import { constraintsArb } from 'fast-check';5import { constraintsArb } from 'fast-check-monorepo';6import { constraintsArb } from 'fast-check';7import { constraintsArb } from 'fast-check-monorepo';8import { constraintsArb } from 'fast-check';9import { constraintsArb } from 'fast-check-monorepo';10import { constraintsArb } from 'fast-check';11import { constraintsArb } from 'fast-check-monorepo';12import { constraintsArb } from 'fast-check';13import { constraintsArb } from 'fast-check-monorepo';14import { constraintsArb } from 'fast-check';15import { constraintsArb } from 'fast-check-monorepo';16import { constraintsArb } from 'fast-check';17import { constraintsArb } from 'fast-check-monorepo';18import { constraintsArb } from 'fast-check';19import { constraintsArb } from 'fast-check-monorepo';20import { constraintsAr

Using AI Code Generation

1const { constraintsArb } = require('fast-check-monorepo');2const { isInteger } = require('lodash');3const { isString } = require('lodash/fp');4const { isBoolean } = require('lodash/fp');5const arb = constraintsArb({6  a: { isInteger: true },7  b: { isString: true },8  c: { isBoolean: true }9});

Using AI Code Generation

1const { constraintsArb } = require('fast-check')2const { isInteger } = require('lodash')3const isEven = (num) => num % 2 === 04const evenArb = constraintsArb(isInteger, isEven)5const { constraintsArb } = require('fast-check')6const { isInteger } = require('lodash')7const isEven = (num) => num % 2 === 08const evenArb = constraintsArb(isInteger, isEven)9const { constraintsArb } = require('fast-check')10const { isInteger } = require('lodash')11const isEven = (num) => num % 2 === 012const evenArb = constraintsArb(isInteger, isEven)

Using AI Code Generation

1const fc = require('fast-check');2const { constraintsArb } = require('fast-check-monorepo');3  {4  },5  {6  },7  {8  },9  {10  }11let constraintsArb = constraintsArb(constraints);12fc.assert(13  fc.property(constraintsArb, (value) => {14    console.log(value);15    return true;16  })17);

Using AI Code Generation

1import { constraintsArb } from 'fast-check-monorepo';2import { constraints } from './constraints';3import { isString } from 'util';4import { isObject } from 'util';5import { isNumber } from 'util';6import { isBoolean } from 'util';7import { isArray } from 'util';8import { isFunction } from 'util';9const arb = constraintsArb(constraints);10arb.generate(mrng);11const constraints = {12  a: {13  },14  b: {15    properties: {16      b1: {17      },18      b2: {19      },20      b3: {21        items: {22          properties: {23            b3a: {24            },25            b3b: {26            },27          },28        },29      },30    },31  },32  c: {33    items: {34      properties: {35        c1: {36        },37        c2: {38        },39      },40    },41  },42  d: {43  },44};45export { constraints };46import { string } from 'fast-check';47import { object } from 'fast-check';48import { number } from 'fast-check';49import { boolean } from 'fast-check';50import { array } from 'fast-check';51import

Using AI Code Generation

1const {constraintsArb, validate} = require('fast-check-monorepo');2constraintsArb().chain(constraints => {3  return constraintsArb().map(constraints => {4    return validate(constraints, object);5  });6});7const {constraintsArb, validate} = require('fast-check-monorepo');8constraintsArb().chain(constraints => {9  return constraintsArb().map(constraints => {

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