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How to use mapToConstantBuilder method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

mapToConstant.spec.ts

Source:mapToConstant.spec.ts

1import fc from 'fast-check';2import { mapToConstant } from '../../../src/arbitrary/mapToConstant';3import { Value } from '../../../src/check/arbitrary/definition/Value';4import {5  assertProduceValuesShrinkableWithoutContext,6  assertProduceCorrectValues,7  assertShrinkProducesSameValueWithoutInitialContext,8  assertProduceSameValueGivenSameSeed,9} from './__test-helpers__/ArbitraryAssertions';10import { buildShrinkTree, renderTree } from './__test-helpers__/ShrinkTree';11describe('mapToConstant', () => {12  it('should reject any inputs containing at least one strictly negative entry', () =>13    fc.assert(14      fc.property(fc.array(fc.nat()), fc.array(fc.nat()), fc.integer({ max: -1 }), (beforeNeg, afterNeg, neg) => {15        // Arrange16        const entries = [...beforeNeg, neg, ...afterNeg].map((num) => ({ num, build: jest.fn() }));17        // Act / Assert18        expect(() => mapToConstant(...entries)).toThrowError();19      })20    ));21  it('should reject any inputs summing to zero', () =>22    fc.assert(23      fc.property(fc.nat({ max: 1000 }), (length) => {24        // Arrange25        const entries = [...Array(length)].map(() => ({ num: 0, build: jest.fn() }));26        // Act / Assert27        expect(() => mapToConstant(...entries)).toThrowError();28      })29    ));30  it('should accept any inputs not summing to zero and with positive or null values', () =>31    fc.assert(32      fc.property(fc.array(fc.nat(), { minLength: 1 }), (nums) => {33        // Arrange34        fc.pre(nums.some((n) => n > 0));35        const entries = nums.map((num) => ({ num, build: jest.fn() }));36        // Act / Assert37        expect(() => mapToConstant(...entries)).not.toThrowError();38      })39    ));40});41describe('mapToConstant (integration)', () => {42  type Extra = unknown[][];43  const extraParameters: fc.Arbitrary<Extra> = fc.array(fc.uniqueArray(fc.anything(), { minLength: 1 }), {44    minLength: 1,45  });46  const isCorrect = (value: unknown, extra: Extra) => {47    for (const entryCandidate of extra) {48      if (entryCandidate.includes(value)) {49        // -0 and 0 are mixed by include50        return true;51      }52    }53    return false;54  };55  const mapToConstantBuilder = (extra: Extra) => {56    const alreadySeenConstants = new Set<unknown>();57    const entries: { num: number; build: (index: number) => unknown }[] = [];58    for (const entryCandidate of extra) {59      // Only keep values (aka constants) never seen before (-0 and 0) will be mixed due to Set60      const trimmedConstants = entryCandidate.filter((c) => !alreadySeenConstants.has(c));61      entries.push({ num: trimmedConstants.length, build: (index: number) => trimmedConstants[index] });62      trimmedConstants.forEach((c) => alreadySeenConstants.add(c));63    }64    return mapToConstant(...entries);65  };66  it('should produce the same values given the same seed', () => {67    assertProduceSameValueGivenSameSeed(mapToConstantBuilder, { extraParameters });68  });69  it('should only produce correct values', () => {70    assertProduceCorrectValues(mapToConstantBuilder, isCorrect, { extraParameters });71  });72  it('should produce values seen as shrinkable without any context', () => {73    assertProduceValuesShrinkableWithoutContext(mapToConstantBuilder, { extraParameters });74  });75  it('should be able to shrink to the same values without initial context', () => {76    assertShrinkProducesSameValueWithoutInitialContext(mapToConstantBuilder, { extraParameters });77  });78  it('should be able to shrink c given hexa-like entries', () => {79    // Arrange80    const arb = mapToConstant(81      { num: 10, build: (index) => String.fromCodePoint(index + 48) }, // 0-982      { num: 6, build: (index) => String.fromCodePoint(index + 97) } // a-f83    );84    const rawValue = 'c';85    const value = new Value(rawValue, undefined);86    // Act87    const renderedTree = renderTree(buildShrinkTree(arb, value)).join('\n');88    // Assert89    expect(arb.canShrinkWithoutContext(rawValue)).toBe(true);90    expect(renderedTree).toMatchSnapshot();91  });...

Using AI Code Generation

1const { mapToConstantBuilder } = require('fast-check');2const { constantFrom } = require('fast-check/lib/check/arbitrary/ConstantArbitrary.js');3const { constant } = require('fast-check/lib/check/arbitrary/ConstantArbitrary.js');4const { tuple } = require('fast-check/lib/check/arbitrary/TupleArbitrary.js');5const { record } = require('fast-check/lib/check/arbitrary/RecordArbitrary.js');6const { string } = require('fast-check/lib/check/arbitrary/StringArbitrary.js');7const { option } = require('fast-check/lib/check/arbitrary/OptionArbitrary.js');8const { oneof } = require('fast-check/lib/check/arbitrary/OneOfArbitrary.js');9const { frequency } = require('fast-check/lib/check/arbitrary/FrequencyArbitrary.js');10const { array } = require('fast-check/lib/check/arbitrary/ArrayArbitrary.js');11const { set } = require('fast-check/lib/check/arbitrary/SetArbitrary.js');12const { dictionary } = require('fast-check/lib/check/arbitrary/DictionaryArbitrary.js');13const { date } = require('fast-check/lib/check/arbitrary/DateArbitrary.js');14const { double } = require('fast-check/lib/check/arbitrary/DoubleArbitrary.js');15const { integer } = require('fast-check/lib/check/arbitrary/IntegerArbitrary.js');16const { bigInt } = require('fast-check/lib/check/arbitrary/BigIntArbitrary.js');17const { bigUintN } = require('fast-check/lib/check/arbitrary/BigUintNArbitrary.js');18const { unicodeString } = require('fast-check/lib/check/arbitrary/UnicodeStringArbitrary.js');19const { unicodeJsonString } = require('fast-check/lib/check/arbitrary/UnicodeJsonStringArbitrary.js');20const { char } = require('fast-check/lib/check/arbitrary/CharArbitrary.js');21const { fullUnicode } = require('fast-check/lib/check/arbitrary/FullUnicodeArbitrary.js');22const { fullUnicodeJson } = require('fast-check/lib/check/arbitrary/FullUnicodeJsonArbitrary.js');23const { char16bits } = require('fast-check/lib/check/arbitrary/Char16bitsArbitrary.js');24const { char16bitsJson } = require('fast-check/lib/check/arbitrary/Char16bitsJsonArbitrary.js');25const { char32bits } = require('fast-check/lib/check/arbitrary/Char32bitsAr

Using AI Code Generation

1const { mapToConstantBuilder } = require('fast-check');2const { constant } = require('fast-check');3const { property } = require('fast-check');4const mapToConstant = mapToConstantBuilder(constant);5const isEven = (n) => {6  return n % 2 === 0;7};8const isOdd = (n) => {9  return n % 2 === 1;10};11const isEvenOrOdd = (n) => {12  return isEven(n) || isOdd(n);13};14property(mapToConstant(isEvenOrOdd), isEven).check();

Using AI Code Generation

1const { mapToConstantBuilder } = require('fast-check');2const mapToConstant = mapToConstantBuilder();3const constant = mapToConstant('constant');4const fc = require('fast-check');5fc.assert(6  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {7    return a + b === c;8  })9);10fc.assert(11  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {12    return a + b === c;13  })14);15const myConstant = mapToConstant('constant');16fc.assert(17  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {18    return a + b === c;19  })20);21const myConstant2 = mapToConstant('constant');22fc.assert(23  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {24    return a + b === c;25  })26);27const { mapToConstantBuilder } = require('fast-check');28const mapToConstant = mapToConstantBuilder();29const constant = mapToConstant('constant');30const fc = require('fast-check');31fc.assert(32  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {33    return a + b === c;34  })35);36fc.assert(37  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {38    return a + b === c;39  })40);41const myConstant = mapToConstant('constant');42fc.assert(43  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {44    return a + b === c;45  })46);47const myConstant2 = mapToConstant('constant');48fc.assert(49  fc.property(fc.nat(), fc.nat(), fc.nat(), (a, b, c) => {50    return a + b === c;51  })52);53const { mapToConstantBuilder } = require('fast-check');54const mapToConstant = mapToConstantBuilder();55const constant = mapToConstant('constant');56const fc = require('fast-check');57fc.assert(58  fc.property(fc.nat(), fc.nat(), fc.nat(),

Using AI Code Generation

1const fc = require("fast-check");2const { mapToConstantBuilder } = require("fast-check");3const { constant } = require("fast-check");4const { option } = require("fast-check");5const myArb = fc.string();6const myConstant = "test";7const myArb2 = mapToConstantBuilder(myArb, myConstant);8fc.assert(9  fc.property(myArb2, (value) => {10    return value === myConstant;11  })12);13const fc = require("fast-check");14const { mapToConstant } = require("fast-check");15const { constant } = require("fast-check");16const { option } = require("fast-check");17const myArb = fc.string();18const myConstant = "test";19fc.assert(20  fc.property(mapToConstant(myArb, myConstant), (value) => {21    return value === myConstant;22  })23);24const fc = require("fast-check");25const { mapToConstant } = require("fast-check");26const { constant } = require("fast-check");27const { option } = require("fast-check");28const myArb = fc.string();29const myConstant = "test";30fc.assert(31  fc.property(mapToConstant(myArb, myConstant), (value) => {32    return value === myConstant;33  })34);35const fc = require("fast-check");36const { mapToConstant } = require("fast-check");37const { constant } = require("fast-check");38const { option } = require("fast-check");39const myArb = fc.string();40const myConstant = "test";41fc.assert(42  fc.property(mapToConstant(myArb, myConstant), (value) => {43    return value === myConstant;44  })45);46const fc = require("fast-check");47const { mapToConstant } = require("fast-check");48const { constant } = require("fast-check");49const { option } = require("fast-check");50const myArb = fc.string();51const myConstant = "test";52fc.assert(53  fc.property(map

Using AI Code Generation

1import { mapToConstantBuilder } from '@dubzzz/fast-check';2const map = mapToConstantBuilder();3const result = map([['a', 1], ['b', 2], ['c', 3]]);4console.log(result);5const result = mapToConstantBuilder()([6  { key: 'a', value: 1 },7  { key: 'b', value: 2 },8  { key: 'c', value: 3 },9]);10console.log(result);11const result = mapToConstantBuilder()([12  { key: 'a', value: 1 },13  { key: 'b', value: 2 },14  { key: 'c', value: 3 },15]);16console.log(result);17const result = mapToConstantBuilder()([18  { key: 'a', value: 1 },19  { key: 'b', value: 2 },20  { key: 'c', value: 3 },21]);22console.log(result);23const result = mapToConstantBuilder()([24  { key: 'a', value: 1 },25  { key: 'b', value: 2 },26  { key: 'c', value: 3 },27]);28console.log(result);29const result = mapToConstantBuilder()([30  { key: 'a', value: 1 },31  { key: 'b', value: 2 },32  { key: 'c', value: 3 },33]);34console.log(result);

Using AI Code Generation

1const { mapToConstantBuilder } = require('../lib/arbitrary/mapToConstant.js');2const { constantFrom } = require('fast-check');3const mapToConstant = mapToConstantBuilder(constantFrom('a', 'b', 'c'));4const fc = require('fast-check');5fc.assert(6  fc.property(mapToConstant(fc.string()), (s) => {7    return s === 'a' || s === 'b' || s === 'c';8  })9);10const mapToConstant = mapToConstantBuilder(constantFrom('a', 'b', 'c'));11const fc = require('fast-check');12fc.assert(13  fc.property(mapToConstant(fc.string()), (f) => {14    return f() === 'a' || f() === 'b' || f() === 'c';15  })16);

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