How to use afterEqualValue method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

base64String.spec.ts

Source:base64String.spec.ts

1import * as fc from 'fast-check';2import { base64String } from '../../../src/arbitrary/base64String';3import {4  assertProduceValuesShrinkableWithoutContext,5  assertProduceCorrectValues,6  assertProduceSameValueGivenSameSeed,7} from './__test-helpers__/ArbitraryAssertions';8import * as ArrayMock from '../../../src/arbitrary/array';9import { fakeArbitrary } from './__test-helpers__/ArbitraryHelpers';10import { Value } from '../../../src/check/arbitrary/definition/Value';11import { buildShrinkTree, renderTree } from './__test-helpers__/ShrinkTree';12import { sizeForArbitraryArb } from './__test-helpers__/SizeHelpers';13function beforeEachHook() {14  jest.resetModules();15  jest.restoreAllMocks();16  fc.configureGlobal({ beforeEach: beforeEachHook });17}18beforeEach(beforeEachHook);19describe('base64String', () => {20  it('should accept any constraints accepting at least one length multiple of 4', () =>21    fc.assert(22      fc.property(23        fc.nat({ max: 5 }),24        fc.integer({ min: 3, max: 30 }),25        fc.boolean(),26        fc.boolean(),27        (min, gap, withMin, withMax) => {28          // Arrange29          const constraints = { minLength: withMin ? min : undefined, maxLength: withMax ? min + gap : undefined };30          // Act / Assert31          expect(() => base64String(constraints)).not.toThrowError();32        }33      )34    ));35  it('should reject any constraints not accepting at least one length multiple of 4', () =>36    fc.assert(37      fc.property(fc.nat({ max: 30 }), fc.nat({ max: 2 }), (min, gap) => {38        // Arrange39        const constraints = { minLength: min, maxLength: min + gap };40        let includesMultipleOf4 = false;41        for (let acceptedLength = constraints.minLength; acceptedLength <= constraints.maxLength; ++acceptedLength) {42          includesMultipleOf4 = includesMultipleOf4 || acceptedLength % 4 === 0;43        }44        fc.pre(!includesMultipleOf4);45        // Act / Assert46        expect(() => base64String(constraints)).toThrowError();47      })48    ));49  it('should always query for arrays that will produce length fitting the requested range', () =>50    fc.assert(51      fc.property(52        fc.nat({ max: 30 }),53        fc.integer({ min: 3, max: 30 }),54        fc.boolean(),55        fc.boolean(),56        (min, gap, withMin, withMax) => {57          // Arrange58          const constraints = { minLength: withMin ? min : undefined, maxLength: withMax ? min + gap : undefined };59          const array = jest.spyOn(ArrayMock, 'array');60          const { instance: arrayInstance, map } = fakeArbitrary();61          array.mockReturnValue(arrayInstance);62          map.mockReturnValue(arrayInstance); // fake map63          // Act64          base64String(constraints);65          // Assert66          expect(array).toHaveBeenCalledTimes(1);67          const constraintsOnArray = array.mock.calls[0][1]!;68          const rounded4 = (value: number) => {69            switch (value % 4) {70              case 0:71                return value;72              case 1:73                return value;74              case 2:75                return value + 2;76              case 3:77                return value + 1;78            }79          };80          if (constraints.minLength !== undefined) {81            expect(constraintsOnArray.minLength).toBeDefined();82            expect(rounded4(constraintsOnArray.minLength!)).toBeGreaterThanOrEqual(constraints.minLength);83          }84          if (constraints.maxLength !== undefined) {85            expect(constraintsOnArray.maxLength).toBeDefined();86            expect(rounded4(constraintsOnArray.maxLength!)).toBeLessThanOrEqual(constraints.maxLength);87          }88          if (constraintsOnArray.minLength !== undefined && constraintsOnArray.maxLength !== undefined) {89            expect(constraintsOnArray.maxLength).toBeGreaterThanOrEqual(constraintsOnArray.minLength);90          }91        }92      )93    ));94  it('should always forward constraints on size to the underlying arbitrary when provided', () =>95    fc.assert(96      fc.property(97        fc.nat({ max: 5 }),98        fc.integer({ min: 3, max: 30 }),99        fc.boolean(),100        fc.boolean(),101        sizeForArbitraryArb,102        (min, gap, withMin, withMax, size) => {103          // Arrange104          const constraints = {105            minLength: withMin ? min : undefined,106            maxLength: withMax ? min + gap : undefined,107            size,108          };109          const array = jest.spyOn(ArrayMock, 'array');110          const { instance: arrayInstance, map } = fakeArbitrary();111          array.mockReturnValue(arrayInstance);112          map.mockReturnValue(arrayInstance); // fake map113          // Act114          base64String(constraints);115          // Assert116          expect(array).toHaveBeenCalledWith(expect.anything(), expect.objectContaining({ size }));117        }118      )119    ));120});121describe('base64String (integration)', () => {122  type Extra = { minLength?: number; maxLength?: number };123  const extraParameters: fc.Arbitrary<Extra> = fc124    .tuple(fc.nat({ max: 30 }), fc.integer({ min: 3, max: 30 }), fc.boolean(), fc.boolean())125    .map(([min, gap, withMin, withMax]) => ({126      minLength: withMin ? min : undefined,127      // Minimal gap=3 to ensure we have at least one possible multiple of 4 between min and max128      maxLength: withMax ? min + gap : undefined,129    }));130  const isCorrect = (value: string, extra: Extra) => {131    if (extra.minLength !== undefined) {132      expect(value.length).toBeGreaterThanOrEqual(extra.minLength);133    }134    if (extra.maxLength !== undefined) {135      expect(value.length).toBeLessThanOrEqual(extra.maxLength);136    }137    const padStart = value.indexOf('=');138    const beforeEqualValue = value.substr(0, padStart === -1 ? value.length : padStart);139    const afterEqualValue = value.substr(padStart === -1 ? value.length : padStart);140    for (const c of beforeEqualValue.split('')) {141      expect('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/'.split('')).toContainEqual(c);142    }143    expect(['', '=', '==']).toContainEqual(afterEqualValue);144  };145  const base64StringBuilder = (extra: Extra) => base64String(extra);146  it('should produce the same values given the same seed', () => {147    assertProduceSameValueGivenSameSeed(base64StringBuilder, { extraParameters });148  });149  it('should only produce correct values', () => {150    assertProduceCorrectValues(base64StringBuilder, isCorrect, { extraParameters });151  });152  it('should produce values seen as shrinkable without any context', () => {153    assertProduceValuesShrinkableWithoutContext(base64StringBuilder, { extraParameters });154  });155  // assertShrinkProducesSameValueWithoutInitialContext is not applicable for base64String has some values will not shrink exactly the same way.156  // For instance: 'abcde' will be mapped to 'abcd', with default shrink it will try to shrink from 'abcde'. With context-less one it will start from 'abcd'.157  it.each`158    source                               | constraints159    ${'0123ABC==' /* invalid base 64 */} | ${{}}160    ${'AB==' /* not large enough */}     | ${{ minLength: 5 }}161    ${'0123AB==' /* too large */}        | ${{ maxLength: 7 }}162  `('should not be able to generate $source with fc.base64String($constraints)', ({ source, constraints }) => {163    // Arrange / Act164    const arb = base64String(constraints);165    const out = arb.canShrinkWithoutContext(source);166    // Assert167    expect(out).toBe(false);168  });169  it.each`170    rawValue171    ${'ABCD'}172    ${'0123AB=='}173    ${'01230123012301230123AB=='}174    ${'ABCD'.repeat(50)}175  `('should be able to shrink $rawValue', ({ rawValue }) => {176    // Arrange177    const arb = base64String();178    const value = new Value(rawValue, undefined);179    // Act180    const renderedTree = renderTree(buildShrinkTree(arb, value, { numItems: 100 })).join('\n');181    // Assert182    expect(arb.canShrinkWithoutContext(rawValue)).toBe(true);183    expect(renderedTree).toMatchSnapshot();184  });...

Using AI Code Generation

1const fc = require('fast-check');2const { afterEqualValue } = require('fast-check-monorepo');3fc.assert(4  fc.property(5    fc.array(fc.integer()),6    afterEqualValue((x, y) => x > y, (x, y) => x < y),7);

Using AI Code Generation

1const fc = require('fast-check');2const { afterEqualValue } = require('fast-check-monorepo');3  .array(fc.integer())4  .filter(afterEqualValue((a, b) => a.length === b.length));5fc.assert(fc.property(myArb, myArb, (a, b) => a.length === b.length));6const fc = require('fast-check');7const { afterEqualValue } = require('fast-check-monorepo');8  .array(fc.integer())9  .filter(afterEqualValue((a, b) => a.length === b.length));10fc.assert(fc.property(myArb, myArb, (a, b) => a.length === b.length));11const fc = require('fast-check');12const { afterEqualValue } = require('fast-check-monorepo');13  .array(fc.integer())14  .filter(afterEqualValue((a, b) => a.length === b.length));15fc.assert(fc.property(myArb, myArb, (a, b) => a.length === b.length));16const fc = require('fast-check');17const { afterEqualValue } = require('fast-check-monorepo');18  .array(fc.integer())19  .filter(afterEqualValue((a, b) => a.length === b.length));20fc.assert(fc.property(myArb, myArb, (a, b) => a.length === b.length));21const fc = require('fast-check');22const { afterEqualValue } = require('fast-check-monorepo');23  .array(fc.integer())24  .filter(afterEqualValue((a, b) => a.length === b.length));25fc.assert(fc.property(myArb, myArb, (a, b) => a.length === b.length));

Using AI Code Generation

1import { afterEqualValue } from "fast-check-monorepo/packages/arbitrary-helpers/src/after-equal-value";2const array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];3const array2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];4const array3 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];5const afterEqualValueArray = afterEqualValue(array, 5);6const afterEqualValueArray2 = afterEqualValue(array2, 5);7const afterEqualValueArray3 = afterEqualValue(array3, 5);8console.log(afterEqualValueArray);9console.log(afterEqualValueArray2);10console.log(afterEqualValueArray3);

Using AI Code Generation

1const fc = require('fast-check');2const { afterEqualValue } = require('fast-check-monorepo');3const fc = require('fast-check');4fc.assert(5  fc.property(6    fc.array(fc.integer(), 1),7    afterEqualValue((a, b) => a === b)8);9const fc = require('fast-check');10const { afterEqualValue } = require('fast-check-monorepo');11const fc = require('fast-check');12fc.assert(13  fc.property(14    fc.array(fc.integer(), 1),15    afterEqualValue((a, b) => a === b)16);

Using AI Code Generation

1const { afterEqualValue } = require('fast-check-monorepo')2const { testProp, fc } = require('fast-check')3testProp(4  [fc.nat(), fc.nat()],5  (m, n) => {6    return afterEqualValue(m, n)7  },8  { verbose: true }9{10}

Using AI Code Generation

1const { afterValue } = require('fast-check-monorepo');2const { afterValue } = require('fast-check-monorepo');3describe('afterValue', () => {4  it('should generate values after the given value', () => {5    const value = 1;6    const { value: generatedValue } = afterValue(value).generate(mrng());7    expect(generatedValue).toBeGreaterThan(value);8  });9});10{11  "scripts": {12  },13  "dependencies": {14  },15  "devDependencies": {16  }17}18module.exports = {19  collectCoverageFrom: ['src/**/*.{js,jsx}'],20  testMatch: ['**/__tests__/**/*.js?(x)', '**/?(*.)+(spec|test).js?(x)'],21  transform: {22  },23};

Using AI Code Generation

1const { afterEqualValue } = require('fast-check-monorepo');2const fc = require('fast-check');3const { afterValue } = require('fast-check');4const { after } = require('fast-check');5const { before } = require('fast-check');6const { beforeValue } = require('fast-check');7const { between } = require('fast-check');8const { betweenValue } = require('fast-check');9const { constantFrom } = require('fast-check');10const { double } = require('fast-check');11const { frequency } = require('fast-check');12const { fullUnicode } = require('fast-check');13const { integer } = require('fast-check');14const { oneof } = require('fast-check');15const { option } = require('fast-check');16const { record } = require('fast-check');17const { set } from('fast-check');18const { tuple } = require('fast-check');19const { unicode } = require('fast-check');20const { unicodeJsonObject } = require('fast-check');21const { unicodeJsonPair } = require('fast-check');22const { unicodeJsonString } = require('fast-check');23const { unicodeJsonStringify } = require('fast-check');24const { unicodeJsonValue } = require('fast-check');25const { unicodeJsonObject } = require('fast-check');26const { unicodeJsonPair } = require('fast-check');27const { unicodeJsonString } = require('fast-check');28const { unicodeJsonStringify } = require('fast-check');29const { unicodeJsonValue } = require('fast-check');30const { unicodeJsonArray } = require('fast-check');31const { unicodeJsonArrayContent } = requi

Using AI Code Generation

1import { afterEqualValue } from 'fast-check';2import { afterEqualValue as afterEqualValue2 } from 'fast-check-monorepo';3const test = () => {4  const a = afterEqualValue(1, 2);5  const b = afterEqualValue2(1, 2);6  console.log(a);7  console.log(b);8};9test();10{11  "compilerOptions": {12  },13}14{15  "scripts": {16  },17  "dependencies": {18  }19}20{21  "dependencies": {22    "fast-check": {23      "requires": {

Using AI Code Generation

1const { afterEqualValue } = require('fast-check-monorepo');2const { record, string, number, array, constant, option } = require('fast-check');3const arb = record({4  name: string(),5  age: number(),6  hobbies: array(string()),7  address: option(string()),8});9const afterEqualValueArb = afterEqualValue(arb, (a, b) => {10  return a.name === b.name && a.age === b.age;11});

Using AI Code Generation

1const {afterEqualValue} = require('./index');2const fc = require('fast-check');3const {add} = require('./add');4fc.assert(5  fc.property(fc.integer(), fc.integer(), (a, b) => {6    return afterEqualValue(() => add(a, b), () => add(b, a));7  })8);9console.log("test.js: Done");

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