KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use expectedArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

oneof.spec.ts

Source:oneof.spec.ts

1import * as fc from 'fast-check';2import { oneof, OneOfConstraints } from '../../../src/arbitrary/oneof';3import { fakeArbitrary } from './__test-helpers__/ArbitraryHelpers';4import * as FrequencyArbitraryMock from '../../../src/arbitrary/_internals/FrequencyArbitrary';5import { sizeArb } from './__test-helpers__/SizeHelpers';6function beforeEachHook() {7  jest.resetModules();8  jest.restoreAllMocks();9  fc.configureGlobal({ beforeEach: beforeEachHook });10}11beforeEach(beforeEachHook);12describe('oneof', () => {13  it('should adapt received MaybeWeightedArbitrary for FrequencyArbitrary.from when called with constraints', () => {14    fc.assert(15      fc.property(16        fc.record(17          {18            withCrossShrink: fc.boolean(),19            depthIdentifier: fc.string(),20            depthSize: fc.oneof(fc.double({ min: 0, noNaN: true }), sizeArb),21            maxDepth: fc.nat(),22          },23          { requiredKeys: [] }24        ),25        fc.option(fc.nat()),26        fc.option(fc.nat()),27        fc.option(fc.nat()),28        (constraints: Partial<OneOfConstraints>, weight1, weight2, weight3) => {29          // Arrange30          const expectedArb = fakeArbitrary().instance;31          const from = jest.spyOn(FrequencyArbitraryMock.FrequencyArbitrary, 'from');32          from.mockReturnValue(expectedArb);33          const { instance: arb1 } = fakeArbitrary();34          const { instance: arb2 } = fakeArbitrary();35          const { instance: arb3 } = fakeArbitrary();36          // Act37          const out = oneof(38            constraints,39            weight1 !== null ? { arbitrary: arb1, weight: weight1 } : arb1,40            weight2 !== null ? { arbitrary: arb2, weight: weight2 } : arb2,41            weight3 !== null ? { arbitrary: arb3, weight: weight3 } : arb342          );43          // Assert44          expect(from).toHaveBeenCalledWith(45            [46              { arbitrary: arb1, weight: weight1 !== null ? weight1 : 1 },47              { arbitrary: arb2, weight: weight2 !== null ? weight2 : 1 },48              { arbitrary: arb3, weight: weight3 !== null ? weight3 : 1 },49            ],50            constraints,51            'fc.oneof'52          );53          expect(out).toBe(expectedArb);54        }55      )56    );57  });58  it('should adapt received MaybeWeightedArbitrary for FrequencyArbitrary.from when called without constraints', () => {59    fc.assert(60      fc.property(fc.option(fc.nat()), fc.option(fc.nat()), fc.option(fc.nat()), (weight1, weight2, weight3) => {61        // Arrange62        const expectedArb = fakeArbitrary().instance;63        const from = jest.spyOn(FrequencyArbitraryMock.FrequencyArbitrary, 'from');64        from.mockReturnValue(expectedArb);65        const { instance: arb1 } = fakeArbitrary();66        const { instance: arb2 } = fakeArbitrary();67        const { instance: arb3 } = fakeArbitrary();68        // Act69        const out = oneof(70          weight1 !== null ? { arbitrary: arb1, weight: weight1 } : arb1,71          weight2 !== null ? { arbitrary: arb2, weight: weight2 } : arb2,72          weight3 !== null ? { arbitrary: arb3, weight: weight3 } : arb373        );74        // Assert75        expect(from).toHaveBeenCalledWith(76          [77            { arbitrary: arb1, weight: weight1 !== null ? weight1 : 1 },78            { arbitrary: arb2, weight: weight2 !== null ? weight2 : 1 },79            { arbitrary: arb3, weight: weight3 !== null ? weight3 : 1 },80          ],81          {}, // empty constraints82          'fc.oneof'83        );84        expect(out).toBe(expectedArb);85      })86    );87  });...

memo.spec.ts

Source:memo.spec.ts

1import { memo } from '../../../src/arbitrary/memo';2import { fakeArbitrary } from './__test-helpers__/ArbitraryHelpers';3import { fakeRandom } from './__test-helpers__/RandomHelpers';4describe('memo', () => {5  it('should return the produced instance of arbitrary', () => {6    // Arrange7    const { instance: expectedArb } = fakeArbitrary();8    const builder = memo(() => expectedArb);9    // Act10    const arb = builder();11    // Assert12    expect(arb).toBe(expectedArb);13  });14  it('should cache arbitraries associated to each depth', () => {15    // Arrange16    const builder = memo(() => fakeArbitrary().instance);17    // Act18    const arb = builder();19    // Assert20    expect(builder(10)).toBe(builder(10));21    expect(builder(42)).toBe(builder(42));22    expect(builder(65500)).toBe(builder(65500));23    expect(builder()).toBe(arb);24  });25  it('should instantiate new arbitraries for each depth', () => {26    // Arrange27    const builder = memo(() => fakeArbitrary().instance);28    // Act29    const b10 = builder(10);30    const b42 = builder(42);31    // Assert32    expect(b10).not.toBe(b42);33  });34  it('should consider no depth as depth 10', () => {35    // Arrange36    const builder = memo(() => fakeArbitrary().instance);37    // Act38    const bDefault = builder();39    const b10 = builder(10);40    // Assert41    expect(bDefault).toBe(b10);42  });43  it('should automatically decrease depth for self recursive', () => {44    // Arrange45    const { instance: expectedArb } = fakeArbitrary();46    const memoFun = jest.fn();47    const builder = memo(memoFun);48    memoFun.mockImplementation((n) => (n <= 6 ? expectedArb : builder()));49    // Act50    builder();51    // Assert52    expect(memoFun.mock.calls).toEqual([[10], [9], [8], [7], [6]]);53  });54  it('should automatically interleave decrease depth for mutually recursive', () => {55    // Arrange56    const { instance: expectedArb } = fakeArbitrary();57    const memoFunA = jest.fn();58    const memoFunB = jest.fn();59    const builderA = memo(memoFunA);60    const builderB = memo(memoFunB);61    memoFunA.mockImplementation((n) => (n <= 6 ? expectedArb : builderB()));62    memoFunB.mockImplementation((n) => (n <= 6 ? expectedArb : builderA()));63    // Act64    builderA();65    // Assert66    expect(memoFunA.mock.calls).toEqual([[10], [8], [6]]);67    expect(memoFunB.mock.calls).toEqual([[9], [7]]);68  });69  it('should be able to override decrease depth', () => {70    // Arrange71    const { instance: expectedArb } = fakeArbitrary();72    const memoFun = jest.fn();73    const builder = memo(memoFun);74    memoFun.mockImplementation((n) => (n <= 0 ? expectedArb : builder(n - 3)));75    // Act76    builder();77    // Assert78    expect(memoFun.mock.calls).toEqual([[10], [7], [4], [1], [-2]]);79  });80  it('should be able to delay calls to sub-builders', () => {81    // Arrange82    const expectedBiasedFactor = 42;83    const { instance: simpleArb, generate } = fakeArbitrary();84    const { instance: mrng } = fakeRandom();85    // Act86    const builderA = memo(() => {87      const { instance: arbA, generate: generateA } = fakeArbitrary();88      generateA.mockImplementation((mrng, biasedFactor) => builderB().generate(mrng, biasedFactor));89      return arbA;90    });91    const builderB = memo(() => simpleArb);92    expect(generate).not.toHaveBeenCalled();93    builderA().generate(mrng, expectedBiasedFactor);94    // Assert95    expect(generate).toHaveBeenCalledWith(mrng, expectedBiasedFactor);96  });...

arb-handler.js

Source:arb-handler.js

1const assert = require('assert');2const fs = require('fs');3const arbHandler = require('../arb-handler');4const xlfHandler = require('../xlf-handler');5describe('ArbHandler', () => {6    const expectedArb = fs.readFileSync('arb-handler-save1.expected.arb', { encoding: 'utf-8' });7    it('Merges as JSON', () => {8        const input1 = fs.readFileSync('arb1.arb');9        const input2 = fs.readFileSync('arb2.arb');10        const units = [...arbHandler.createParser(input1).parse(), ...arbHandler.createParser(input2).parse()];11        const json = arbHandler.save(units, 'de');12        assert.strictEqual(json, expectedArb);13    });14    it('Converts from XLF', () => {15        const input1 = fs.readFileSync('xlf1.xlf');16        const input2 = fs.readFileSync('xlf2.xlf');17        const units = [...xlfHandler.createParser(input1).parse(), ...xlfHandler.createParser(input2).parse()];18        const json = arbHandler.save(units, 'de');19        assert.strictEqual(json, expectedArb);20    });...

Using AI Code Generation

1import {expectedArb} from 'fast-check-monorepo';2import {expectedArb} from 'fast-check-monorepo';3import {expectedArb} from 'fast-check-monorepo';4import {expectedArb} from 'fast-check-monorepo';5import {expectedArb} from 'fast-check-monorepo';6import {expectedArb} from 'fast-check-monorepo';7import {expectedArb} from 'fast-check-monorepo';8import {expectedArb} from 'fast-check-monorepo';9import {expectedArb} from 'fast-check-monorepo';10import {expectedArb} from 'fast-check-monorepo';11import {expectedArb} from 'fast-check-monorepo';12import {expectedArb} from 'fast-check-monorepo';13import {expectedArb} from 'fast-check-monorepo';14import {expectedAr

Using AI Code Generation

1const expectedArb = require('fast-check-monorepo').expectedArb;2const fc = require('fast-check');3const { expect } = require('chai');4describe('test', () => {5  it('should pass', () => {6    fc.assert(fc.property(fc.integer(), (i) => {7      expect(i).to.equal(i);8    }));9  });10  it('should fail', () => {11    fc.assert(fc.property(expectedArb, (i) => {12      expect(i).to.equal(i);13    }));14  });15});

Using AI Code Generation

1const fc = require('fast-check');2const { expectedArb } = require('fast-check-monorepo');3const { expect } = require('chai');4describe('expectedArb', () => {5  it('should return an expected value', () => {6    fc.assert(fc.property(expectedArb(1), (value) => {7      expect(value).to.equal(1);8    }));9  });10});

Using AI Code Generation

1const { expectedArb } = require('fast-check');2const { testProp } = require('ava-fast-check');3testProp('test', [expectedArb], (t, expected) => {4  t.true(expected >= 0);5});6{7  "scripts": {8  },9  "devDependencies": {10  }11}

Using AI Code Generation

1import { expectedArb } from 'fast-check-monorepo';2describe('test', () => {3  it('test', () => {4    const arb = expectedArb(0);5    expect(arb.generate()).toEqual(0);6  });7});8import * as fastCheckMonorepo from 'fast-check-monorepo';9describe('test', () => {10  it('test', () => {11    const arb = fastCheckMonorepo.expectedArb(0);12    expect(arb.generate()).toEqual(0);13  });14});

Using AI Code Generation

1const { expectedArb } = require('fast-check');2const { array } = require('fast-check/lib/arbitrary/array.js');3const { integer } = require('fast-check/lib/arbitrary/integer.js');4const myArray = array(integer(0, 10), 1, 5);5const expected = expectedArb(myArray);6const { array } = require('fast-check/lib/arbitrary/array.js');7const { integer } = require('fast-check/lib/arbitrary/integer.js');8const myArray = array(integer(0, 10), 1, 5);9const expected = [0, 5];10test('test myArray', () => {11  expect(myArray).toEqual(expected);12});13const { array } = require('fast-check/lib/arbitrary/array.js');14const { integer } = require('fast-check/lib/arbitrary/integer.js');15const myArray = array(integer(0, 10), 1, 5);16const expected = [0, 5];17test('test myArray', () => {18  expect(myArray().value).toEqual(expected);19});20const { array } = require('fast-check/lib/arbitrary/array.js');21const { integer } = require('fast-check/lib/arbitrary/integer.js');22const myArray = array(integer(0, 10), 1, 5);23const expected = [0, 5];24test('test myArray', () => {25  expect(myArray().value).toEqual(expected);26});

Using AI Code Generation

1const {expectedArb} = require('fast-check-monorepo');2const arb = expectedArb();3arb.generate(mrng);4const {expectedArb} = require('fast-check');5const arb = expectedArb();6arb.generate(mrng);7expectedArb()8const arb = expectedArb();

Using AI Code Generation

1const { expectedArb } = require('fast-check-monorepo');2const { property } = require('fast-check');3const expected = expectedArb(100, 200);4property(expected, (e) => {5  console.log(e);6});7{8  "dependencies": {

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.