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": {

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