Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use integerLogLike method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

BiasNumericRange.spec.ts

Source:BiasNumericRange.spec.ts

1import * as fc from 'fast-check';2import {3  biasNumericRange,4  bigIntLogLike,5  integerLogLike,6} from '../../../../../src/arbitrary/_internals/helpers/BiasNumericRange';7describe('biasNumericRange', () => {8  it('should bias close to extreme values and zero if min and max have opposite signs', () =>9    fc.assert(10      fc.property(11        fc.integer({ min: Number.MIN_SAFE_INTEGER, max: -1 }),12        fc.integer({ min: 1, max: Number.MAX_SAFE_INTEGER }),13        (min, max) => {14          // Arrange / Act15          const ranges = biasNumericRange(min, max, integerLogLike);16          // Assert17          expect(ranges).toHaveLength(3);18          expect(ranges).toEqual([19            { min: expect.toBeWithinRange(min, 0), max: expect.toBeWithinRange(0, max) }, // close to zero20            { min: expect.toBeWithinRange(0, max), max: max }, // close to max21            { min: min, max: expect.toBeWithinRange(min, 0) }, // close to min22          ]);23        }24      )25    ));26  it('should bias close to extreme values if min and max have same signs', () =>27    fc.assert(28      fc.property(29        fc.constantFrom(1, -1),30        fc.integer({ min: 0, max: Number.MAX_SAFE_INTEGER }),31        fc.integer({ min: 0, max: Number.MAX_SAFE_INTEGER }),32        (sign, minRaw, maxRaw) => {33          // Arrange34          fc.pre(minRaw !== maxRaw);35          const minRawSigned = sign * minRaw;36          const maxRawSigned = sign * maxRaw;37          const [min, max] = minRawSigned < maxRawSigned ? [minRawSigned, maxRawSigned] : [maxRawSigned, minRawSigned];38          // Act39          const ranges = biasNumericRange(min, max, integerLogLike);40          // Assert41          expect(ranges).toHaveLength(2);42          const closeToMin = { min: expect.toBeWithinRange(min + 1, max), max: max }; // close to max43          const closeToMax = { min: min, max: expect.toBeWithinRange(min, max - 1) }; // close to min44          if (sign > 0) expect(ranges).toEqual([closeToMax, closeToMin]);45          else expect(ranges).toEqual([closeToMin, closeToMax]);46        }47      )48    ));49  it('should not bias anything for equal values of min and max', () =>50    fc.assert(51      fc.property(fc.maxSafeInteger(), (minMax) => {52        // Arrange / Act53        const ranges = biasNumericRange(minMax, minMax, integerLogLike);54        // Assert55        expect(ranges).toHaveLength(1);56        expect(ranges).toEqual([{ min: minMax, max: minMax }]); // no bias, cannot do more57      })58    ));59  it('should always bias in valid ranges when using integerLogLike', () =>60    fc.assert(61      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), (a, b) => {62        // Arrange63        const min = a < b ? a : b;64        const max = a < b ? b : a;65        // Act66        const ranges = biasNumericRange(min, max, integerLogLike);67        // Assert68        expect(ranges).not.toHaveLength(0);69        for (const range of ranges) {70          expect(range.max).toBeGreaterThanOrEqual(range.min);71          expect(min).toBeLessThanOrEqual(range.max);72          expect(max).toBeGreaterThanOrEqual(range.max);73          expect(min).toBeLessThanOrEqual(range.min);74          expect(max).toBeGreaterThanOrEqual(range.min);75        }76      })77    ));78  if (typeof BigInt !== 'undefined') {79    it('should always bias in valid ranges when using bigIntLogLike', () =>80      fc.assert(81        fc.property(fc.bigInt(), fc.bigInt(), (a, b) => {82          // Arrange83          const min = a < b ? a : b;84          const max = a < b ? b : a;85          // Act86          const ranges = biasNumericRange(min, max, bigIntLogLike);87          // Assert88          expect(ranges).not.toHaveLength(0);89          for (const range of ranges) {90            expect(range.max).toBeGreaterThanOrEqual(range.min);91            expect(min).toBeLessThanOrEqual(range.max);92            expect(max).toBeGreaterThanOrEqual(range.max);93            expect(min).toBeLessThanOrEqual(range.min);94            expect(max).toBeGreaterThanOrEqual(range.min);95          }96        })97      ));98  }99});100// Helpers101expect.extend({102  toBeWithinRange(received, floor, ceiling): jest.CustomMatcherResult {103    const pass = received >= floor && received <= ceiling && !Number.isNaN(received);104    return {105      message: () => `expected ${received} ${pass ? 'not ' : ''} to be within range ${floor} - ${ceiling}`,106      pass,107    };108  },109});110declare global {111  // eslint-disable-next-line @typescript-eslint/no-namespace112  namespace jest {113    interface Expect {114      toBeWithinRange(a: number, b: number): CustomMatcherResult;115    }116  }...

integer.ts

Source:integer.ts

...12    [2, ({ logMin, logMax }: IntegerConstraints & { logMin: number; logMax: number }) => ({ min: -logMin, max: logMax })],13    [1, ({ logMax, max }: IntegerConstraints & { logMin: number; logMax: number }) => ({ min: max - logMax, max })],14    [1, ({ logMin, min }: IntegerConstraints & { logMin: number; logMax: number }) => ({ min, max: min + logMin })],15])16export function integerLogLike(v: number): number {17    return Math.floor(Math.log(v))18}19export function sampleInteger({ min, max }: IntegerConstraints, { rng }: ArbitraryContext): number {20    return Math.floor(rng.sample() * (max - min) + min)21}22export function biasInteger({ min, max }: IntegerConstraints, { rng, bias }: BiasedArbitraryContext): IntegerConstraints {23    if (min === max) {24        return { min, max }25    } else if (min < 0 && max > 0) {26        // min < 0 && max > 027        const logMin = integerLogLike(-min) * bias28        const logMax = integerLogLike(max) * bias29        return nearZeroBias(rng.sample())({ min, max, logMin, logMax })30    }31    // // Either min < 0 && max <= 032    // // Or min >= 0, so max >= 033    const length = (max - min) * bias34    const choices = weightedChoice([35        [1, { min, max: Math.floor(min + length) }],36        [1, { min: Math.floor(max - length), max }],37    ])38    // const logGap = integerLogLike((max - min) as any) // max-min !== 039    // const arbCloseToMin = new Ctor(min, max, min, (min as any) + logGap) // close to min40    // const arbCloseToMax = new Ctor(min, max, (max - logGap) as any, max) // close to max41    // return min < 042    //     ? new BiasedNumericArbitrary(arbCloseToMax, arbCloseToMin) // max is closer to zero43    //     : new BiasedNumericArbitrary(arbCloseToMin, arbCloseToMax) // min is closer to zero44    return choices(rng.sample())45}46export function shrinkInteger({ min, max }: IntegerConstraints, x: number): Tree<number> {47    const destination = min <= 0 && max >= 0 ? 0 : min < 0 ? max : min48    return expandTree((v) => towards(v, destination), tree(x, [tree(destination)]))49}50export function integer(constraints: RelaxedPartial<IntegerConstraints> = {}): Integrated<IntegerConstraints, number> {51    const { min = -Math.pow(2, 31), max = Math.pow(2, 31) } = constraints52    return makeIntegrated({...

Using AI Code Generation

1const fc = require('fast-check')2const { integerLogLike } = require('fast-check-monorepo')3fc.assert(4  fc.property(5    integerLogLike(),6    (x) => {7      console.log(x)8    },9    { verbose: true }10const fc = require('fast-check')11const { integerLogLike } = require('fast-check-monorepo')12fc.assert(13  fc.property(14    integerLogLike(),15    (x) => {16      console.log(x)17    },18    { verbose: true }

Using AI Code Generation

1const fc = require('fast-check');2const { integerLogLike } = require('fast-check-monorepo');3fc.assert(fc.property(fc.integerLogLike(0, 100), (n) => {4  return n >= 0 && n <= 100;5}));6const fc = require('fast-check');7const { integerLogLike } = require('fast-check-monorepo');8fc.assert(fc.property(fc.integerLogLike(0, 100), (n) => {9  return n >= 0 && n <= 100;10}));

Using AI Code Generation

1const { integerLogLike } = require('integer-log-like');2const fc = require('fast-check');3const arb = integerLogLike({4});5fc.assert(fc.property(arb, (value) => {6  console.log(value);7  return true;8}));

Using AI Code Generation

1const fc = require('fast-check');2function integerLogLike(x) {3  if (x <= 1) {4    return 0;5  }6  return Math.log(x) / Math.log(2);7}8const prop = fc.property(fc.integer(), (x) => {9  return integerLogLike(x) === Math.floor(Math.log2(x));10});11fc.assert(prop, { seed: 42, path: 'test3.js', endOnFailure: true, verbose: 1 });

Using AI Code Generation

1const fc = require('fast-check');2const { integerLogLike } = require('fast-check-monorepo');3console.log(integerLogLike(0, 10, 1));4const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));5console.log(randomInt);6console.log(integerLogLike(0, 10, 1));7const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));8console.log(randomInt);9console.log(integerLogLike(0, 10, 1));10const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));11console.log(randomInt);12console.log(integerLogLike(0, 10, 1));13const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));14console.log(randomInt);15console.log(integerLogLike(0, 10, 1));16const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));17console.log(randomInt);18console.log(integerLogLike(0, 10, 1));19const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));20console.log(randomInt);21console.log(integerLogLike(0, 10, 1));22const randomInt = fc.sample(fc.integerLogLike(0, 10, 1));23console.log(randomInt);24console.log(integerLogLike(0, 10, 1));

Using AI Code Generation

1const integerLogLike = require('fast-check-monorepo').integerLogLike;2const intLogLike = integerLogLike(10, 5);3console.log(intLogLike);4const integerLogLike = require('fast-check-monorepo').integerLogLike;5const intLogLike = integerLogLike(10, 5);6console.log(intLogLike);7const integerLogLike = require('fast-check-monorepo').integerLogLike;8const intLogLike = integerLogLike(10, 5);9console.log(intLogLike);10const integerLogLike = require('fast-check-monorepo').integerLogLike;11const intLogLike = integerLogLike(10, 5);12console.log(intLogLike);13const integerLogLike = require('fast-check-monorepo').integerLogLike;14const intLogLike = integerLogLike(10, 5);15console.log(intLogLike);16const integerLogLike = require('fast-check-monorepo').integerLogLike;17const intLogLike = integerLogLike(10, 5);18console.log(intLogLike);19const integerLogLike = require('fast-check-monorepo').integerLogLike;20const intLogLike = integerLogLike(10, 5);21console.log(intLogLike);

Using AI Code Generation

1const fc = require('fast-check');2const integerLogLike = (min, max, logLike) => {3    if (min > max) {4        throw new Error('min must be less than or equal to max');5    }6    if (min === max) {7        return fc.constant(min);8    }9    const minLogLike = logLike(min);10    const maxLogLike = logLike(max);11    const logLikeRange = maxLogLike - minLogLike;12    const logLikeDiff = (n) => logLike(n) - minLogLike;13    return fc.integer(min, max).map((n) => {14        const logLikeDiffN = logLikeDiff(n);15        const logLikeDiffNp1 = logLikeDiff(n + 1);16        const logLikeDiffNp2 = logLikeDiff(n + 2);17        const logLikeDiffNp3 = logLikeDiff(n + 3);18        const logLikeDiffNp4 = logLikeDiff(n + 4);19        const logLikeDiffNp5 = logLikeDiff(n + 5);20        const logLikeDiffNp6 = logLikeDiff(n + 6);21        const logLikeDiffNp7 = logLikeDiff(n + 7);22        const logLikeDiffNp8 = logLikeDiff(n + 8);23        const logLikeDiffNp9 = logLikeDiff(n + 9);24        const logLikeDiffNp10 = logLikeDiff(n + 10);25        const logLikeDiffNp11 = logLikeDiff(n + 11);26        const logLikeDiffNp12 = logLikeDiff(n + 12);27        const logLikeDiffNp13 = logLikeDiff(n + 13);28        const logLikeDiffNp14 = logLikeDiff(n + 14);29        const logLikeDiffNp15 = logLikeDiff(n + 15);

Using AI Code Generation

1const fc = require('fast-check');2const options = {bias: 0.5};3const intLog = fc.integerLogLike(options);4const intLog2 = fc.integerLogLike();5const intLog3 = fc.integerLogLike({bias: 0.1});6const intLog4 = fc.integerLogLike({bias: 0.9});7const options2 = {bias: 0.5, min: 1, max: 10};8const intLog5 = fc.integerLogLike(options2);

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.