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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);

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