How to use shrinkInteger method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

ShrinkInteger.spec.ts

Source:ShrinkInteger.spec.ts

...4  it('should always return empty stream when current equals target', () =>5    fc.assert(6      fc.property(fc.maxSafeInteger(), fc.boolean(), (value, tryAsap) => {7        // Arrange / Act8        const shrinks = [...shrinkInteger(value, value, tryAsap)];9        // Assert10        expect(shrinks).toHaveLength(0);11      })12    ));13  it('should always starts stream with target when try asap is requested (when current not target)', () =>14    fc.assert(15      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), (current, target) => {16        // Arrange17        fc.pre(current !== target);18        // Act19        const shrinks = [...shrinkInteger(current, target, true)];20        // Assert21        expect(shrinks).not.toHaveLength(0);22        expect(shrinks[0].value).toBe(target);23        expect(shrinks[0].context).toBe(undefined);24      })25    ));26  it('should only include values between current and target in the stream', () =>27    fc.assert(28      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), fc.boolean(), (current, target, tryAsap) => {29        // Arrange / Act30        const shrinks = [...shrinkInteger(current, target, tryAsap)];31        const values = shrinks.map((v) => v.value);32        // Assert33        for (const v of values) {34          expect(v).toBeGreaterThanOrEqual(Math.min(current, target));35          expect(v).toBeLessThanOrEqual(Math.max(current, target));36        }37      })38    ));39  it('should never include current in the stream', () =>40    fc.assert(41      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), fc.boolean(), (current, target, tryAsap) => {42        // Arrange / Act43        const shrinks = [...shrinkInteger(current, target, tryAsap)];44        const values = shrinks.map((v) => v.value);45        // Assert46        expect(values).not.toContain(current);47      })48    ));49  it('should never include target in the stream when try asap is not requested', () =>50    fc.assert(51      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), (current, target) => {52        // Arrange / Act53        const shrinks = [...shrinkInteger(current, target, false)];54        const values = shrinks.map((v) => v.value);55        // Assert56        expect(values).not.toContain(target);57      })58    ));59  it('should always set context to be the value of previous entry in the stream', () =>60    fc.assert(61      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), fc.boolean(), (current, target, tryAsap) => {62        // Arrange / Act63        const shrinks = [...shrinkInteger(current, target, tryAsap)];64        // Assert65        for (let idx = 1; idx < shrinks.length; ++idx) {66          expect(shrinks[idx].context).toBe(shrinks[idx - 1].value);67        }68      })69    ));70  it('should specify first context of the stream to target if and only if no try asap, undefined otherwise', () =>71    fc.assert(72      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), fc.boolean(), (current, target, tryAsap) => {73        // Arrange74        const expectedFirstContext = tryAsap ? undefined : target;75        // Act76        const first = shrinkInteger(current, target, tryAsap).getNthOrLast(0);77        // Assert78        if (first !== null) {79          expect(first.context).toBe(expectedFirstContext);80        }81      })82    ));83  if (typeof BigInt === 'undefined') {84    return;85  }86  it('should always strictly increase distance from target as we move in the stream', () =>87    fc.assert(88      fc.property(fc.maxSafeInteger(), fc.maxSafeInteger(), fc.boolean(), (current, target, tryAsap) => {89        // Arrange / Act90        const shrinks = [...shrinkInteger(current, target, tryAsap)];91        const absDiff = (a: number, b: number): bigint => {92          const result = BigInt(a) - BigInt(b);93          return result >= 0 ? result : -result;94        };95        // Assert96        for (let idx = 1; idx < shrinks.length; ++idx) {97          const previousDistance = absDiff(shrinks[idx - 1].value, target);98          const currentDistance = absDiff(shrinks[idx].value, target);99          expect(currentDistance).toBeGreaterThan(previousDistance);100        }101      })102    ));...

integer.ts

Source:integer.ts

...42    //     ? 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({53        sample: sampleInteger,54        biased: biasInteger,55        shrink: shrinkInteger,56        constraints: {57            min,58            max,59        },60    })...

Using AI Code Generation

1const {shrinkInteger} = require('fast-check');2const {shrinkNumber} = require('fast-check');3const {shrinkString} = require('fast-check');4const {shrinkBoolean} = require('fast-check');5const {shrinkObject} = require('fast-check');6const {shrinkArray} = require('fast-check');7const {shrinkMap} = require('fast-check');8const {shrinkSet} = require('fast-check');9const {shrinkDate} = require('fast-check');10const {shrinkSymbol} = require('fast-check');11const {shrinkBigInt} = require('fast-check');12const {shrinkFunction} = require('fast-check');13const {shrinkConstant} = require('fast-check');14const {shrinkConstantFrom} = require('fast-check');15const {shrinkObjectConstraints} = require('fast-check');16const {shrinkArrayConstraints} = require('fast-check');17const {shrinkMapConstraints} = require('fast-check');18const {shrinkSetConstraints} = require('fast-check');19const {shrinkDateConstraints} = require('fast-check');20const {shrinkSymbolConstraints} = require('fast-check');21const {shrinkBigIntConstraints} = require('fast-check');22const {shrinkFunctionConstraints} = require('fast-check');23const {shrinkConstantConstraints} = require('fast-check');24const {shrinkConstantFromConstraints} = require('fast-check');25const {shrinkSubarray} = require('fast-check');26const {shrinkSubarrayConstraints} = require('fast-check');27const {shrinkTuple} = require('fast-check');28const {shrinkTupleConstraints} = require('fast-check');29const {shrinkObjectConstraints} = require('fast-check');30const {shrinkArrayConstraints} = require('fast-check');31const {shrinkMapConstraints} = require('fast-check');32const {shrinkSetConstraints} = require('fast-check');33const {shrinkDateConstraints} = require('fast-check');34const {shrinkSymbolConstraints} = require('fast-check');35const {shrinkBigIntConstraints} = require('fast-check');36const {shrinkFunctionConstraints} = require('fast-check');37const {shrinkConstantConstraints} = require('fast-check');38const {shrinkConstantFromConstraints} = require('fast-check');39const {shrinkSubarray} = require('fast-check');40const {

Using AI Code Generation

1const { shrinkInteger } = require('fast-check');2const shrunk = shrinkInteger(42);3console.log(shrunk);4const { shrinkInteger } = require('fast-check/lib/arbitrary/shrinkInteger');5const shrunk = shrinkInteger(42);6console.log(shrunk);7const { shrinkInteger } = require('fast-check/lib/arbitrary/shrinkInteger');8const shrunk = shrinkInteger(42);9console.log(shrunk);10const { shrinkInteger } = require('fast-check/lib/arbitrary/shrinkInteger');11const shrunk = shrinkInteger(42);12console.log(shrunk);13const { shrinkInteger } = require('fast-check/lib/arbitrary/shrinkInteger');14const shrunk = shrinkInteger(42);15console.log(shrunk);16const { shrinkInteger } = require('fast-check/lib/arbitrary/shrinkInteger');17const shrunk = shrinkInteger(42);18console.log(shrunk);

Using AI Code Generation

1import { shrinkInteger } from "fast-check";2const shrunk = shrinkInteger(10);3console.log(shrunk);4import { shrinkInteger } from "fast-check";5const shrunk = shrinkInteger(10);6console.log(shrunk);7import { shrinkInteger } from "fast-check-monorepo";8const shrunk = shrinkInteger(10);9console.log(shrunk);10import { shrinkInteger } from "fast-check-monorepo";11const shrunk = shrinkInteger(10);12console.log(shrunk);

Using AI Code Generation

1const { shrinkInteger } = require("fast-check");2const data = shrinkInteger(10);3console.log(data);4const { shrinkInteger } = require("fast-check");5const data = shrinkInteger(10);6console.log(data);7const { shrinkInteger } = require("fast-check");8const data = shrinkInteger(10);9console.log(data);10const { shrinkInteger } = require("fast-check");11const data = shrinkInteger(10);12console.log(data);13const { shrinkInteger } = require("fast-check");14const data = shrinkInteger(10);15console.log(data);16const { shrinkInteger } = require("fast-check");17const data = shrinkInteger(10);18console.log(data);19const { shrinkInteger } = require("fast-check");20const data = shrinkInteger(10);21console.log(data);

Using AI Code Generation

1const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');2console.log(result);3const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');4console.log(result);5const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');6console.log(result);7const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');8console.log(result);9const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');10console.log(result);11const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');12console.log(result);13const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');14console.log(result);15const { shrinkInteger } = require('fast-check/lib/arbitrary/ShrinkInteger');16console.log(result);

Using AI Code Generation

1const { shrinkInteger } = require('fast-check');2const shrinked = shrinkInteger(42);3console.log(shrinked);4const { shrinkInteger } = require('fast-check-monorepo');5const shrinked = shrinkInteger(42);6console.log(shrinked);

Using AI Code Generation

1const { shrinkInteger } = require('fast-check');2const { shrunken } = shrinkInteger( 0, 100, 1000);3console.log(shrunken);4const { shrinkString } = require('fast-check');5const { shrunken } = shrinkString( 'abc');6console.log(shrunken);7const { shrinkArray } = require('fast-check');8const { shrunken } = shrinkArray( shrinkInteger, [ 1, 2, 3]);9console.log(shrunken);10const { shrinkObject } = require('fast-check');11const { shrunken } = shrinkObject( { a: 1, b: 2, c: 3});12console.log(shrunken);13const { shrinkDate } = require('fast-check');14const { shrunken } = shrinkDate( new Date());15console.log(shrunken);

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