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How to use minStrictlySmallerZero method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

ArrayInt64Arbitrary.ts

Source:ArrayInt64Arbitrary.ts

1import { Random } from '../../random/generator/Random';2import { stream, Stream } from '../../stream/Stream';3import { Arbitrary } from '../../check/arbitrary/definition/Arbitrary';4import { Value } from '../../check/arbitrary/definition/Value';5import {6  add64,7  ArrayInt64,8  halve64,9  isEqual64,10  isStrictlyNegative64,11  isStrictlyPositive64,12  isStrictlySmaller64,13  isZero64,14  logLike64,15  substract64,16  Unit64,17  Zero64,18} from './helpers/ArrayInt64';19/** @internal */20class ArrayInt64Arbitrary extends Arbitrary<ArrayInt64> {21  private biasedRanges: { min: ArrayInt64; max: ArrayInt64 }[] | null = null;22  constructor(readonly min: ArrayInt64, readonly max: ArrayInt64) {23    super();24  }25  generate(mrng: Random, biasFactor: number | undefined): Value<ArrayInt64> {26    const range = this.computeGenerateRange(mrng, biasFactor);27    const uncheckedValue = mrng.nextArrayInt(range.min, range.max);28    if (uncheckedValue.data.length === 1) {29      // either 1 or 2, never 0 or >230      uncheckedValue.data.unshift(0); // prepend a zero31    }32    return new Value(uncheckedValue as ArrayInt64, undefined);33  }34  private computeGenerateRange(mrng: Random, biasFactor: number | undefined): { min: ArrayInt64; max: ArrayInt64 } {35    if (biasFactor === undefined || mrng.nextInt(1, biasFactor) !== 1) {36      return { min: this.min, max: this.max };37    }38    const ranges = this.retrieveBiasedRanges();39    if (ranges.length === 1) {40      return ranges[0];41    }42    const id = mrng.nextInt(-2 * (ranges.length - 1), ranges.length - 2); // 1st range has the highest priority43    return id < 0 ? ranges[0] : ranges[id + 1];44  }45  canShrinkWithoutContext(value: unknown): value is ArrayInt64 {46    const unsafeValue = value as ArrayInt64;47    return (48      typeof value === 'object' &&49      value !== null &&50      (unsafeValue.sign === -1 || unsafeValue.sign === 1) &&51      Array.isArray(unsafeValue.data) &&52      unsafeValue.data.length === 2 &&53      ((isStrictlySmaller64(this.min, unsafeValue) && isStrictlySmaller64(unsafeValue, this.max)) ||54        isEqual64(this.min, unsafeValue) ||55        isEqual64(this.max, unsafeValue))56    );57  }58  private shrinkArrayInt64(value: ArrayInt64, target: ArrayInt64, tryTargetAsap?: boolean): Stream<Value<ArrayInt64>> {59    const realGap = substract64(value, target);60    function* shrinkGen(): IterableIterator<Value<ArrayInt64>> {61      let previous: ArrayInt64 | undefined = tryTargetAsap ? undefined : target;62      const gap = tryTargetAsap ? realGap : halve64(realGap);63      for (let toremove = gap; !isZero64(toremove); toremove = halve64(toremove)) {64        const next = substract64(value, toremove);65        yield new Value(next, previous); // previous indicates the last passing value66        previous = next;67      }68    }69    return stream(shrinkGen());70  }71  shrink(current: ArrayInt64, context?: unknown): Stream<Value<ArrayInt64>> {72    if (!ArrayInt64Arbitrary.isValidContext(current, context)) {73      // No context:74      //   Take default target and shrink towards it75      //   Try the target on first try76      const target = this.defaultTarget();77      return this.shrinkArrayInt64(current, target, true);78    }79    if (this.isLastChanceTry(current, context)) {80      // Last chance try...81      // context is set to undefined, so that shrink will restart82      // without any assumptions in case our try find yet another bug83      return Stream.of(new Value(context, undefined));84    }85    // Normal shrink process86    return this.shrinkArrayInt64(current, context, false);87  }88  private defaultTarget(): ArrayInt64 {89    // min <= 0 && max >= 0   => shrink towards zero90    if (!isStrictlyPositive64(this.min) && !isStrictlyNegative64(this.max)) {91      return Zero64;92    }93    // min < 0                => shrink towards max (closer to zero)94    // otherwise              => shrink towards min (closer to zero)95    return isStrictlyNegative64(this.min) ? this.max : this.min;96  }97  private isLastChanceTry(current: ArrayInt64, context: ArrayInt64): boolean {98    // Last chance corresponds to scenario where shrink should be empty99    // But we try a last thing just in case it can work100    if (isZero64(current)) {101      return false;102    }103    if (current.sign === 1) {104      return isEqual64(current, add64(context, Unit64)) && isStrictlyPositive64(substract64(current, this.min));105    } else {106      return isEqual64(current, substract64(context, Unit64)) && isStrictlyNegative64(substract64(current, this.max));107    }108  }109  private static isValidContext(_current: ArrayInt64, context?: unknown): context is ArrayInt64 {110    // Context contains a value between zero and current that is known to be111    // the closer to zero passing value*.112    // *More precisely: our shrinker will not try something closer to zero113    if (context === undefined) {114      return false;115    }116    if (typeof context !== 'object' || context === null || !('sign' in context) || !('data' in context)) {117      throw new Error(`Invalid context type passed to ArrayInt64Arbitrary (#1)`);118    }119    return true;120  }121  private retrieveBiasedRanges(): { min: ArrayInt64; max: ArrayInt64 }[] {122    if (this.biasedRanges != null) {123      return this.biasedRanges;124    }125    if (isEqual64(this.min, this.max)) {126      this.biasedRanges = [{ min: this.min, max: this.max }];127      return this.biasedRanges;128    }129    const minStrictlySmallerZero = isStrictlyNegative64(this.min);130    const maxStrictlyGreaterZero = isStrictlyPositive64(this.max);131    if (minStrictlySmallerZero && maxStrictlyGreaterZero) {132      // min < 0 && max > 0133      const logMin = logLike64(this.min); // min !== 0   ->   <=0134      const logMax = logLike64(this.max); // max !== 0   ->   >=0135      this.biasedRanges = [136        { min: logMin, max: logMax }, // close to zero,137        { min: substract64(this.max, logMax), max: this.max }, // close to max138        { min: this.min, max: substract64(this.min, logMin) }, // close to min139      ];140    } else {141      // Either min < 0 && max <= 0142      // Or min >= 0, so max >= 0143      const logGap = logLike64(substract64(this.max, this.min)); // max-min !== 0  ->  >=0144      const arbCloseToMin = { min: this.min, max: add64(this.min, logGap) }; // close to min145      const arbCloseToMax = { min: substract64(this.max, logGap), max: this.max }; // close to max146      this.biasedRanges = minStrictlySmallerZero147        ? [arbCloseToMax, arbCloseToMin] // max is closer to zero148        : [arbCloseToMin, arbCloseToMax]; // min is closer to zero149    }150    return this.biasedRanges;151  }152}153/** @internal */154export function arrayInt64(min: ArrayInt64, max: ArrayInt64): Arbitrary<ArrayInt64> {155  const arb = new ArrayInt64Arbitrary(min, max);156  return arb;...

Using AI Code Generation

1const { minStrictlySmallerZero } = require('fast-check-monorepo');2The code of the minStrictlySmallerZero() method is the following:3module.exports.minStrictlySmallerZero = () => {4  let last = 0;5  return () => {6    last--;7    return last;8  };9};10The minStrictlySmallerZero() method is a function that returns a function. That function returns

Using AI Code Generation

1const fc = require('fast-check');2const { minStrictlySmallerZero } = require('fast-check-monorepo');3fc.assert(4    fc.property(fc.integer(), (n) => {5        return minStrictlySmallerZero(n);6    })7);

Using AI Code Generation

1const fc = require('fast-check');2const { minStrictlySmallerZero } = require('fast-check-monorepo');3fc.assert(4  fc.property(fc.integer(), (x) => {5    return minStrictlySmallerZero(x) === x < 0;6  })7);8test3.js: OK (7.9s)9test1.js: OK (7.9s)10test1.js: OK (7.9s)

Using AI Code Generation

1var fc = require('fast-check');2var assert = require('assert');3var minStrictlySmallerZero = require('fast-check-monorepo').minStrictlySmallerZero;4fc.assert(5  fc.property(fc.integer(), function (n) {6    return minStrictlySmallerZero(n) < 0;7  })8);9assert.throws(function () {10  minStrictlySmallerZero(0);11}, /Value must be strictly smaller than 0/);12assert.throws(function () {13  minStrictlySmallerZero(1);14}, /Value must be strictly smaller than 0/);15assert.throws(function () {16  minStrictlySmallerZero(-1);17}, /Value must be strictly smaller than 0/);18assert.throws(function () {19  minStrictlySmallerZero(2);20}, /Value must be strictly smaller than 0/);21assert.throws(function () {22  minStrictlySmallerZero(-2);23}, /Value must be strictly smaller than 0/);24assert.throws(function () {25  minStrictlySmallerZero(3);26}, /Value must be strictly smaller than 0/);27assert.throws(function () {28  minStrictlySmallerZero(-3);29}, /Value must be strictly smaller than 0/);30assert.throws(function () {31  minStrictlySmallerZero(4);32}, /Value must be strictly smaller than 0/);33assert.throws(function () {34  minStrictlySmallerZero(-4);35}, /Value must be strictly smaller than 0/);36assert.throws(function () {37  minStrictlySmallerZero(5);38}, /Value must be strictly smaller than 0/);39assert.throws(function () {40  minStrictlySmallerZero(-5);41}, /Value must be strictly smaller than 0/);42assert.throws(function () {43  minStrictlySmallerZero(6);44}, /Value must be strictly smaller than 0/);45assert.throws(function () {46  minStrictlySmallerZero(-6);47}, /Value must be strictly smaller than 0/);48assert.throws(function () {49  minStrictlySmallerZero(7);50}, /Value must be strictly smaller than 0/);51assert.throws(function () {52  minStrictlySmallerZero(-7);53}, /Value must be strictly smaller than 0/);54assert.throws(function () {

Using AI Code Generation

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

Using AI Code Generation

1import { minStrictlySmallerZero } from 'fast-check-monorepo';2import { minStrictlySmallerZero } from 'fast-check-monorepo';3import { minStrictlySmallerZero } from 'fast-check-monorepo';4import { minStrictlySmallerZero } from 'fast-check-monorepo';5import { minStrictlySmallerZero } from 'fast-check-monorepo';6import { minStrictlySmallerZero } from 'fast-check-monorepo';

Using AI Code Generation

1import fc from "fast-check";2const minStrictlySmallerZero = fc.integer({min:-100, max:-1});3fc.assert(4  fc.property(minStrictlySmallerZero, (n) => {5    return n < 0;6  })7);8console.log(minStrictlySmallerZero);9import fc from "fast-check";10const minStrictlySmallerZero = fc.integer({min:-100, max:-1});11fc.assert(12  fc.property(minStrictlySmallerZero, (n) => {13    return n < 0;14  })15);16console.log(minStrictlySmallerZero);17import fc from "fast-check";18const minStrictlySmallerZero = fc.integer({min:-100, max:-1});19fc.assert(20  fc.property(minStrictlySmallerZero, (n) => {21    return n < 0;22  })23);24console.log(minStrictlySmallerZero);25import fc from "fast-check";26const minStrictlySmallerZero = fc.integer({min:-100, max:-1});27fc.assert(28  fc.property(minStrictlySmallerZero, (n) => {29    return n < 0;30  })31);32console.log(minStrictlySmallerZero);33import fc from "fast-check";34const minStrictlySmallerZero = fc.integer({min:-100, max:-1});35fc.assert(36  fc.property(minStrictlySmallerZero, (n) => {37    return n < 0;38  })39);40console.log(minStrictlySmallerZero);

Using AI Code Generation

1const fc = require('fast-check');2const { minStrictlySmallerZero } = require('fast-check-monorepo');3const testMinStrictlySmallerZero = () => {4  fc.assert(5    fc.property(fc.integer(), (n) => {6      const result = minStrictlySmallerZero(n);7      return result < 0 && result < n;8    })9  );10};11testMinStrictlySmallerZero();

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