How to use tempShrinkable method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

NoStackOverflowOnShrink.spec.ts

Source:NoStackOverflowOnShrink.spec.ts

1import * as fc from '../../src/fast-check';2import { seed } from './seed';3import * as prand from 'pure-rand';4const computeMaximalStackSize = () => {5  // Compute the maximal call stack size6  let depth = 0;7  const f = () => {8    ++depth;9    f();10  };11  try {12    f();13  } catch (_err) {14    // throws 'RangeError: Maximum call stack size exceeded'15  }16  return depth;17};18const callStackSize = computeMaximalStackSize();19const callStackSizeWithMargin = 2 * callStackSize;20// Configure arbitraries and provide them with a maximal length much greater than the default one21// This value is hardcoded in order to avoid variations from one env to another and ease replays in case of problem22const maxDepthForArrays = 40000;23// Not all the shrunk values of a given generated value will be asked24// The aim is to check if asking for the first maxShrinksToAsk might trigger unwanted stack overflows25const maxShrinksToAsk = 100;26describe(`NoStackOverflowOnShrink (seed: ${seed})`, () => {27  const iterateOverShrunkValues = <T>(arb: fc.Arbitrary<T>, v: fc.Value<T>) => {28    const it = arb.shrink(v.value_, v.context).take(maxShrinksToAsk)[Symbol.iterator]();29    let cur = it.next();30    while (!cur.done) {31      cur = it.next();32    }33  };34  it('should not run into stack overflow during very deep shrink tasks', () => {35    // We expect the depth used by this test to be greater than36    // the maximal depth we computed before reaching a stack overflow37    expect(maxDepthForArrays).toBeGreaterThan(callStackSizeWithMargin);38    class InfiniteShrinkingDepth extends fc.Arbitrary<number> {39      generate(_mrng: fc.Random): fc.Value<number> {40        return new fc.Value(0, undefined);41      }42      canShrinkWithoutContext(value: unknown): value is number {43        return false;44      }45      shrink(value: number): fc.Stream<fc.Value<number>> {46        if (value <= -maxDepthForArrays) {47          return fc.Stream.nil();48        }49        return fc.Stream.of(new fc.Value(value - 1, undefined));50      }51    }52    const out = fc.check(53      fc.property(new InfiniteShrinkingDepth(), (_n) => false),54      { seed }55    );56    expect(out.failed).toBe(true);57    expect(out.counterexamplePath).toBe([...Array(maxDepthForArrays + 1)].map(() => '0').join(':'));58  });59  it('should not run into stack overflow while calling shrink on very large arrays', () => {60    // We expect the depth used by this test to be greater than61    // the maximal depth we computed before reaching a stack overflow62    expect(maxDepthForArrays).toBeGreaterThan(callStackSizeWithMargin);63    const mrng = new fc.Random(prand.xorshift128plus(seed));64    const arb = fc.array(fc.boolean(), { maxLength: maxDepthForArrays, size: 'max' });65    let value: fc.Value<boolean[]> | null = null;66    while (value === null) {67      const tempShrinkable = arb.generate(mrng, undefined);68      if (tempShrinkable.value.length >= callStackSize) {69        value = tempShrinkable;70      }71    }72    expect(() => iterateOverShrunkValues(arb, value!)).not.toThrow();73  });74  it('should not run into stack overflow while calling shrink on very large shuffled sub-arrays', () => {75    // We expect the depth used by this test to be greater than76    // the maximal depth we computed before reaching a stack overflow77    expect(maxDepthForArrays).toBeGreaterThan(callStackSizeWithMargin);78    const mrng = new fc.Random(prand.xorshift128plus(seed));79    const arb = fc.shuffledSubarray([...Array(maxDepthForArrays)].map((_, i) => i));80    let value: fc.Value<number[]> | null = null;81    while (value === null) {82      const tempShrinkable = arb.generate(mrng, undefined);83      if (tempShrinkable.value.length >= callStackSize) {84        value = tempShrinkable;85      }86    }87    expect(() => iterateOverShrunkValues(arb, value!)).not.toThrow();88  });89  it('should not run into stack overflow while calling shrink on very large arrays of commands', () => {90    // We expect the depth used by this test to be greater than91    // the maximal depth we computed before reaching a stack overflow92    expect(maxDepthForArrays).toBeGreaterThan(callStackSizeWithMargin);93    class AnyCommand implements fc.Command<Record<string, unknown>, unknown> {94      constructor(readonly b: boolean) {}95      check = () => true;96      run = () => {};97    }98    const mrng = new fc.Random(prand.xorshift128plus(seed));99    const arb = fc.commands([fc.boolean().map((b) => new AnyCommand(b))], {100      maxCommands: maxDepthForArrays,101      size: 'max',102    });103    let value: fc.Value<Iterable<fc.Command<Record<string, unknown>, unknown>>> | null = null;104    while (value === null) {105      const tempShrinkable = arb.generate(mrng, undefined);106      const cmds = [...tempShrinkable.value];107      if (cmds.length >= callStackSize) {108        fc.modelRun(() => ({ model: {}, real: {} }), cmds);109        value = tempShrinkable;110      }111    }112    expect(() => iterateOverShrunkValues(arb, value!)).not.toThrow();113  });...

Using AI Code Generation

1const {tempShrinkable} = require('fast-check');2const {shrinkString} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');3const {shrinkNumber} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');4const {shrinkObject} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');5const {shrinkArray} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');6const shrunkString = tempShrinkable(shrinkString, 'hello');7const shrunkNumber = tempShrinkable(shrinkNumber, 10);8const shrunkObject = tempShrinkable(shrinkObject, {a: 1, b: 2, c: 3});9const shrunkArray = tempShrinkable(shrinkArray, [1, 2, 3, 4, 5]);10console.log(shrunkString);11console.log(shrunkNumber);12console.log(shrunkObject);13console.log(shrunkArray);14const {tempShrinkable} = require('fast-check');15const {shrinkString} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');16const {shrinkNumber} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');17const {shrinkObject} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');18const {shrinkArray} = require('fast-check/lib/arbitrary/_internals/helpers/Shrinkable');19const shrunkString = tempShrinkable(shrinkString, 'hello');20const shrunkNumber = tempShrinkable(shrinkNumber, 10);21const shrunkObject = tempShrinkable(shrinkObject, {a: 1, b: 2, c: 3});22const shrunkArray = tempShrinkable(shrinkArray, [1, 2, 3, 4, 5]);23test('shrunkString should be a string', () => {24  expect(typeof shrunkString).toBe('string');25});26test('shrunkNumber should be a number', () => {27  expect(typeof shrunkNumber).toBe('number

Using AI Code Generation

1const { tempShrinkable } = require("fast-check");2console.log("tempShrinkable(1):", tempShrinkable(1));3console.log("tempShrinkable(3):", tempShrinkable(3));4console.log("tempShrinkable(5):", tempShrinkable(5));5console.log("tempShrinkable(7):", tempShrinkable(7));6const { tempShrinkable } = require("fast-check");7console.log("tempShrinkable(1):", tempShrinkable(1));8console.log("tempShrinkable(3):", tempShrinkable(3));9console.log("tempShrinkable(5):", tempShrinkable(5));10console.log("tempShrinkable(7):", tempShrinkable(7));11const { tempShrinkable } = require("fast-check");12console.log("tempShrinkable(1):", tempShrinkable(1));13console.log("tempShrinkable(3):", tempShrinkable(3));14console.log("tempShrinkable(5):", tempShrinkable(5));15console.log("tempShrinkable(7):", tempShrinkable(7));

Using AI Code Generation

1const fc = require("fast-check");2const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/Shrinkable");3const arb = fc.constantFrom(1, 2, 3);4for (let i = 0; i < 5; i++) {5  const s = tempShrinkable(arb.generate(mrng()), false);6  console.log(s.value);7  console.log(s.shrink().map((s) => s.value));8}9const fc = require("fast-check");10const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/Shrinkable");11const arb = fc.constantFrom(1, 2, 3);12for (let i = 0; i < 5; i++) {13  const s = tempShrinkable(arb.generate(mrng()), false);14  console.log(s.value);15  console.log(s.shrink().map((s) => s.value));16}17const fc = require("fast-check");18const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/Shrinkable");19const arb = fc.constantFrom(1, 2, 3);20for (let i = 0; i < 5; i++) {21  const s = tempShrinkable(arb.generate(mrng()), false);22  console.log(s.value);23  console.log(s.shrink().map((s) => s.value));24}25const fc = require("fast-check");26const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/Shrinkable");27const arb = fc.constantFrom(1, 2, 3);28for (let i = 0; i < 5; i++) {29  const s = tempShrinkable(arb.generate(mrng()), false);30  console.log(s.value);31  console.log(s.shrink().map((s) => s.value));32}33const fc = require("fast-check");34const {

Using AI Code Generation

1const fc = require("fast-check");2const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/TempShrinkable.js");3test("tempShrinkable", () => {4  const arb = fc.nat();5  const shrinkable = arb.generate(mrng());6  const tempShrinkable1 = tempShrinkable(shrinkable);7  expect(tempShrinkable1.value).toEqual(shrinkable.value);8  expect(tempShrinkable1.context).toEqual(shrinkable.context);9  expect(tempShrinkable1.shrink).toEqual(shrinkable.shrink);10});11const fc = require("fast-check");12const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/TempShrinkable.js");13test("tempShrinkable", () => {14  const arb = fc.nat();15  const shrinkable = arb.generate(mrng());16  const tempShrinkable1 = tempShrinkable(shrinkable);17  expect(tempShrinkable1.value).toEqual(shrinkable.value);18  expect(tempShrinkable1.context).toEqual(shrinkable.context);19  expect(tempShrinkable1.shrink).toEqual(shrinkable.shrink);20});21const fc = require("fast-check");22const { tempShrinkable } = require("fast-check/lib/check/arbitrary/definition/TempShrinkable.js");23test("tempShrinkable", () => {24  const arb = fc.nat();25  const shrinkable = arb.generate(mrng());26  const tempShrinkable1 = tempShrinkable(shrinkable);27  expect(tempShrinkable1.value).toEqual(shrinkable.value);28  expect(tempShrinkable1.context).toEqual(shrinkable.context);29  expect(tempShrinkable1.shrink).toEqual(shrinkable.shrink);30});

Using AI Code Generation

1const { tempShrinkable } = require('fast-check');2const shrinkable = tempShrinkable(42);3console.log(shrinkable.value);4const { tempShrinkable } = require('fast-check');5const shrinkable = tempShrinkable(42, () => tempShrinkable(24));6console.log(shrinkable.value);7const { tempShrinkable } = require('fast-check');8const shrinkable = tempShrinkable(42, () => tempShrinkable(24));9console.log(shrinkable.value);10console.log(shrinkable.shrink().value);11const { tempShrinkable } = require('fast-check');12const shrinkable = tempShrinkable(42, () => tempShrinkable(24));13console.log(shrinkable.value);14console.log(shrinkable.shrink().value);15console.log(shrinkable.shrink().shrink().value);16const { tempShrinkable } = require('fast-check');17const shrinkable = tempShrinkable(42, () => tempShrinkable(42));18console.log(shrinkable.value);

Using AI Code Generation

1const fc = require('fast-check');2const {tempShrinkable} = fc;3const {shrinkable} = fc;4const {integer} = fc;5const s = shrinkable(1);6const t = tempShrinkable(integer(), 1);

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