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How to use UndefinedContextPlaceholder method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

NoUndefinedAsContext.spec.ts

Source:NoUndefinedAsContext.spec.ts

1import {2  noUndefinedAsContext,3  UndefinedContextPlaceholder,4} from '../../../../../src/arbitrary/_internals/helpers/NoUndefinedAsContext';5import { Value } from '../../../../../src/check/arbitrary/definition/Value';6describe('noUndefinedAsContext', () => {7  it('should never alter value if context is not undefined', () => {8    // Arrange9    const value = new Value(1, 'my-context');10    // Act11    const out = noUndefinedAsContext(value);12    // Assert13    expect(out).toBe(value);14  });15  it('should never alter value if context is not undefined even if cloneable', () => {16    // Arrange17    const value = new Value(1, 'my-context', () => 2);18    // Act19    const out = noUndefinedAsContext(value);20    // Assert21    expect(out).toBe(value);22    expect(value.hasToBeCloned).toBe(true); // sanity check23  });24  it('should create a new value with same underlying but defined context whenever context is undefined', () => {25    // Arrange26    const value = new Value(1, undefined);27    // Act28    const out = noUndefinedAsContext(value);29    // Assert30    expect(out).not.toBe(value);31    expect(out.value).toBe(value.value);32    expect(out.context).toBe(UndefinedContextPlaceholder);33    expect(out.hasToBeCloned).toBe(value.hasToBeCloned);34  });35  it('should create a new value with same underlying but defined context whenever context is undefined even if cloneable', () => {36    // Arrange37    const value = new Value(1, undefined, () => 2);38    // Act39    const out = noUndefinedAsContext(value);40    // Assert41    expect(out).not.toBe(value);42    expect(out.value).toBe(value.value);43    expect(out.context).toBe(UndefinedContextPlaceholder);44    expect(out.hasToBeCloned).toBe(value.hasToBeCloned);45  });...

AlwaysShrinkableArbitrary.ts

Source:AlwaysShrinkableArbitrary.ts

1import { Arbitrary } from '../../check/arbitrary/definition/Arbitrary';2import { Value } from '../../check/arbitrary/definition/Value';3import { Random } from '../../random/generator/Random';4import { Stream } from '../../stream/Stream';5import { noUndefinedAsContext, UndefinedContextPlaceholder } from './helpers/NoUndefinedAsContext';6/**7 * Arbitrary considering any value as shrinkable whatever the received context.8 * In case the context corresponds to nil, it will be checked when calling shrink:9 * valid would mean stream coming from shrink, otherwise empty stream10 * @internal11 */12export class AlwaysShrinkableArbitrary<Ts> extends Arbitrary<Ts> {13  constructor(readonly arb: Arbitrary<Ts>) {14    super();15  }16  generate(mrng: Random, biasFactor: number | undefined): Value<Ts> {17    const value = this.arb.generate(mrng, biasFactor);18    return noUndefinedAsContext(value);19  }20  canShrinkWithoutContext(value: unknown): value is Ts {21    return true;22  }23  shrink(value: Ts, context: unknown): Stream<Value<Ts>> {24    if (context === undefined && !this.arb.canShrinkWithoutContext(value)) {25      // This arbitrary will never produce any context being `undefined`26      // neither during `generate` nor during `shrink`27      return Stream.nil();28    }29    const safeContext = context !== UndefinedContextPlaceholder ? context : undefined;30    return this.arb.shrink(value, safeContext).map(noUndefinedAsContext);31  }...

NoUndefinedAsContext.ts

Source:NoUndefinedAsContext.ts

1import { Value } from '../../../check/arbitrary/definition/Value';2/** @internal */3export const UndefinedContextPlaceholder = Symbol('UndefinedContextPlaceholder');4/** @internal */5export function noUndefinedAsContext<Ts>(value: Value<Ts>): Value<Ts> {6  if (value.context !== undefined) {7    return value;8  }9  if (value.hasToBeCloned) {10    return new Value(value.value_, UndefinedContextPlaceholder, () => value.value);11  }12  return new Value(value.value_, UndefinedContextPlaceholder);...

Using AI Code Generation

1const {UndefinedContextPlaceholder} = require('fast-check-monorepo');2const {UndefinedContextPlaceholder} = require('fast-check-monorepo');3const {UndefinedContextPlaceholder} = require('fast-check-monorepo');4const {UndefinedContextPlaceholder} = require('fast-check-monorepo');5const {UndefinedContextPlaceholder} = require('fast-check-monorepo');6const {UndefinedContextPlaceholder} = require('fast-check-monorepo');7const {UndefinedContextPlaceholder} = require('fast-check-monorepo');8const {UndefinedContextPlaceholder} = require('fast-check-monorepo');9const {UndefinedContextPlaceholder} = require('fast-check-monorepo');10const {UndefinedContextPlaceholder} = require('fast-check-monorepo');11const {UndefinedContextPlaceholder} = require('fast-check-monorepo');12const {UndefinedContextPlaceholder} = require('fast-check-monorepo');13const {UndefinedContextPlaceholder} = require('fast-check-monorepo');14const {UndefinedContextPlaceholder} = require('fast-check-monorepo');15const {UndefinedContextPlaceholder} = require('fast-check-monorepo');16const {UndefinedContextPlaceholder} = require('fast-check-monorepo');17const {UndefinedContextPlaceholder} = require('fast-check-monorepo');18const {UndefinedContextPlaceholder} = require('fast-check-monorepo');19const {UndefinedContextPlaceholder} = require('fast-check-monorepo');20const {UndefinedContextPlaceholder} = require('fast-check-monorepo');21const {UndefinedContextPlaceholder} = require('fast-check-monorepo');22const {UndefinedContextPlaceholder} = require('fast-check-monorepo');23const {Undefined

Using AI Code Generation

1const fc = require('fast-check');2const { UndefinedContextPlaceholder } = require('fast-check/lib/types/arbitrary/UndefinedContextPlaceholder');3const arb = fc.integer().filter(n => n % 2 === 0);4const arb2 = arb.filter(n => n % 3 === 0);5const arb3 = arb.filter(n => n % 5 === 0);6const arb4 = fc.oneof(arb2, arb3);7const arb5 = fc.oneof(arb4, arb);8const arb6 = arb5.filter(n => n % 7 === 0);9const arb7 = arb6.filter(n => n % 11 === 0);10const arb8 = arb7.filter(n => n % 13 === 0);11const arb9 = arb8.filter(n => n % 17 === 0);12const arb10 = arb9.filter(n => n % 19 === 0);13const arb11 = arb10.filter(n => n % 23 === 0);14const arb12 = arb11.filter(n => n % 29 === 0);15const arb13 = arb12.filter(n => n % 31 === 0);16const arb14 = arb13.filter(n => n % 37 === 0);17const arb15 = arb14.filter(n => n % 41 === 0);18const arb16 = arb15.filter(n => n % 43 === 0);19const arb17 = arb16.filter(n => n % 47 === 0);20const arb18 = arb17.filter(n => n % 53 === 0);21const arb19 = arb18.filter(n => n % 59 === 0);22const arb20 = arb19.filter(n => n % 61 === 0);23const arb21 = arb20.filter(n => n % 67 === 0);24const arb22 = arb21.filter(n => n % 71 === 0);25const arb23 = arb22.filter(n => n % 73 === 0);26const arb24 = arb23.filter(n => n % 79 === 0);27const arb25 = arb24.filter(n => n % 83 === 0);28const arb26 = arb25.filter(n => n % 89 === 0);29const arb27 = arb26.filter(n => n % 97 === 0);30const arb28 = arb27.filter(n => n % 101 === 0);

Using AI Code Generation

1const fastCheck = require('fast-check');2const fc = fastCheck;3const fc2 = fastCheck;4const fc3 = fastCheck;5const fc4 = fastCheck;6const fc5 = fastCheck;7const fc6 = fastCheck;8const fc7 = fastCheck;9const fc8 = fastCheck;10const fc9 = fastCheck;11const fc10 = fastCheck;12const fc11 = fastCheck;13const fc12 = fastCheck;14const fc13 = fastCheck;15const fc14 = fastCheck;16const fc15 = fastCheck;17const fc16 = fastCheck;18const fc17 = fastCheck;19const fc18 = fastCheck;20const fc19 = fastCheck;21const fc20 = fastCheck;22const fc21 = fastCheck;23const fc22 = fastCheck;24const fc23 = fastCheck;25const fc24 = fastCheck;26const fc25 = fastCheck;27const fc26 = fastCheck;28const fc27 = fastCheck;29const fc28 = fastCheck;30const fc29 = fastCheck;31const fc30 = fastCheck;32const fc31 = fastCheck;33const fc32 = fastCheck;34const fc33 = fastCheck;35const fc34 = fastCheck;36const fc35 = fastCheck;37const fc36 = fastCheck;38const fc37 = fastCheck;39const fc38 = fastCheck;40const fc39 = fastCheck;41const fc40 = fastCheck;42const fc41 = fastCheck;43const fc42 = fastCheck;44const fc43 = fastCheck;45const fc44 = fastCheck;46const fc45 = fastCheck;47const fc46 = fastCheck;48const fc47 = fastCheck;49const fc48 = fastCheck;50const fc49 = fastCheck;51const fc50 = fastCheck;52const fc51 = fastCheck;53const fc52 = fastCheck;54const fc53 = fastCheck;55const fc54 = fastCheck;56const fc55 = fastCheck;57const fc56 = fastCheck;58const fc57 = fastCheck;59const fc58 = fastCheck;60const fc59 = fastCheck;61const fc60 = fastCheck;62const fc61 = fastCheck;63const fc62 = fastCheck;64const fc63 = fastCheck;65const fc64 = fastCheck;66const fc65 = fastCheck;

Using AI Code Generation

1const fc = require("fast-check");2const { UndefinedContextPlaceholder } = require("fast-check-monorepo");3const placeholder = UndefinedContextPlaceholder();4const optionalParameterFunction = (requiredParameter, optionalParameter) => {5  if (optionalParameter === placeholder) {6    return requiredParameter;7  } else {8    return requiredParameter + optionalParameter;9  }10};11describe("optional parameter function", () => {12  it("should return required parameter for placeholder", () => {13    fc.assert(14      fc.property(fc.anything(), (requiredParameter) => {15        expect(optionalParameterFunction(requiredParameter, placeholder)).toEqual(16        );17      })18    );19  });20  it("should return sum of required and optional parameters", () => {21    fc.assert(22      fc.property(fc.anything(), fc.anything(), (requiredParameter, optionalParameter) => {23        expect(optionalParameterFunction(requiredParameter, optionalParameter)).toEqual(24        );25      })26    );27  });28});

Using AI Code Generation

1const { UndefinedContextPlaceholder } = require('fast-check-monorepo');2const obj = UndefinedContextPlaceholder();3console.log(obj);4const newObj = Object.assign({}, obj);5console.log(newObj);6console.log(obj);7console.log(newObj);8console.log(newObj.undefined);9console.log(newObj.undefined.a);10console.log(newObj.undefined.undefined);11console.log(newObj.undefined.undefined.undefined);12console.log(newObj.undefined.undefined.undefined.undefined);13console.log(newObj.undefined.undefined.undefined.undefined.undefined);14console.log(newObj.undefined.undefined.undefined.undefined.undefined.undefined);15console.log(newObj.undefined.undefined.undefined.undefined.undefined.undefined.undefined);16console.log(newObj.undefined.undefined.undefined.undefined.undefined.undefined.undefined.undefined);17console.log(newObj.undefined.undefined.undefined.undefined.undefined.undefined.undefined.undefined.undefined);

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