How to use stringToBase64Unmapper method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

base64String.ts

Source:base64String.ts

1import { Arbitrary } from '../check/arbitrary/definition/Arbitrary';2import { array, ArrayConstraintsInternal } from './array';3import { base64 } from './base64';4import { MaxLengthUpperBound } from './_internals/helpers/MaxLengthFromMinLength';5import { StringSharedConstraints } from './_shared/StringSharedConstraints';6import { codePointsToStringMapper, codePointsToStringUnmapper } from './_internals/mappers/CodePointsToString';7import { stringToBase64Mapper, stringToBase64Unmapper } from './_internals/mappers/StringToBase64';8import { createSlicesForString } from './_internals/helpers/SlicesForStringBuilder';9export { StringSharedConstraints } from './_shared/StringSharedConstraints';10/**11 * For base64 strings12 *13 * A base64 string will always have a length multiple of 4 (padded with =)14 *15 * @param constraints - Constraints to apply when building instances (since 2.4.0)16 *17 * @remarks Since 0.0.118 * @public19 */20function base64String(constraints: StringSharedConstraints = {}): Arbitrary<string> {21  const { minLength: unscaledMinLength = 0, maxLength: unscaledMaxLength = MaxLengthUpperBound, size } = constraints;22  const minLength = unscaledMinLength + 3 - ((unscaledMinLength + 3) % 4);23  const maxLength = unscaledMaxLength - (unscaledMaxLength % 4);24  const requestedSize = constraints.maxLength === undefined && size === undefined ? '=' : size;25  if (minLength > maxLength) throw new Error('Minimal length should be inferior or equal to maximal length');26  if (minLength % 4 !== 0) throw new Error('Minimal length of base64 strings must be a multiple of 4');27  if (maxLength % 4 !== 0) throw new Error('Maximal length of base64 strings must be a multiple of 4');28  const charArbitrary = base64();29  const experimentalCustomSlices = createSlicesForString(charArbitrary, codePointsToStringUnmapper);30  const enrichedConstraints: ArrayConstraintsInternal<string> = {31    minLength,32    maxLength,33    size: requestedSize,34    experimentalCustomSlices,35  };36  return array(charArbitrary, enrichedConstraints)37    .map(codePointsToStringMapper, codePointsToStringUnmapper)38    .map(stringToBase64Mapper, stringToBase64Unmapper);39}...

StringToBase64.ts

Source:StringToBase64.ts

...12      return safeSubstring(s, 1); // remove one extra char to get to %4 == 013  }14}15/** @internal */16export function stringToBase64Unmapper(value: unknown): string {17  if (typeof value !== 'string' || value.length % 4 !== 0) {18    throw new Error('Invalid string received');19  }20  const lastTrailingIndex = value.indexOf('=');21  if (lastTrailingIndex === -1) {22    return value; // no trailing "="23  }24  const numTrailings = value.length - lastTrailingIndex;25  if (numTrailings > 2) {26    throw new Error('Cannot unmap the passed value');27  }28  return safeSubstring(value, 0, lastTrailingIndex);...

StringToBase64.spec.ts

Source:StringToBase64.spec.ts

...8    ${'abcdefgh'} | ${'abcdefgh'}9    ${'aÃ aa'}     | ${'aÃ aa' /* not rejected by this unmapper as it does not deal with first bytes */}10  `('should be able to unmap $source', ({ source, expected }) => {11    // Arrange / Act / Assert12    expect(stringToBase64Unmapper(source)).toEqual(expected);13  });14  it.each`15    source16    ${'aaaaa'}17    ${'a==='}18  `('should refuse to unmap invalid base64 strings like $source', ({ source }) => {19    // Arrange / Act / Assert20    expect(() => stringToBase64Unmapper(source)).toThrowError();21  });...

Using AI Code Generation

1const { stringToBase64Unmapper } = require("fast-check");2const unmapper = stringToBase64Unmapper();3console.log(unmapper("dGVzdA=="));4const { stringToBase64Unmapper } = require("fast-check");5const unmapper = stringToBase64Unmapper();6console.log(unmapper("dGVzdA=="));7const { stringToBase64Unmapper } = require("fast-check");8const unmapper = stringToBase64Unmapper();9console.log(unmapper("dGVzdA=="));10const { stringToBase64Unmapper } = require("fast-check");11const unmapper = stringToBase64Unmapper();12console.log(unmapper("dGVzdA=="));13const { stringToBase64Unmapper } = require("fast-check");14const unmapper = stringToBase64Unmapper();15console.log(unmapper("dGVzdA=="));16const { stringToBase64Unmapper } = require("fast-check");17const unmapper = stringToBase64Unmapper();18console.log(unmapper("dGVzdA=="));19const { stringToBase64Unmapper } = require("fast-check");20const unmapper = stringToBase64Unmapper();21console.log(unmapper("dGVzdA=="));22const { stringToBase64Unmapper } = require("fast-check");23const unmapper = stringToBase64Unmapper();24console.log(un

Using AI Code Generation

1import {stringToBase64Unmapper} from 'fast-check-monorepo'2const unmapper = stringToBase64Unmapper();3const base64String = unmapper('Hello World');4console.log(base64String);5import {stringToBase64Unmapper} from 'fast-check-monorepo'6const unmapper = stringToBase64Unmapper();7const base64String = unmapper('Hello World');8console.log(base64String);

Using AI Code Generation

1const { stringToBase64Mapper, stringToBase64Unmapper } = require('fast-check');2const { base64String } = require('fast-check/lib/arbitrary/Helpers.js');3describe('stringToBase64Mapper', () => {4  it('should be the inverse of stringToBase64Unmapper', () => {5    fc.assert(6      fc.property(fc.string(), (s) => {7        const encoded = stringToBase64Mapper(s);8        const decoded = stringToBase64Unmapper(encoded);9        expect(decoded).toEqual(s);10      })11    );12  });13});14const { stringToBase64Mapper, stringToBase64Unmapper } = require('fast-check');15const { base64String } = require('fast-check/lib/arbitrary/Helpers.js');16describe('stringToBase64Mapper', () => {17  it('should be the inverse of stringToBase64Unmapper', () => {18    fc.assert(19      fc.property(fc.string(), (s) => {20        const encoded = stringToBase64Mapper(s);21        const decoded = stringToBase64Unmapper(encoded);22        expect(decoded).toEqual(s);23      })24    );25  });26});27const { stringToBase64Mapper, stringToBase64Unmapper } = require('fast-check');28const { base64String } = require('fast-check/lib/arbitrary/Helpers.js');29describe('stringToBase64Mapper', () => {30  it('should be the inverse of stringToBase64Unmapper', () => {31    fc.assert(32      fc.property(fc.string(), (s) => {33        const encoded = stringToBase64Mapper(s);34        const decoded = stringToBase64Unmapper(encoded);35        expect(decoded).toEqual(s);36      })

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