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How to use secondIsLowSurrogate method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

fullUnicodeString.spec.ts

Source:fullUnicodeString.spec.ts

1import * as fc from 'fast-check';2import { fullUnicodeString } from '../../../src/arbitrary/fullUnicodeString';3import { Value } from '../../../src/check/arbitrary/definition/Value';4import {5  assertProduceValuesShrinkableWithoutContext,6  assertShrinkProducesSameValueWithoutInitialContext,7  assertProduceCorrectValues,8  assertProduceSameValueGivenSameSeed,9} from './__test-helpers__/ArbitraryAssertions';10import { buildShrinkTree, renderTree } from './__test-helpers__/ShrinkTree';11describe('fullUnicodeString (integration)', () => {12  type Extra = { minLength?: number; maxLength?: number };13  const extraParameters: fc.Arbitrary<Extra> = fc14    .tuple(fc.nat({ max: 5 }), fc.nat({ max: 30 }), fc.boolean(), fc.boolean())15    .map(([min, gap, withMin, withMax]) => ({16      minLength: withMin ? min : undefined,17      maxLength: withMax ? min + gap : undefined,18    }));19  const isCorrect = (value: string, extra: Extra) => {20    if (extra.minLength !== undefined) {21      expect([...value].length).toBeGreaterThanOrEqual(extra.minLength);22    }23    if (extra.maxLength !== undefined) {24      expect([...value].length).toBeLessThanOrEqual(extra.maxLength);25    }26    for (const c of [...value]) {27      if (c.length === 1) {28        const isSurrogate = c.charCodeAt(0) >= 0xd800 && c.charCodeAt(0) <= 0xdfff;29        expect(isSurrogate).toBe(false);30      } else {31        const firstIsHighSurrogate = c.charCodeAt(0) >= 0xd800 && c.charCodeAt(0) <= 0xdbff;32        const secondIsLowSurrogate = c.charCodeAt(1) >= 0xdc00 && c.charCodeAt(1) <= 0xdfff;33        expect(firstIsHighSurrogate).toBe(true);34        expect(secondIsLowSurrogate).toBe(true);35      }36    }37  };38  const fullUnicodeStringBuilder = (extra: Extra) => fullUnicodeString(extra);39  it('should produce the same values given the same seed', () => {40    assertProduceSameValueGivenSameSeed(fullUnicodeStringBuilder, { extraParameters });41  });42  it('should only produce correct values', () => {43    assertProduceCorrectValues(fullUnicodeStringBuilder, isCorrect, { extraParameters });44  });45  it('should produce values seen as shrinkable without any context', () => {46    assertProduceValuesShrinkableWithoutContext(fullUnicodeStringBuilder, { extraParameters });47  });48  it('should be able to shrink to the same values without initial context', () => {49    assertShrinkProducesSameValueWithoutInitialContext(fullUnicodeStringBuilder, { extraParameters });50  });51  it.each`52    source53    ${''}54    ${'azerty'}55    ${'ah! ah!'}56    ${'a\uD83D\uDC31b'}57    ${'\u{1f431}\u{1f431}\u{1f431}\u{1f431}\u{1f431}\u{1f431}\u{1f431}\u{1f431}\u{1f431}\u{1f431}' /* by default maxLength = maxLengthFromMinLength(0) = 10 */}58    ${'\u{1f468}\u{1f3fe}\u{200d}\u{1f469}\u{1f3fc}'}59    ${'\u{1f468}\u{1f3fe}\u{200d}' /* accept incomplete graphemes */}60  `('should be able to generate $source with fc.fullUnicodeString()', ({ source }) => {61    // Arrange / Act62    const arb = fullUnicodeString();63    const out = arb.canShrinkWithoutContext(source);64    // Assert65    expect(out).toBe(true);66  });67  it.each`68    source                             | constraints69    ${'a\uD83Db' /* invalid string */} | ${{}}70    ${'ab' /* not large enough */}     | ${{ minLength: 3 }}71    ${'abcd' /* too large */}          | ${{ maxLength: 3 }}72  `('should not be able to generate $source with fc.fullUnicodeString($constraints)', ({ source, constraints }) => {73    // Arrange / Act74    const arb = fullUnicodeString(constraints);75    const out = arb.canShrinkWithoutContext(source);76    // Assert77    expect(out).toBe(false);78  });79  it.each`80    rawValue81    ${'Hey \u{1f431}!'}82    ${'\u{1f431}'.repeat(50) /* longer than default maxGeneratedLength but ok for shrink */}83  `('should be able to shrink $rawValue with fc.fullUnicodeString()', ({ rawValue }) => {84    // Arrange85    const arb = fullUnicodeString();86    const value = new Value(rawValue, undefined);87    // Act88    const renderedTree = renderTree(buildShrinkTree(arb, value, { numItems: 100 })).join('\n');89    // Assert90    expect(arb.canShrinkWithoutContext(rawValue)).toBe(true);91    expect(renderedTree).toMatchSnapshot();92  });...

Using AI Code Generation

1const {secondIsLowSurrogate} = require('fast-check');2const {secondIsLowSurrogate} = require('fast-check');3const {secondIsLowSurrogate} = require('fast-check');4const {secondIsLowSurrogate} = require('fast-check');5const {secondIsLowSurrogate} = require('fast-check');6const {secondIsLowSurrogate} = require('fast-check');7const {secondIsLowSurrogate} = require('fast-check');8const {secondIsLowSurrogate} = require('fast-check');9const {secondIsLowSurrogate} = require('fast-check');10const {secondIsLowSurrogate} = require('fast-check');11const {secondIsLowSurrogate} = require('fast-check');12const {secondIsLowSurrogate} = require('fast-check');13const {secondIsLowSurrogate} =

Using AI Code Generation

1const {secondIsLowSurrogate} = require('fast-check-monorepo/packages/fast-check/lib/check/runner/utils/Unicode');2console.log(secondIsLowSurrogate('a', 0));3console.log(secondIsLowSurrogate('ab', 1));4console.log(secondIsLowSurrogate('a\ud83c', 1));5console.log(secondIsLowSurrogate('a\ud83c\ud83c', 1));6console.log(secondIsLowSurrogate('a\ud83c\ud83c', 2));7Siva, I have released a new version of the library (1.23.1) with your fix. Thanks again for your contribution!8I have released a new version of the library (1.23.1) with your fix. Thanks again for your contribution!

Using AI Code Generation

1const {secondIsLowSurrogate} = require('fast-check');2console.log(secondIsLowSurrogate('𠮷野家'));3{4  "dependencies": {5  }6}

Using AI Code Generation

1const {secondIsLowSurrogate} = require('fast-check');2const {secondIsLowSurrogate: secondIsLowSurrogate2} = require('fast-check/lib/utils/unicode/SecondIsLowSurrogate');3const {secondIsLowSurrogate: secondIsLowSurrogate3} = require('fast-check/lib/utils/unicode/SecondIsLowSurrogate');4console.log(secondIsLowSurrogate(0x1f1f5));5console.log(secondIsLowSurrogate2(0x1f1f5));6console.log(secondIsLowSurrogate3(0x1f1f5));

Using AI Code Generation

1const { secondIsLowSurrogate } = require('@dmail/unicode');2const { stringOf } = require('@dmail/string-arbitrary');3const { assert } = require('assert');4const { property } = require('fast-check');5const isHighSurrogate = (char) => char >= 0xd800 && char <= 0xdbff;6const isLowSurrogate = (char) => char >= 0xdc00 && char <= 0xdfff;7const isSurrogatePair = (char1, char2) => isHighSurrogate(char1) && isLowSurrogate(char2);8property(stringOf(1, 2), (str) => {9  const char1 = str.charCodeAt(0);10  const char2 = str.charCodeAt(1);11  const result = isSurrogatePair(char1, char2);12  const result2 = secondIsLowSurrogate(char1, char2);13  assert.strictEqual(result, result2);14}).check();15const { secondIsLowSurrogate } = require('@dmail/unicode');16const { stringOf } = require('@dmail/string-arbitrary');17const { assert } = require('assert');18const { property } = require('fast-check');19const isHighSurrogate = (char) => char >= 0xd800 && char <= 0xdbff;20const isLowSurrogate = (char) => char >= 0xdc00 && char <= 0xdfff;21const isSurrogatePair = (char1, char2) => isHighSurrogate(char1) && isLowSurrogate(char2);22property(stringOf(1, 2), (str) => {23  const char1 = str.charCodeAt(0);24  const char2 = str.charCodeAt(1);25  const result = isSurrogatePair(char1, char2);26  const result2 = secondIsLowSurrogate(char1, char2);27  assert.strictEqual(result, result2);28}).check();

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