lodash/test/uncommon-symbols.spec.ts

import assert from 'node:assert';
import lodashStable from 'lodash';
import { emojiVar, comboMarks, fitzModifiers } from './utils';
import repeat from '../src/repeat';
import camelCase from '../src/camelCase';
import capitalize from '../src/capitalize';
import pad from '../src/pad';
import padStart from '../src/padStart';
import padEnd from '../src/padEnd';
import size from '../src/size';
import split from '../src/split';
import toArray from '../src/toArray';
import trim from '../src/trim';
import trimStart from '../src/trimStart';
import trimEnd from '../src/trimEnd';
import truncate from '../src/truncate';
import words from '../src/words';

describe('uncommon symbols', () => {
    const flag = '\ud83c\uddfa\ud83c\uddf8',
        heart = `\u2764${emojiVar}`,
        hearts = '\ud83d\udc95',
        comboGlyph = `\ud83d\udc68\u200d${heart}\u200d\ud83d\udc8B\u200d\ud83d\udc68`,
        hashKeycap = `#${emojiVar}\u20e3`,
        leafs = '\ud83c\udf42',
        mic = '\ud83c\udf99',
        noMic = `${mic}\u20e0`,
        raisedHand = `\u270B${emojiVar}`,
        rocket = '\ud83d\ude80',
        thumbsUp = '\ud83d\udc4d';

    it('should account for astral symbols', () => {
        const allHearts = repeat(hearts, 10),
            chars = hearts + comboGlyph,
            string = `A ${leafs}, ${comboGlyph}, and ${rocket}`,
            trimChars = comboGlyph + hearts,
            trimString = trimChars + string + trimChars;

        assert.strictEqual(camelCase(`${hearts} the ${leafs}`), `${hearts}The${leafs}`);
        assert.strictEqual(camelCase(string), `a${leafs}${comboGlyph}And${rocket}`);
        assert.strictEqual(capitalize(rocket), rocket);

        assert.strictEqual(pad(string, 16), ` ${string}  `);
        assert.strictEqual(padStart(string, 16), `   ${string}`);
        assert.strictEqual(padEnd(string, 16), `${string}   `);

        assert.strictEqual(pad(string, 16, chars), hearts + string + chars);
        assert.strictEqual(padStart(string, 16, chars), chars + hearts + string);
        assert.strictEqual(padEnd(string, 16, chars), string + chars + hearts);

        assert.strictEqual(size(string), 13);
        assert.deepStrictEqual(split(string, ' '), [
            'A',
            `${leafs},`,
            `${comboGlyph},`,
            'and',
            rocket,
        ]);
        assert.deepStrictEqual(split(string, ' ', 3), ['A', `${leafs},`, `${comboGlyph},`]);
        assert.deepStrictEqual(split(string, undefined), [string]);
        assert.deepStrictEqual(split(string, undefined, -1), [string]);
        assert.deepStrictEqual(split(string, undefined, 0), []);

        const expected = [
            'A',
            ' ',
            leafs,
            ',',
            ' ',
            comboGlyph,
            ',',
            ' ',
            'a',
            'n',
            'd',
            ' ',
            rocket,
        ];

        assert.deepStrictEqual(split(string, ''), expected);
        assert.deepStrictEqual(split(string, '', 6), expected.slice(0, 6));
        assert.deepStrictEqual(toArray(string), expected);

        assert.strictEqual(trim(trimString, chars), string);
        assert.strictEqual(trimStart(trimString, chars), string + trimChars);
        assert.strictEqual(trimEnd(trimString, chars), trimChars + string);

        assert.strictEqual(truncate(string, { length: 13 }), string);
        assert.strictEqual(truncate(string, { length: 6 }), `A ${leafs}...`);

        assert.deepStrictEqual(words(string), ['A', leafs, comboGlyph, 'and', rocket]);
        assert.deepStrictEqual(toArray(hashKeycap), [hashKeycap]);
        assert.deepStrictEqual(toArray(noMic), [noMic]);

        lodashStable.times(2, (index) => {
            let separator = index ? RegExp(hearts) : hearts,
                options = { length: 4, separator: separator },
                actual = truncate(string, options);

            assert.strictEqual(actual, 'A...');
            assert.strictEqual(actual.length, 4);

            actual = truncate(allHearts, options);
            assert.strictEqual(actual, `${hearts}...`);
            assert.strictEqual(actual.length, 5);
        });
    });

    it('should account for combining diacritical marks', () => {
        const values = lodashStable.map(comboMarks, (mark) => `o${mark}`);

        const expected = lodashStable.map(values, (value) => [1, [value], [value]]);

        const actual = lodashStable.map(values, (value) => [
            size(value),
            toArray(value),
            words(value),
        ]);

        assert.deepStrictEqual(actual, expected);
    });

    it('should account for fitzpatrick modifiers', () => {
        const values = lodashStable.map(fitzModifiers, (modifier) => thumbsUp + modifier);

        const expected = lodashStable.map(values, (value) => [1, [value], [value]]);

        const actual = lodashStable.map(values, (value) => [
            size(value),
            toArray(value),
            words(value),
        ]);

        assert.deepStrictEqual(actual, expected);
    });

    it('should account for regional symbols', () => {
        const pair = flag.match(/\ud83c[\udde6-\uddff]/g),
            regionals = pair.join(' ');

        assert.strictEqual(size(flag), 1);
        assert.strictEqual(size(regionals), 3);

        assert.deepStrictEqual(toArray(flag), [flag]);
        assert.deepStrictEqual(toArray(regionals), [pair[0], ' ', pair[1]]);

        assert.deepStrictEqual(words(flag), [flag]);
        assert.deepStrictEqual(words(regionals), [pair[0], pair[1]]);
    });

    it('should account for variation selectors', () => {
        assert.strictEqual(size(heart), 1);
        assert.deepStrictEqual(toArray(heart), [heart]);
        assert.deepStrictEqual(words(heart), [heart]);
    });

    it('should account for variation selectors with fitzpatrick modifiers', () => {
        const values = lodashStable.map(fitzModifiers, (modifier) => raisedHand + modifier);

        const expected = lodashStable.map(values, (value) => [1, [value], [value]]);

        const actual = lodashStable.map(values, (value) => [
            size(value),
            toArray(value),
            words(value),
        ]);

        assert.deepStrictEqual(actual, expected);
    });

    it('should match lone surrogates', () => {
        const pair = hearts.split(''),
            surrogates = `${pair[0]} ${pair[1]}`;

        assert.strictEqual(size(surrogates), 3);
        assert.deepStrictEqual(toArray(surrogates), [pair[0], ' ', pair[1]]);
        assert.deepStrictEqual(words(surrogates), []);
    });

    it('should match side by side fitzpatrick modifiers separately ', () => {
        const string = fitzModifiers[0] + fitzModifiers[0];
        assert.deepStrictEqual(toArray(string), [fitzModifiers[0], fitzModifiers[0]]);
    });
});