import { expect } from 'chai';

import { string } from '../../src/core/string.js';

describe('string', function () {

describe('#format', function () {

it('handles no args', function () {

const src = 'a string';

const result = string.format(src);

expect(result).to.equal('a string');

});

it('handles one arg', function () {

const src = 'a string {0}';

const result = string.format(src, 'abc');

expect(result).to.equal('a string abc');

});

it('handles two args', function () {

const src = '{0} a string {1}';

const result = string.format(src, 'abc', 'def');

expect(result).to.equal('abc a string def');

});

});

describe('#getSymbols', function () {

it('returns an array of the expected length', function () {

expect(string.getSymbols('ABC').length).to.equal(3);

expect(string.getSymbols('A🇺🇸').length).to.equal(2);

expect(string.getSymbols('👨🏿').length).to.equal(1);

expect(string.getSymbols('👁️‍🗨️').length).to.equal(1);

expect(string.getSymbols('3️⃣').length).to.equal(1);

expect(string.getSymbols('🏴‍☠️').length).to.equal(1);

});

});

describe('#fromCodePoint', function () {

it('converts basic ASCII code points to characters', function () {

expect(string.fromCodePoint(65)).to.equal('A');

expect(string.fromCodePoint(66, 67)).to.equal('BC');

expect(string.fromCodePoint(97, 98, 99)).to.equal('abc');

});

it('handles code points beyond the BMP (Basic Multilingual Plane)', function () {

// Emoji: 😀 (U+1F600 GRINNING FACE)

expect(string.fromCodePoint(0x1F600)).to.equal('😀');

// Musical note: 𝄞 (U+1D11E MUSICAL SYMBOL G CLEF)

expect(string.fromCodePoint(0x1D11E)).to.equal('𝄞');

});

it('handles multiple code points including surrogate pairs', function () {

// Mix of BMP and astral code points

expect(string.fromCodePoint(65, 0x1F600, 66)).to.equal('A😀B');

// Multiple astral code points: 💩 (U+1F4A9) and 🚀 (U+1F680)

expect(string.fromCodePoint(0x1F4A9, 0x1F680)).to.equal('💩🚀');

});

it('matches native String.fromCodePoint behavior', function () {

// Only run if native method is available

if (String.fromCodePoint) {

const testPoints = [65, 0x1F600, 0x1D11E, 0x10437];

expect(string.fromCodePoint(...testPoints)).to.equal(String.fromCodePoint(...testPoints));

}

});

});

});