64 lines
2.1 KiB
JavaScript
64 lines
2.1 KiB
JavaScript
/**
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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'use strict';
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jest.disableAutomock();
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const {encode} = require('../utf8');
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describe('UTF-8 encoding:', () => {
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it('can encode code points < U+80', () => {
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const arrayBuffer = encode('\u0000abcDEF\u007f');
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expect(new Uint8Array(arrayBuffer)).toEqual(
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new Uint8Array([0x00, 0x61, 0x62, 0x63, 0x44, 0x45, 0x46, 0x7f]));
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});
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it('can encode code points < U+800', () => {
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const arrayBuffer = encode('\u0080\u0548\u07ff');
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expect(new Uint8Array(arrayBuffer)).toEqual(
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new Uint8Array([0xc2, 0x80, 0xd5, 0x88, 0xdf, 0xbf]));
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});
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it('can encode code points < U+10000', () => {
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const arrayBuffer = encode('\u0800\uac48\uffff');
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expect(new Uint8Array(arrayBuffer)).toEqual(
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new Uint8Array([0xe0, 0xa0, 0x80, 0xea, 0xb1, 0x88, 0xef, 0xbf, 0xbf]));
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});
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it('can encode code points in the Supplementary Planes (surrogate pairs)', () => {
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const arrayBuffer = encode([
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'\ud800\udc00',
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'\ud800\ude89',
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'\ud83d\ude3b',
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'\udbff\udfff'
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].join(''));
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expect(new Uint8Array(arrayBuffer)).toEqual(
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new Uint8Array([
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0xf0, 0x90, 0x80, 0x80,
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0xf0, 0x90, 0x8a, 0x89,
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0xf0, 0x9f, 0x98, 0xbb,
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0xf4, 0x8f, 0xbf, 0xbf,
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])
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);
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});
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it('allows for stray high surrogates', () => {
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const arrayBuffer = encode(String.fromCharCode(0x61, 0xd8c6, 0x62));
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expect(new Uint8Array(arrayBuffer)).toEqual(
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new Uint8Array([0x61, 0xed, 0xa3, 0x86, 0x62]));
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});
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it('allows for stray low surrogates', () => {
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const arrayBuffer = encode(String.fromCharCode(0x61, 0xde19, 0x62));
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expect(new Uint8Array(arrayBuffer)).toEqual(
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new Uint8Array([0x61, 0xed, 0xb8, 0x99, 0x62]));
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});
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});
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