d281ea820b
The result of utf-8 encoding a string was represented in a string, where each individual character represented a single byte according to its character code. All usages of this data were interested in the byte itself, so this required conversion from a character back to its code. This commit simply stores the individual bytes in array to avoid the conversion. This yields a ~10% performance improvement for i18n message ID computation. PR Close #39694
104 lines
3.5 KiB
TypeScript
104 lines
3.5 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {escapeRegExp, partitionArray, splitAtColon, stringify, utf8Encode} from '../src/util';
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{
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describe('util', () => {
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describe('splitAtColon', () => {
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it('should split when a single ":" is present', () => {
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expect(splitAtColon('a:b', [])).toEqual(['a', 'b']);
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});
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it('should trim parts', () => {
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expect(splitAtColon(' a : b ', [])).toEqual(['a', 'b']);
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});
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it('should support multiple ":"', () => {
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expect(splitAtColon('a:b:c', [])).toEqual(['a', 'b:c']);
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});
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it('should use the default value when no ":" is present', () => {
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expect(splitAtColon('ab', ['c', 'd'])).toEqual(['c', 'd']);
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});
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});
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describe('RegExp', () => {
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it('should escape regexp', () => {
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expect(new RegExp(escapeRegExp('b')).exec('abc')).toBeTruthy();
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expect(new RegExp(escapeRegExp('b')).exec('adc')).toBeFalsy();
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expect(new RegExp(escapeRegExp('a.b')).exec('a.b')).toBeTruthy();
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expect(new RegExp(escapeRegExp('a.b')).exec('axb')).toBeFalsy();
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});
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});
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describe('utf8encode', () => {
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// tests from https://github.com/mathiasbynens/wtf-8
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it('should encode to utf8', () => {
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const tests = [
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['abc', 'abc'],
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// // 1-byte
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['\0', '\0'],
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// // 2-byte
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['\u0080', '\xc2\x80'],
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['\u05ca', '\xd7\x8a'],
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['\u07ff', '\xdf\xbf'],
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// // 3-byte
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['\u0800', '\xe0\xa0\x80'],
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['\u2c3c', '\xe2\xb0\xbc'],
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['\uffff', '\xef\xbf\xbf'],
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// //4-byte
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['\uD800\uDC00', '\xF0\x90\x80\x80'],
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['\uD834\uDF06', '\xF0\x9D\x8C\x86'],
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['\uDBFF\uDFFF', '\xF4\x8F\xBF\xBF'],
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// unmatched surrogate halves
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// high surrogates: 0xD800 to 0xDBFF
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['\uD800', '\xED\xA0\x80'],
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['\uD800\uD800', '\xED\xA0\x80\xED\xA0\x80'],
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['\uD800A', '\xED\xA0\x80A'],
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['\uD800\uD834\uDF06\uD800', '\xED\xA0\x80\xF0\x9D\x8C\x86\xED\xA0\x80'],
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['\uD9AF', '\xED\xA6\xAF'],
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['\uDBFF', '\xED\xAF\xBF'],
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// low surrogates: 0xDC00 to 0xDFFF
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['\uDC00', '\xED\xB0\x80'],
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['\uDC00\uDC00', '\xED\xB0\x80\xED\xB0\x80'],
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['\uDC00A', '\xED\xB0\x80A'],
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['\uDC00\uD834\uDF06\uDC00', '\xED\xB0\x80\xF0\x9D\x8C\x86\xED\xB0\x80'],
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['\uDEEE', '\xED\xBB\xAE'],
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['\uDFFF', '\xED\xBF\xBF'],
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];
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tests.forEach(([input, output]) => {
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expect(utf8Encode(input).map(byte => String.fromCharCode(byte)).join('')).toEqual(output);
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});
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});
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});
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describe('stringify()', () => {
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it('should handle objects with no prototype.', () => {
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expect(stringify(Object.create(null))).toEqual('object');
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});
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});
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describe('partitionArray()', () => {
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it('should handle empty arrays', () => {
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expect(partitionArray([], () => true)).toEqual([[], []]);
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});
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it('should handle arrays with primitive type values', () => {
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expect(partitionArray([1, 2, 3], (el: number) => el < 2)).toEqual([[1], [2, 3]]);
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});
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it('should handle arrays of objects', () => {
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expect(partitionArray([{id: 1}, {id: 2}, {id: 3}], (el: any) => el.id < 2)).toEqual([
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[{id: 1}], [{id: 2}, {id: 3}]
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]);
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});
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});
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});
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}
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