import {  basename, extname, isObject, stripTags, parseIssueHref,  parseUrl, translateMonth, translateDay, blobToDataURI,  toAbsoluteUrl, encodeURLEncodedBase64, decodeURLEncodedBase64,  isDarkTheme, getCurrentLocale, parseDom, serializeXml, sleep,} from './utils.js'; afterEach(() => {  // Remove 'lang' and 'style' attributes of html tag  document.documentElement.removeAttribute('lang');  document.documentElement.removeAttribute('style');}); test('basename', () => {  expect(basename('/path/to/file.js')).toEqual('file.js');  expect(basename('/path/to/file')).toEqual('file');  expect(basename('file.js')).toEqual('file.js');}); test('extname', () => {  expect(extname('/path/to/file.js')).toEqual('.js');  expect(extname('/path/')).toEqual('');  expect(extname('/path')).toEqual('');  expect(extname('file.js')).toEqual('.js');}); test('isObject', () => {  expect(isObject({})).toBeTruthy();  expect(isObject([])).toBeFalsy();}); test('should return true if dark theme is enabled', () => {  // When --is-dark-theme var is defined with value true  document.documentElement.style.setProperty('--is-dark-theme', 'true');  expect(isDarkTheme()).toBeTruthy();   // when --is-dark-theme var is defined with value TRUE  document.documentElement.style.setProperty('--is-dark-theme', 'TRUE');  expect(isDarkTheme()).toBeTruthy();}); test('should return false if dark theme is disabled', () => {  // when --is-dark-theme var is defined with value false  document.documentElement.style.setProperty('--is-dark-theme', 'false');  expect(isDarkTheme()).toBeFalsy();   // when --is-dark-theme var is defined with value FALSE  document.documentElement.style.setProperty('--is-dark-theme', 'FALSE');  expect(isDarkTheme()).toBeFalsy();}); test('should return false if dark theme is not defined', () => {  // when --is-dark-theme var is not exist  expect(isDarkTheme()).toBeFalsy();}); test('stripTags', () => {  expect(stripTags('<a>test</a>')).toEqual('test');}); test('parseIssueHref', () => {  expect(parseIssueHref('/owner/repo/issues/1')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('/owner/repo/pulls/1?query')).toEqual({owner: 'owner', repo: 'repo', type: 'pulls', index: '1'});  expect(parseIssueHref('/owner/repo/issues/1#hash')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('/sub/owner/repo/issues/1')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('/sub/sub2/owner/repo/pulls/1')).toEqual({owner: 'owner', repo: 'repo', type: 'pulls', index: '1'});  expect(parseIssueHref('/sub/sub2/owner/repo/issues/1?query')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('/sub/sub2/owner/repo/issues/1#hash')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('https://example.com/owner/repo/issues/1')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('https://example.com/owner/repo/pulls/1?query')).toEqual({owner: 'owner', repo: 'repo', type: 'pulls', index: '1'});  expect(parseIssueHref('https://example.com/owner/repo/issues/1#hash')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('https://example.com/sub/owner/repo/issues/1')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('https://example.com/sub/sub2/owner/repo/pulls/1')).toEqual({owner: 'owner', repo: 'repo', type: 'pulls', index: '1'});  expect(parseIssueHref('https://example.com/sub/sub2/owner/repo/issues/1?query')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('https://example.com/sub/sub2/owner/repo/issues/1#hash')).toEqual({owner: 'owner', repo: 'repo', type: 'issues', index: '1'});  expect(parseIssueHref('')).toEqual({owner: undefined, repo: undefined, type: undefined, index: undefined});}); test('parseUrl', () => {  expect(parseUrl('').pathname).toEqual('/');  expect(parseUrl('/path').pathname).toEqual('/path');  expect(parseUrl('/path?search').pathname).toEqual('/path');  expect(parseUrl('/path?search').search).toEqual('?search');  expect(parseUrl('/path?search#hash').hash).toEqual('#hash');  expect(parseUrl('https://localhost/path').pathname).toEqual('/path');  expect(parseUrl('https://localhost/path?search').pathname).toEqual('/path');  expect(parseUrl('https://localhost/path?search').search).toEqual('?search');  expect(parseUrl('https://localhost/path?search#hash').hash).toEqual('#hash');}); test('getCurrentLocale', () => {  // HTML document without explicit lang  expect(getCurrentLocale()).toEqual('');   // HTML document with explicit lang  document.documentElement.setAttribute('lang', 'en-US');  expect(getCurrentLocale()).toEqual('en-US');}); test('translateMonth', () => {  const originalLang = document.documentElement.lang;  document.documentElement.lang = 'en-US';  expect(translateMonth(0)).toEqual('Jan');  expect(translateMonth(4)).toEqual('May');  document.documentElement.lang = 'es-ES';  expect(translateMonth(5)).toEqual('jun');  expect(translateMonth(6)).toEqual('jul');  document.documentElement.lang = originalLang;}); test('translateDay', () => {  const originalLang = document.documentElement.lang;  document.documentElement.lang = 'fr-FR';  expect(translateDay(1)).toEqual('lun.');  expect(translateDay(5)).toEqual('ven.');  document.documentElement.lang = 'pl-PL';  expect(translateDay(1)).toEqual('pon.');  expect(translateDay(5)).toEqual('pt.');  document.documentElement.lang = originalLang;}); test('blobToDataURI', async () => {  const blob = new Blob([JSON.stringify({test: true})], {type: 'application/json'});  expect(await blobToDataURI(blob)).toEqual('data:application/json;base64,eyJ0ZXN0Ijp0cnVlfQ==');}); test('toAbsoluteUrl', () => {  expect(toAbsoluteUrl('//host/dir')).toEqual('http://host/dir');  expect(toAbsoluteUrl('https://host/dir')).toEqual('https://host/dir');  expect(toAbsoluteUrl('http://host/dir')).toEqual('http://host/dir');  expect(toAbsoluteUrl('')).toEqual('http://localhost:3000');  expect(toAbsoluteUrl('/user/repo')).toEqual('http://localhost:3000/user/repo');  expect(() => toAbsoluteUrl('path')).toThrowError('unsupported');}); test('encodeURLEncodedBase64, decodeURLEncodedBase64', () => {  // TextEncoder is Node.js API while Uint8Array is jsdom API and their outputs are not  // structurally comparable, so we convert to array to compare. The conversion can be  // removed once https://github.com/jsdom/jsdom/issues/2524 is resolved.  const encoder = new TextEncoder();  const uint8array = encoder.encode.bind(encoder);   expect(encodeURLEncodedBase64(uint8array('AA?'))).toEqual('QUE_'); // standard base64: "QUE/"  expect(encodeURLEncodedBase64(uint8array('AA~'))).toEqual('QUF-'); // standard base64: "QUF+"   expect(Array.from(decodeURLEncodedBase64('QUE/'))).toEqual(Array.from(uint8array('AA?')));  expect(Array.from(decodeURLEncodedBase64('QUF+'))).toEqual(Array.from(uint8array('AA~')));  expect(Array.from(decodeURLEncodedBase64('QUE_'))).toEqual(Array.from(uint8array('AA?')));  expect(Array.from(decodeURLEncodedBase64('QUF-'))).toEqual(Array.from(uint8array('AA~')));   expect(encodeURLEncodedBase64(uint8array('a'))).toEqual('YQ'); // standard base64: "YQ=="  expect(Array.from(decodeURLEncodedBase64('YQ'))).toEqual(Array.from(uint8array('a')));  expect(Array.from(decodeURLEncodedBase64('YQ=='))).toEqual(Array.from(uint8array('a')));}); test('parseDom', () => {  const paragraphStr = 'This is sample paragraph';  const paragraphTagStr = `<p>${paragraphStr}</p>`;  const content = parseDom(paragraphTagStr, 'text/html');  expect(content.body.innerHTML).toEqual(paragraphTagStr);   // Content should have only one paragraph  const paragraphs = content.getElementsByTagName('p');  expect(paragraphs.length).toEqual(1);  expect(paragraphs[0].textContent).toEqual(paragraphStr);}); test('serializeXml', () => {  const textStr = 'This is a sample text';  const tagName = 'item';  const node = document.createElement(tagName);  node.textContent = textStr;  expect(serializeXml(node)).toEqual(`<${tagName} xmlns="http://www.w3.org/1999/xhtml">${textStr}</${tagName}>`);}); test('sleep', async () => {  await testSleep(2000);}); async function testSleep(ms) {  const startTime = Date.now();  // Record the start time  await sleep(ms);  const endTime = Date.now();    // Record the end time  const actualSleepTime = endTime - startTime;  expect(actualSleepTime >= ms).toBeTruthy();}