Best JavaScript code snippet using jest
frontend.js
Source: frontend.js
1/* eslint-disable no-alert */2/* eslint-disable no-unused-vars */3const4 inputDown = document.getElementById('down_delay');5const inputRele = document.getElementById('release_delay');6const inputHotk = document.getElementById('hotkey');7const inputCores = document.getElementById('useCores');8const oneThread = document.getElementById('one');9const twoThread = document.getElementById('two');10const customThread = document.getElementById('custom');11const saveButton = document.getElementById('btn_save');12const btnMacro = document.getElementById('btn_macro');13const radioGodMode = document.getElementById('god_mode');14const BTN_NAME = ['Saved!', 'Save configs'];15// BUTTON STATES16const BTN_NORMAL = 1;17const BTN_CHANGED = 0;18window.onload = function loadSavedUserConfigs() {19 // load configs20 window.readConfigs = JSON.parse(window.config.load());21 inputDown.value = window.readConfigs.hold_delay;22 inputRele.value = window.readConfigs.release_delay;23 inputHotk.value = window.readConfigs.hotkey.toUpperCase();24 radioGodMode.checked = window.readConfigs.god_mode;25 const checkRatio = (elem) => elem.setAttribute('checked', 'checked');26 switch (window.readConfigs.cores_to_use) {27 case 1: checkRatio(oneThread); break;28 case 2: checkRatio(twoThread); break;29 default:30 checkRatio(customThread);31 inputCores.value = window.readConfigs.cores_to_use;32 break;33 }34};35// save configs36function saveCnfs() {37 let nCoresToUse = 1;38 // verify processor cores, if custom is marked39 if (customThread.checked) {40 try {41 nCoresToUse = parseInt(inputCores.value, 10);42 const avaliableCores = window.cpu.getCores();43 const cpuModel = window.cpu.getName();44 if (nCoresToUse > avaliableCores) {45 alert(`Sir, your ${cpuModel} has only ${avaliableCores} cores.`);46 return;47 }48 } catch (err) {49 alert('Use integer values only in custom cores.');50 }51 } else if (twoThread.checked) nCoresToUse = 2;52 // verify all inputs53 if (54 inputDown.value === '' || inputRele.value === '' || inputHotk.value === ''55 ) {56 alert('Fill all inputs!');57 } else {58 saveButton.innerHTML = 'Saving...';59 const objectConfig = {60 hold_delay: inputDown.value,61 release_delay: inputRele.value,62 hotkey: inputHotk.value.toLowerCase(),63 cores_to_use: nCoresToUse,64 god_mode: radioGodMode.checked,65 };66 window.config.save(objectConfig);67 setTimeout(() => {68 saveButton.innerHTML = 'Saved!';69 alert('Restart app to apply new configs!');70 }, 3);71 }72}73function changeMacroState() {74 const arrayInput = document.querySelectorAll('input');75 const enable = (btnMacro.textContent === 'START');76 if (window.cpu.getCores() >= inputCores.value) {77 btnMacro.innerHTML = (enable) ? 'STOP' : 'START';78 arrayInput.forEach((input) => {79 const inputVar = input;80 inputVar.disabled = enable;81 inputVar.contentEditable = !enable;82 });83 window.macro.changeState();84 } else {85 alert(`Select a number of cores less or equal than ${window.cpu.getCores()}`);86 }87}88// LAYOUT FUNCTIONS89function changeState() {90 if (saveButton.textContent === BTN_NAME[BTN_CHANGED]) {91 saveButton.innerText = BTN_NAME[BTN_NORMAL];92 }93}94function toUpper() {95 inputHotk.value = inputHotk.value.toUpperCase();...
CommonBean.js
Source: CommonBean.js
...22var writeDownloadInfo = function() {23 fs.writeFileSync(downloadInfoPath, JSON.stringify(downloadInfo));24}25//é
置信æ¯26var configs = readConfigs();27/**28 * ä¸è½½ç¸å
³ä¿¡æ¯29 * ç³»ç»å¯å¨æ¶ä»æ°æ®æ件åºåå°å
å30 * 该对象信æ¯åæ´åæ¥æ´æ°æ°æ®æ件31 * */32var downloadInfo = readDownloadInfo();33//æ ¡éªæ°æ®ææ éå¤34var checkRepeat = function(obj) {35 downloadInfo.forEach(function(item) {36 if(obj.fileName == item.fileName) {37 return "åå¨ç¸åçæ件å称ï¼æ¯å¦ç»§ç»ï¼";38 }39 if(obj.downloadPath == item.downloadPath) {40 return "åå¨ç¸åçä¸è½½ä»»å¡ï¼æ¯å¦ç»§ç»ï¼";...
validRequest.js
Source: validRequest.js
1const readConfigs = require("../configs/readConfigs");2const ReadConfigs = new readConfigs();3ReadConfigs.getAllServicesPingEndpoints()4const validateRequest = (req, res, next) => {5 const url = req.path;6 const method = req.method;7 const contextRoot = "/" + url.split("/")[1];8 const path = url.replace(contextRoot, "");9 const destinationService = ReadConfigs.getDestinationService(contextRoot, path, method);10 if(!destinationService.isValid) {11 return res.status(400).send({12 error: 'Your request is not valid !!'13 })14 }15 req.destinationService = destinationService16 req.destinationPath = path...
env.js
Source: env.js
...14 .read(path.resolve(path.join(__dirname, '..', '..', 'configs/', filename+'.json')));15};16module.exports = {17 readConfigs: readConfigs,18 current: readConfigs(env)...
index.js
Source: index.js
1'use strict';2let fs = require('../helpers/fs');3let ReadConfigs = require('../helpers/readConfigs');4class Config {5 constructor(env) {6 this.env = env;7 this.configs = fs.requireRecursivly(__dirname);8 }9 get(key) {10 if (key == 'all') return this.configs;11 try {12 return this.configs[key];13 }14 catch(e) {15 console.error(e);16 return e;17 }18 }19}...
readConfigs.js
Source: readConfigs.js
1'use strict';2let readDirFiles = require('read-dir-files');3let winston = require('winston');4class ReadConfigs {5 constructor(path) {6 this.path = path;7 this.read = readDirFiles.read;8 }9 readDir() {10 this.read(this.path, (err, files) => {11 if (err) return console.dir(err);12 return files;13 });14 }15}...
readConfigs.test.js
Source: readConfigs.test.js
1// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.2import {readConfigs} from '../index';3test('readConfigs() throws when called without project paths', () => {4 expect(() => {5 readConfigs(null /* argv */, [] /* projectPaths */);6 }).toThrowError('jest: No configuration found for any project.');...
configs.js
Source: configs.js
...4function readConfigs (filename) {5 return eson()6 .read(path.join(__dirname, '/configs/', filename+'.json'));7}8module.exports = readConfigs(env);...
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Since Jest tests are runtime tests, they only have access to runtime information. You're trying to use a type, which is compile-time information. TypeScript should already be doing the type aspect of this for you. (More on that in a moment.)
The fact the tests only have access to runtime information has a couple of ramifications:
If it's valid for getAll
to return an empty array (because there aren't any entities to get), the test cannot tell you whether the array would have had Entity
elements in it if it hadn't been empty. All it can tell you is it got an array.
In the non-empty case, you have to check every element of the array to see if it's an Entity
. You've said Entity
is a class, not just a type, so that's possible. I'm not a user of Jest (I should be), but it doesn't seem to have a test specifically for this; it does have toBeTruthy
, though, and we can use every
to tell us if every element is an Entity
:
it('should return an array of Entity class', async () => {
const all = await service.getAll()
expect(all.every(e => e instanceof Entity)).toBeTruthy();
});
Beware, though, that all calls to every
on an empty array return true
, so again, that empty array issue raises its head.
If your Jest tests are written in TypeScript, you can improve on that by ensuring TypeScript tests the compile-time type of getAll
's return value:
it('should return an array of Entity class', async () => {
const all: Entity[] = await service.getAll()
// ^^^^^^^^^^
expect(all.every(e => e instanceof Entity)).toBeTruthy();
});
TypeScript will complain about that assignment at compile time if it's not valid, and Jest will complain at runtime if it sees an array containing a non-Entity
object.
But jonrsharpe has a good point: This test may not be useful vs. testing for specific values that should be there.
Check out the latest blogs from LambdaTest on this topic:
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|<p>it('check_object_of_Car', () => {</p><p>
expect(newCar()).toBeInstanceOf(Car);</p><p>
});</p>|
| :- |
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