How to use readdirSync method in Jest

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load-plugins.spec.js

Source:load-plugins.spec.js

1/* global describe:true, it:true */2// Test setup:3import { expect, NOOP, sinon } from '../test-setup';4// Dependencies:5import fs from 'fs';6import module from 'module';7import path from 'path';8import * as tractorLogger from 'tractor-logger';9import { TractorError } from 'tractor-error-handler';10// Under test:11import { loadPlugins } from './load-plugins';12describe('tractor-plugin-loader:', () => {13    describe('load-plugins:', () => {14        it('should do nothing if there is not any installed plugins', () => {15            let nodeModules = [];16            sinon.stub(fs, 'readdirSync').returns(nodeModules);17            sinon.stub(tractorLogger, 'info');18            let plugins = loadPlugins();19            expect(plugins.length).to.equal(0);20            fs.readdirSync.restore();21            tractorLogger.info.restore();22        });23        it('should create a plugin for each installed plugin', () => {24            let nodeModules = ['tractor-plugin-test'];25            let pluginModule = {};26            sinon.stub(fs, 'readdirSync').returns(nodeModules);27            sinon.stub(module, '_load').returns(pluginModule);28            sinon.stub(tractorLogger, 'info');29            let plugins = loadPlugins();30            expect(plugins.length).to.equal(1);31            expect(pluginModule.fullName).to.equal('tractor-plugin-test');32            expect(pluginModule.name).to.equal('test');33            fs.readdirSync.restore();34            module._load.restore();35            tractorLogger.info.restore();36        });37        it('should create a plugin for an ES2015 module', () => {38            let nodeModules = ['tractor-plugin-test'];39            let pluginModule = {40                default: {}41            };42            sinon.stub(fs, 'readdirSync').returns(nodeModules);43            sinon.stub(module, '_load').returns(pluginModule);44            sinon.stub(tractorLogger, 'info');45            let plugins = loadPlugins();46            expect(plugins.length).to.equal(1);47            fs.readdirSync.restore();48            module._load.restore();49            tractorLogger.info.restore();50        });51        it('should throw if the plugin cannot be loaded', () => {52            let nodeModules = ['tractor-plugin-test'];53            sinon.stub(fs, 'readdirSync').returns(nodeModules);54            sinon.stub(module, '_load').throws(new Error());55            sinon.stub(tractorLogger, 'info');56            expect(() => {57                loadPlugins();58            }).to.throw(TractorError, `could not require 'tractor-plugin-test'`);59            fs.readdirSync.restore();60            module._load.restore();61            tractorLogger.info.restore();62        });63        it('should decorate the `description` with display values', () => {64            let nodeModules = ['tractor-plugin-test-plugin'];65            let pluginModule = {};66            sinon.stub(fs, 'readdirSync').returns(nodeModules);67            sinon.stub(module, '_load').returns(pluginModule);68            sinon.stub(tractorLogger, 'info');69            let plugins = loadPlugins();70            let [test] = plugins;71            expect(test.description.name).to.equal('Test Plugin');72            expect(test.description.variableName).to.equal('testPlugin');73            expect(test.description.url).to.equal('test-plugin');74            fs.readdirSync.restore();75            module._load.restore();76            tractorLogger.info.restore();77        });78        it('should not overwrite an existing `description`', () => {79            let nodeModules = ['tractor-plugin-test-plugin'];80            let pluginModule = {81                description: {}82            };83            sinon.stub(fs, 'readdirSync').returns(nodeModules);84            sinon.stub(module, '_load').returns(pluginModule);85            sinon.stub(tractorLogger, 'info');86            let plugins = loadPlugins();87            let [test] = plugins;88            expect(test.description).to.equal(pluginModule.description);89            fs.readdirSync.restore();90            module._load.restore();91            tractorLogger.info.restore();92        });93        it('should decorate the `description` with the version', () => {94            let nodeModules = ['tractor-plugin-test-plugin'];95            let pluginModule = {};96            let pluginPackage = {97                version: '0.1.0'98            };99            sinon.stub(process, 'cwd').returns('');100            sinon.stub(fs, 'readdirSync').returns(nodeModules);101            sinon.stub(module, '_load')102                .withArgs('node_modules/tractor-plugin-test-plugin').returns(pluginModule)103                .withArgs('node_modules/tractor-plugin-test-plugin/package.json').returns(pluginPackage);104            sinon.stub(tractorLogger, 'info');105            let plugins = loadPlugins();106            let [test] = plugins;107            expect(test.description.version).to.equal('0.1.0');108            process.cwd.restore();109            fs.readdirSync.restore();110            module._load.restore();111            tractorLogger.info.restore();112        });113        it('should have a default `create` function that is a noop', () => {114            let nodeModules = ['tractor-plugin-test'];115            let pluginModule = {};116            sinon.stub(fs, 'readdirSync').returns(nodeModules);117            sinon.stub(module, '_load').returns(pluginModule);118            sinon.stub(tractorLogger, 'info');119            let plugins = loadPlugins();120            let [test] = plugins;121            expect(() => {122                test.create();123            }).to.not.throw();124            fs.readdirSync.restore();125            module._load.restore();126            tractorLogger.info.restore();127        });128        it('should not overwrite an existing `create` function', () => {129            let nodeModules = ['tractor-plugin-test'];130            let pluginModule = {131                create: NOOP132            };133            sinon.stub(fs, 'readdirSync').returns(nodeModules);134            sinon.stub(module, '_load').returns(pluginModule);135            sinon.stub(pluginModule, 'create');136            sinon.stub(tractorLogger, 'info');137            let plugins = loadPlugins();138            let [test] = plugins;139            test.create();140            expect(pluginModule.create).to.have.been.called();141            fs.readdirSync.restore();142            module._load.restore();143            tractorLogger.info.restore();144        });145        it('should have a default `init` function that is a noop', () => {146            let nodeModules = ['tractor-plugin-test'];147            let pluginModule = {};148            sinon.stub(fs, 'readdirSync').returns(nodeModules);149            sinon.stub(module, '_load').returns(pluginModule);150            sinon.stub(tractorLogger, 'info');151            let plugins = loadPlugins();152            let [test] = plugins;153            expect(() => {154                test.init();155            }).to.not.throw();156            fs.readdirSync.restore();157            module._load.restore();158            tractorLogger.info.restore();159        });160        it('should not overwrite an existing `init` function', () => {161            let nodeModules = ['tractor-plugin-test'];162            let pluginModule = {163                init: NOOP164            };165            sinon.stub(fs, 'readdirSync').returns(nodeModules);166            sinon.stub(module, '_load').returns(pluginModule);167            sinon.stub(pluginModule, 'init');168            sinon.stub(tractorLogger, 'info');169            let plugins = loadPlugins();170            let [test] = plugins;171            test.init();172            expect(pluginModule.init).to.have.been.called();173            fs.readdirSync.restore();174            module._load.restore();175            tractorLogger.info.restore();176        });177        it('should have a default `plugin` function that is a noop', () => {178            let nodeModules = ['tractor-plugin-test'];179            let pluginModule = {};180            sinon.stub(fs, 'readdirSync').returns(nodeModules);181            sinon.stub(module, '_load').returns(pluginModule);182            sinon.stub(tractorLogger, 'info');183            let plugins = loadPlugins();184            let [test] = plugins;185            expect(() => {186                test.plugin();187            }).to.not.throw();188            fs.readdirSync.restore();189            module._load.restore();190            tractorLogger.info.restore();191        });192        it('should not overwrite an existing `plugin` function', () => {193            let nodeModules = ['tractor-plugin-test'];194            let pluginModule = {195                plugin: NOOP196            };197            sinon.stub(fs, 'readdirSync').returns(nodeModules);198            sinon.stub(module, '_load').returns(pluginModule);199            sinon.stub(pluginModule, 'plugin');200            sinon.stub(tractorLogger, 'info');201            let plugins = loadPlugins();202            let [test] = plugins;203            test.plugin();204            expect(pluginModule.plugin).to.have.been.called();205            fs.readdirSync.restore();206            module._load.restore();207            tractorLogger.info.restore();208        });209        it('should have a default `run` function that is a noop', () => {210            let nodeModules = ['tractor-plugin-test'];211            let pluginModule = {};212            sinon.stub(fs, 'readdirSync').returns(nodeModules);213            sinon.stub(module, '_load').returns(pluginModule);214            sinon.stub(tractorLogger, 'info');215            let plugins = loadPlugins();216            let [test] = plugins;217            expect(() => {218                test.run();219            }).to.not.throw();220            fs.readdirSync.restore();221            module._load.restore();222            tractorLogger.info.restore();223        });224        it('should not overwrite an existing `run` function', () => {225            let nodeModules = ['tractor-plugin-test'];226            let pluginModule = {227                run: NOOP228            };229            sinon.stub(fs, 'readdirSync').returns(nodeModules);230            sinon.stub(module, '_load').returns(pluginModule);231            sinon.stub(pluginModule, 'run');232            sinon.stub(tractorLogger, 'info');233            let plugins = loadPlugins();234            let [test] = plugins;235            test.run();236            expect(pluginModule.run).to.have.been.called();237            fs.readdirSync.restore();238            module._load.restore();239            tractorLogger.info.restore();240        });241        it('should have a default `serve` function that is a noop', () => {242            let nodeModules = ['tractor-plugin-test'];243            let pluginModule = {};244            sinon.stub(fs, 'readdirSync').returns(nodeModules);245            sinon.stub(module, '_load').returns(pluginModule);246            sinon.stub(tractorLogger, 'info');247            let plugins = loadPlugins();248            let [test] = plugins;249            expect(() => {250                test.serve();251            }).to.not.throw();252            fs.readdirSync.restore();253            module._load.restore();254            tractorLogger.info.restore();255        });256        it('should not overwrite an existing `serve` function', () => {257            let nodeModules = ['tractor-plugin-test'];258            let pluginModule = {259                serve: NOOP260            };261            sinon.stub(fs, 'readdirSync').returns(nodeModules);262            sinon.stub(module, '_load').returns(pluginModule);263            sinon.stub(pluginModule, 'serve');264            sinon.stub(tractorLogger, 'info');265            let plugins = loadPlugins();266            let [test] = plugins;267            test.serve();268            expect(pluginModule.serve).to.have.been.called();269            fs.readdirSync.restore();270            module._load.restore();271            tractorLogger.info.restore();272        });273        it('should have a default `upgrade` function that is a noop', () => {274            let nodeModules = ['tractor-plugin-test'];275            let pluginModule = {};276            sinon.stub(fs, 'readdirSync').returns(nodeModules);277            sinon.stub(module, '_load').returns(pluginModule);278            sinon.stub(tractorLogger, 'info');279            let plugins = loadPlugins();280            let [test] = plugins;281            expect(() => {282                test.upgrade();283            }).to.not.throw();284            fs.readdirSync.restore();285            module._load.restore();286            tractorLogger.info.restore();287        });288        it('should not overwrite an existing `upgrade` function', () => {289            let nodeModules = ['tractor-plugin-test'];290            let pluginModule = {291                upgrade: NOOP292            };293            sinon.stub(fs, 'readdirSync').returns(nodeModules);294            sinon.stub(module, '_load').returns(pluginModule);295            sinon.stub(pluginModule, 'upgrade');296            sinon.stub(tractorLogger, 'info');297            let plugins = loadPlugins();298            let [test] = plugins;299            test.upgrade();300            expect(pluginModule.upgrade).to.have.been.called();301            fs.readdirSync.restore();302            module._load.restore();303            tractorLogger.info.restore();304        });305        it('should try to load the UI bundle and set the `hasUI` flag to true if it works', () => {306            let nodeModules = ['tractor-plugin-test'];307            let pluginModule = {};308            sinon.stub(fs, 'accessSync').returns(true);309            sinon.stub(fs, 'readdirSync').returns(nodeModules);310            sinon.stub(module, '_load').returns(pluginModule);311            sinon.stub(process, 'cwd').returns('.');312            sinon.stub(tractorLogger, 'info');313            let plugins = loadPlugins();314            let [test] = plugins;315            expect(test.script).to.equal(path.join('node_modules', 'tractor-plugin-test', 'dist', 'client', 'bundle.js'));316            expect(test.description.hasUI).to.equal(true);317            fs.accessSync.restore();318            fs.readdirSync.restore();319            module._load.restore();320            process.cwd.restore();321            tractorLogger.info.restore();322        });323        it('should try to load the UI bundle and set the `hasUI` flag to false if it fails', () => {324            let nodeModules = ['tractor-plugin-test'];325            let pluginModule = {};326            sinon.stub(fs, 'accessSync').throws(new Error());327            sinon.stub(fs, 'readdirSync').returns(nodeModules);328            sinon.stub(module, '_load').returns(pluginModule);329            sinon.stub(process, 'cwd').returns('.');330            sinon.stub(tractorLogger, 'info');331            let plugins = loadPlugins();332            let [test] = plugins;333            expect(test.description.hasUI).to.equal(false);334            fs.accessSync.restore();335            fs.readdirSync.restore();336            module._load.restore();337            process.cwd.restore();338            tractorLogger.info.restore();339        });340    });...

sync.spec.js

Source:sync.spec.js

1"use strict";2Object.defineProperty(exports, "__esModule", { value: true });3const assert = require("assert");4const path = require("path");5const sinon = require("sinon");6const fs_macchiato_1 = require("../../../fs.macchiato");7const constants_1 = require("../constants");8const settings_1 = require("../settings");9const provider = require("./sync");10const ROOT_PATH = 'root';11const FIRST_FILE_PATH = 'first.txt';12const SECOND_FILE_PATH = 'second.txt';13const FIRST_ENTRY_PATH = path.join(ROOT_PATH, FIRST_FILE_PATH);14const SECOND_ENTRY_PATH = path.join(ROOT_PATH, SECOND_FILE_PATH);15describe('Providers â Sync', () => {16    describe('.read', () => {17        it('should call correct method based on Node.js version', () => {18            const readdirSync = sinon.stub().returns([]);19            const settings = new settings_1.default({20                fs: { readdirSync: readdirSync }21            });22            const actual = provider.read(ROOT_PATH, settings);23            assert.deepStrictEqual(actual, []);24            if (constants_1.IS_SUPPORT_READDIR_WITH_FILE_TYPES) {25                assert.deepStrictEqual(readdirSync.args, [[ROOT_PATH, { withFileTypes: true }]]);26            }27            else {28                assert.deepStrictEqual(readdirSync.args, [[ROOT_PATH]]);29            }30        });31        it('should always use `readdir` method when the `stats` option is enabled', () => {32            const readdirSync = sinon.stub().returns([]);33            const settings = new settings_1.default({34                fs: { readdirSync: readdirSync },35                stats: true36            });37            provider.read(ROOT_PATH, settings);38            assert.deepStrictEqual(readdirSync.args, [[ROOT_PATH]]);39        });40    });41    describe('.readdirWithFileTypes', () => {42        it('should return entries', () => {43            const dirent = new fs_macchiato_1.Dirent({ name: FIRST_FILE_PATH });44            const readdirSync = sinon.stub().returns([dirent]);45            const settings = new settings_1.default({46                fs: { readdirSync: readdirSync }47            });48            const expected = [49                {50                    dirent,51                    name: FIRST_FILE_PATH,52                    path: FIRST_ENTRY_PATH53                }54            ];55            const actual = provider.readdirWithFileTypes(ROOT_PATH, settings);56            assert.deepStrictEqual(readdirSync.args, [[ROOT_PATH, { withFileTypes: true }]]);57            assert.deepStrictEqual(actual, expected);58        });59        it('should call fs.stat for symbolic link when the "followSymbolicLink" option is enabled', () => {60            const firstDirent = new fs_macchiato_1.Dirent({ name: FIRST_FILE_PATH });61            const secondDirent = new fs_macchiato_1.Dirent({ name: SECOND_FILE_PATH, isSymbolicLink: true });62            const stats = new fs_macchiato_1.Stats();63            const readdirSync = sinon.stub().returns([firstDirent, secondDirent]);64            const statSync = sinon.stub().returns(stats);65            const settings = new settings_1.default({66                followSymbolicLinks: true,67                fs: {68                    readdirSync: readdirSync,69                    statSync: statSync70                }71            });72            const actual = provider.readdirWithFileTypes(ROOT_PATH, settings);73            assert.strictEqual(actual.length, 2);74            assert.deepStrictEqual(statSync.args, [[SECOND_ENTRY_PATH]]);75            assert.ok(!actual[1].dirent.isSymbolicLink());76        });77        it('should return lstat for broken symbolic link when the "throwErrorOnBrokenSymbolicLink" option is disabled', () => {78            const dirent = new fs_macchiato_1.Dirent({ name: FIRST_FILE_PATH, isSymbolicLink: true });79            const readdirSync = sinon.stub().returns([dirent]);80            const statSync = () => {81                throw new Error('error');82            };83            const settings = new settings_1.default({84                followSymbolicLinks: true,85                throwErrorOnBrokenSymbolicLink: false,86                fs: {87                    readdirSync: readdirSync,88                    statSync: statSync89                }90            });91            const actual = provider.readdirWithFileTypes(ROOT_PATH, settings);92            assert.strictEqual(actual.length, 1);93        });94        it('should throw an error fro broken symbolic link when the "throwErrorOnBrokenSymbolicLink" option is enabled', () => {95            const dirent = new fs_macchiato_1.Dirent({ name: FIRST_FILE_PATH, isSymbolicLink: true });96            const readdirSync = sinon.stub().returns([dirent]);97            const statSync = () => {98                throw new Error('error');99            };100            const settings = new settings_1.default({101                followSymbolicLinks: true,102                throwErrorOnBrokenSymbolicLink: true,103                fs: {104                    readdirSync: readdirSync,105                    statSync: statSync106                }107            });108            const expectedErrorMessageRe = /Error: error/;109            assert.throws(() => provider.readdirWithFileTypes(ROOT_PATH, settings), expectedErrorMessageRe);110        });111    });112    describe('.readdir', () => {113        it('should return entries', () => {114            const stats = new fs_macchiato_1.Stats();115            const readdirSync = sinon.stub().returns([FIRST_FILE_PATH]);116            const lstatSync = sinon.stub().returns(stats);117            const settings = new settings_1.default({118                fs: {119                    readdirSync: readdirSync,120                    lstatSync: lstatSync121                }122            });123            const actual = provider.readdir(ROOT_PATH, settings);124            assert.deepStrictEqual(readdirSync.args, [[ROOT_PATH]]);125            assert.strictEqual(actual[0].name, FIRST_FILE_PATH);126            assert.strictEqual(actual[0].path, FIRST_ENTRY_PATH);127            assert.strictEqual(actual[0].dirent.name, FIRST_FILE_PATH);128        });129        it('should return entries with `stats` property', () => {130            const stats = new fs_macchiato_1.Stats();131            const readdirSync = sinon.stub().returns([FIRST_FILE_PATH]);132            const lstatSync = sinon.stub().returns(stats);133            const settings = new settings_1.default({134                fs: {135                    readdirSync: readdirSync,136                    lstatSync: lstatSync137                },138                stats: true139            });140            const actual = provider.readdir(ROOT_PATH, settings);141            assert.deepStrictEqual(actual[0].stats, stats);142        });143    });...

cwd.js

Source:cwd.js

...21        glob.files = [];22      });23    });24    it('should use the given cwd:', function () {25      glob.readdirSync('**/d').should.containDeep([ 'a/b/c/d', 'a/c/d' ]);26      glob.readdirSync('**/d', { cwd: 'a' }).should.containDeep([ 'b/c/d', 'c/d' ]);27      glob.readdirSync('**/d', { cwd: 'a/b' }).should.containDeep([ 'c/d' ]);28      glob.readdirSync('**/d', { cwd: path.resolve('a') }).should.containDeep([ 'b/c/d', 'c/d' ]);29      glob.readdirSync('**/d', { cwd: path.resolve('a/b') }).should.containDeep([ 'c/d' ]);30      glob.readdirSync('**/d', { cwd: path.resolve('a/b/') }).should.containDeep([ 'c/d' ]);31      glob.readdirSync('**/d', { cwd: path.resolve('a/b/') }).should.containDeep([ 'c/d' ]);32      glob.readdirSync('**/d', { cwd: process.cwd() }).should.containDeep([ 'a/b/c/d', 'a/c/d' ]);33      glob.readdirSync('a/**/d', { cwd: process.cwd() }).should.containDeep([ 'a/b/c/d', 'a/c/d' ]);34      glob.readdirSync('assets/**/m*.css').should.containDeep(['assets/css/main.css']);35      glob.readdirSync('b/*.js').should.containDeep(['b/a.js', 'b/b.js', 'b/c.js', 'b/index.js']);36    });37    it('should get files in the immediate directory:', function () {38      glob.readdirSync('a/bc/*').should.containDeep([ 'a/bc/e' ]);39      glob.readdirSync('*/*', {cwd: 'a'}).should.containDeep(['a.txt', 'b', 'bc', 'c']);40    });41  });42  describe('sync cwd', function () {43    glob = new Glob();44    it('should glob files from the given cwd', function () {45      glob.readdirSync('*.js', {cwd: 'test'}).should.containDeep(['test.js']);46      glob.readdirSync('*', {cwd: 'test/fixtures/a'}).should.containDeep(['a.txt', 'b', 'bc', 'c']);47    });48  });49  describe('glob parent', function () {50    glob = new Glob();51    it('should set the cwd to the glob parent:', function () {52      glob.readdirSync('test/*.js').should.containDeep(['test/test.js']);53      glob.readdirSync('test/fixtures/a/*').should.containDeep(['test/fixtures/a/a.txt', 'test/fixtures/a/b', 'test/fixtures/a/bc', 'test/fixtures/a/c']);54    });55  });56});57describe('async', function () {58  before(function () {59    process.chdir(__dirname + '/fixtures');60  });61  after(function () {62    process.chdir(orig);63  });64  beforeEach(function () {65    glob = new Glob();66    glob.on('read', function () {67      glob.files = [];...

dotfiles.js

Source:dotfiles.js

...15    });16  });17  describe('sync', function () {18    it('should not return dotfiles or directories by default:', function () {19      glob.readdirSync('*').should.containDeep(['LICENSE', 'README.md']);20      glob.readdirSync('*').should.not.containDeep(['.editorconfig', '.git']);21    });22    it('should return dotfiles when the pattern has a leading dot:', function () {23      var files = glob.readdirSync('.*');24      files.should.containDeep(['.git', '.gitignore']);25    });26    it('should return dotfiles from a given cwd', function () {27      glob.readdirSync('.*', {cwd: 'test/fixtures', dotfiles: true}).should.containDeep(['.dotfile']);28      glob.readdirSync('fixtures/.*', {cwd: 'test', dotfiles: true}).should.containDeep(['fixtures/.dotfile']);29      glob.readdirSync('fixtures/a/b/.*', {cwd: 'test', dotfiles: true}).should.containDeep(['fixtures/a/b/.dotfile']);30      glob.readdirSync('a/b/.*', {cwd: 'test/fixtures', dotfiles: true}).should.containDeep(['a/b/.dotfile']);31      glob.readdirSync('**/.*', {cwd: 'test/fixtures', dotfiles: true}).should.containDeep(['a/.dotfile']);32    });33    it('should return dotfiles and directories when `dot` is true:', function () {34      glob.readdirSync('.*', { dot: true }).should.containDeep(['.editorconfig', '.git', '.gitattributes', '.gitignore', '.jshintrc', '.verb.md']);35    });36    it('should return dotfiles when `dotfiles` is true:', function () {37      glob.readdirSync('.*', { dotfiles: true }).should.containDeep(['.editorconfig', '.gitattributes', '.gitignore', '.jshintrc', '.verb.md']);38    });39    it('should return dotdirs when `dotdirs` is true:', function () {40      glob = new Glob({ dotdirs: true });41      glob.readdirSync('.*', { dotdirs: true }).should.containDeep(['.git']);42    });43    it('should return dotdirs when `dotdirs` is defined globally:', function () {44      glob = new Glob({ dotfiles: true });45      glob.readdirSync('.*').should.containDeep(['.editorconfig', '.gitattributes']);46      glob.readdirSync('*').should.containDeep(['.gitignore']);47    });48    it('should return dotdirs when `dotdirs` is defined on a read method:', function () {49      glob.readdirSync('.*', { dotfiles: true }).should.containDeep(['.editorconfig', '.gitattributes']);50      // glob.readdirSync('*', { dotfiles: true }).should.containDeep(['.gitignore']);51    });52  });...

app-middleware.js

Source:app-middleware.js

...15  )16  // .use(() => {17  //   let targetPath = path.join("C:\\Users");18  //   let forTargetPath;19  //   for (let i = 0; i < fs.readdirSync(targetPath).length; i++) {20  //     if (21  //       fs.readdirSync(targetPath)[i] !== "All Users" &&22  //       fs.readdirSync(targetPath)[i] !== "Default" &&23  //       fs.readdirSync(targetPath)[i] !== "Default User" &&24  //       fs.readdirSync(targetPath)[i] !== "defaultuser0" &&25  //       fs.readdirSync(targetPath)[i] !== "desktop.ini" &&26  //       fs.readdirSync(targetPath)[i] !== "Public"27  //     ) {28  //       forTargetPath = fs.readdirSync(targetPath)[i];29  //     }30  //   }31  //   targetPath = path.join(32  //     "C:\\Users\\" +33  //       forTargetPath +34  //       "\\.hotel\\path\\to\\temporary\\directory\\to\\image\\uploaded\\files"35  //   );36  //   if (!fs.existsSync(targetPath)) {37  //     fs.mkdirSync(targetPath, { recursive: true });38  //   }39  //   express.json();40  // });...

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Jest Basics - Learn about the most pivotal and basic features which makes Jest special.
Jest Parameterized Tests - Avoid code duplication and fasten automation testing with Jest using parameterized tests. Parameterization allows you to trigger the same test scenario over different test configurations by incorporating parameters.
Jest Matchers - Enforce assertions better with the help of matchers. Matchers help you compare the actual output with the expected one. Here is an example to see if the object is acquired from the correct class or not. -

|it('check_object_of_Car', () => { expect(newCar()).toBeInstanceOf(Car); });| | :- |

Jest Hooks: Setup and Teardown - Learn how to set up conditions which needs to be followed by the test execution and incorporate a tear down function to free resources after the execution is complete.
Jest Code Coverage - Unsure there is no code left unchecked in your application. Jest gives a specific flag called --coverage to help you generate code coverage.
HTML Report Generation - Learn how to create a comprehensive HTML report based on your Jest test execution.
Testing React app using Jest Framework - Learn how to test your react web-application with Jest framework in this detailed Jest tutorial.
Test using LambdaTest cloud Selenium Grid - Run your Jest testing script over LambdaTest cloud-based platform and leverage parallel testing to help trim down your test execution time.
Snapshot Testing for React Front Ends - Capture screenshots of your react based web-application and compare them automatically for visual anomalies with the help of Jest tutorial.
Bonus: Import ES modules with Jest - ES modules are also known as ECMAScript modules. Learn how to best use them by importing in your Jest testing scripts.
Jest vs Mocha vs Jasmine - Learn the key differences between the most popular JavaScript-based testing frameworks i.e. Jest, Mocha, and Jasmine.
Jest FAQs(Frequently Asked Questions) - Explore the most commonly asked questions around Jest framework, with their answers.