Testing JavaScript with Kent C. Dodds

14h 11m 26s
English
Paid
May 18, 2023

This course will apply the four-layer testing method to a React application, but this foundational strategy can be applied across any JavaScript framework: Angular, Vue, legacy Backbone apps, even frameworks and libraries we haven’t met yet.

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# Title Duration
1 Intro to Fundamentals of Testing in JavaScript 00:33
2 Throw an Error with a Simple Test in JavaScript 01:42
3 Abstract Test Assertions into a JavaScript Assertion Library 01:36
4 Encapsulate and Isolate Tests by building a JavaScript Testing Framework 02:28
5 Support Async Tests with JavaScripts Promises through async await 01:06
6 Provide Testing Helper Functions as Globals in JavaScript 00:55
7 Verify Custom JavaScript Tests with Jest 00:38
8 Intro to JavaScript Mocking Fundamentals 02:41
9 Override Object Properties to Mock with Monkey-patching in JavaScript 02:05
10 Ensure Functions are Called Correctly with JavaScript Mocks 03:21
11 Restore the Original Implementation of a Mocked JavaScript Function with jest.spyOn 02:13
12 Mock a JavaScript module in a test 03:39
13 Make a shared JavaScript mock module 01:58
14 Intro to Static Analysis Testing JavaScript Applications 01:00
15 Lint JavaScript by Configuring and Running ESLint 04:41
16 Use the ESLint Extension for VSCode 01:18
17 Use pre-built ESLint Configuration using extends 02:01
18 Run ESLint with npm Scripts 02:19
19 Format Code by Installing and Running Prettier 02:56
20 Configure Prettier 02:13
21 Use the Prettier Extension for VSCode 01:47
22 Disable Unnecessary ESLint Stylistic Rules with eslint-config-prettier 02:26
23 Validate All Files are Properly Formatted with Prettier 03:11
24 Avoid Common Errors by Installing and Configuring TypeScript 05:30
25 Make ESLint Support TypeScript Files 05:29
26 Validate Code in a pre-commit git Hook with husky 02:47
27 Auto-format All Files and Validate Relevant Files in a precommit Script with lint-staged 04:19
28 Run Multiple npm Scripts in Parallel with npm-run-all 01:17
29 Intro to Use DOM Testing Library to test any JS framework 02:02
30 Use DOM Testing Library with React 02:02
31 Use DOM Testing Library with Preact 02:14
32 Use DOM Testing Library with jQuery 00:40
33 Use DOM Testing Library with Dojo 01:26
34 Use DOM Testing Library with HyperApp 01:33
35 Use DOM Testing Library with AngularJS 01:03
36 Use DOM Testing Library with Angular 01:29
37 Use DOM Testing Library with VueJS 00:57
38 Use DOM Testing Library with Mithril 01:09
39 Use DOM Testing Library with from-html 01:08
40 Use DOM Testing Library with Svelte 01:39
41 Intro to Configure Jest for Testing JavaScript Applications 02:24
42 Install and Run Jest 02:48
43 Compile Modules with Babel in Jest Tests 02:54
44 Configure Jest’s Test Environment for Testing Node or Browser Code 02:40
45 Support Importing CSS files with Jest’s moduleNameMapper 03:42
46 Support using Webpack CSS Modules with Jest 03:39
47 Generate a Serializable Value with Jest Snapshots 08:37
48 Test an Emotion Styled UI with Custom Jest Snapshot Serializers 02:22
49 Support Custom Module Resolution with Jest moduleDirectories 02:29
50 Configure Jest to Run Setup for All Tests with Jest setupFilesAfterEnv 02:54
51 Support a Test Utilities File with Jest moduleDirectories 10:58
52 Use Jest Watch Mode to Speed Up Development 07:15
53 Step through Code in Jest using the Node.js Debugger and Chrome DevTools 04:15
54 Configure Jest to Report Code Coverage on Project Files 04:41
55 Analyze Jest Code Coverage Reports 04:36
56 Set a Code Coverage Threshold in Jest to Maintain Code Coverage Levels 04:27
57 Report Jest Test Coverage to Codecov through TravisCI 01:42
58 Run Jest Watch Mode by Default Locally with is-ci-cli 02:10
59 Run Tests with a Different Configuration using Jest’s --config Flag and testMatch Option 06:34
60 Support Running Multiple Configurations with Jest’s Projects Feature 04:19
61 Run ESLint with Jest using jest-runner-eslint 04:38
62 Test Specific Projects in Jest Watch Mode with jest-watch-select-projects 02:25
63 Filter which Tests are Run with Typeahead Support in Jest Watch Mode 02:24
64 Run Only Relevant Jest Tests on Git Commit to Avoid Breakages 04:10
65 What's changed in Test React Components with Jest and React Testing Library 05:12
66 Intro to Test React Components with Jest and React Testing Library 01:43
67 Render a React Component for Testing 02:29
68 Use Jest DOM for Improved Assertions 03:08
69 Use DOM Testing Library to Write More Maintainable React Tests 04:19
70 Use React Testing Library to Render and Test React Components 01:32
71 Debug the DOM State During Tests using React Testing Library’s debug Function 01:11
72 Test React Component Event Handlers with fireEvent from React Testing Library 03:09
73 Improve Test Confidence with the User Event Module 01:30
74 Test Prop Updates with React Testing Library 01:05
75 Assert That Something is NOT Rendered with React Testing Library 02:01
76 Test Accessibility of Rendered React Components with jest-axe 03:18
77 Test componentDidCatch Handler Error Boundaries with React Testing Library 06:18
78 Hide console.error Logs when Testing Error Boundaries with jest.spyOn 02:56
79 Ensure Error Boundaries Can Successfully Recover from Errors 03:58
80 Mock react-transition-group in React Component Tests with jest.mock 04:56
81 Use React Testing Library’s Wrapper Option to Simplify using rerender 01:11
82 Mock HTTP Requests with jest.mock in React Component Tests 06:44
83 Mock HTTP Requests with MSW 06:45
84 Test Drive the Development of a React Form with React Testing Library 03:11
85 Test Drive the Submission of a React Form with React Testing Library 01:38
86 Test Drive the API Call of a React Form with React Testing Library 06:50
87 Test Drive Mocking react-router’s Redirect Component on a Form Submission 05:57
88 Test Drive Assertions with Dates in React 03:46
89 Use Generated Data in Tests with tests-data-bot to Improve Test Maintainability 03:25
90 Test Drive Error State with React Testing Library 05:23
91 Write a Custom Render Function to Share Code between Tests and Simplify Tests 02:56
92 Test React Components that Use the react-router Router Provider with createMemoryHistory 03:59
93 Initialize the `history` Object with a Bad Entry to Test the react-router no-match Route 01:14
94 Create a Custom render Function to Simplify Tests of react-router Components 05:16
95 Test a Redux Connected React Component 03:01
96 Test a Redux Connected React Component with Initialized State 01:36
97 Create a Custom Render Function to Simplify Tests of Redux Components 04:02
98 Test a Custom React Hook with React’s Act Utility and a Test Component 03:17
99 Write a Setup Function to Reduce Duplication of Testing Custom React Hooks 03:27
100 Test a Custom React Hook with renderHook from React Hooks Testing Library 01:28
101 Test Updates to Your Custom React Hook with rerender from React Hooks Testing Library 01:00
102 Test React Portals with within from React Testing Library 04:17
103 Test Unmounting a React Component with React Testing Library 04:39
104 Write React Application Integration Tests with React Testing Library 07:40
105 Improve Reliability of Integration Tests using find* Queries from React Testing Library 02:03
106 Improve Reliability of Integration Tests Using the User Event Module 01:51
107 What's changed in Install, Configure, and Script Cypress for JavaScript Web Applications 02:01
108 Intro to Install, Configure, and Script Cypress for JavaScript Web Applications 01:40
109 Install and Run Cypress 03:20
110 Write the First Cypress Test 04:58
111 Configure Cypress in cypress.json 02:43
112 Installing Cypress Testing Library 03:03
113 Script Cypress for Local Development and Continuous Integration 05:08
114 Debug a Test with Cypress 04:23
115 Test User Registration with Cypress 04:43
116 Cypress Driven Development 02:20
117 Simulate HTTP Errors in Cypress Tests 03:17
118 Test User Login with Cypress 01:28
119 Create a User with cy.request from Cypress 02:20
120 Keep Tests Isolated and Focused with Custom Cypress Commands 02:09
121 Use Custom Cypress Command for Reusable Assertions 01:38
122 Run Tests as an Authenticated User with Cypress 01:21
123 Use cy.request from Cypress to Authenticate as a New User 01:46
124 Use a Custom Cypress Command to Login as a User 00:40
125 Combine Custom Cypress Commands into a Single Custom Command 01:38
126 Install React DevTools with Cypress 03:09
127 Intro to Test Node.js Backends 04:24
128 Test Pure Functions Overview 01:29
129 Write Unit Tests for a Simple Pure Function 02:47
130 Improve Error Messages by Generating Test Titles 04:47
131 Use jest-in-case to Reduce Duplication and Improve Test Titles 04:07
132 Create a Casify Function to Generate Cases for jest-in-case 04:14
133 Test Node Middleware Overview 01:57
134 Write a Unit Test for Handling an UnauthorizedError 06:20
135 Write a Unit Test for Handling headersSent in an Error Middleware 02:04
136 Write a Unit Test for Status 500 Error Middleware Fallback 02:21
137 Improve Test Maintainability using the Test Object Factory Pattern 02:58
138 Use a Test Object Factory utils/generate 03:40
139 Test Node Controllers Overview 02:52
140 Write a Unit Test for a Controller by Mocking the Database 06:27
141 Simplify Assertions on Error Messages with toMatchInlineSnapshot 05:36
142 Unit Test Business Logic of a Controller’s Middleware 05:29
143 Test Controller 404 Edge Case where Resource is Not Found 03:10
144 Test Controller Unauthorized Case 03:39
145 Test getListItems for Getting Multiple Mock Objects 05:58
146 Test the Happy Path of a Creation Flow 06:09
147 Testing an Error Case for createListItem 03:35
148 Testing the Happy Path for updateListItem 04:50
149 Testing Resource Deletion 02:28
150 Test Authentication API Routes Overview 04:15
151 Start a Node Server and Fire a Request to an HTTP API Endpoint 04:13
152 Make Assertions on HTTP API Responses for Registration 01:37
153 Test the Login Endpoint for a Node Server 01:58
154 Test the User’s Resource Endpoint 01:58
155 Create a Pre-configured axios Client for the baseURL 01:48
156 Improve Error Messages with an axios Interceptor 06:56
157 Ensure a Unique Server Port 05:03
158 Use Snapshots to Assert on Server Error Responses 03:01
159 Interact Directly with the Database 01:39
160 Test all the Edge Cases 03:39
161 Test CRUD API Routes Overview 01:19
162 Write an Integration Test for a Resource Create Endpoint 03:50
163 Write an Integration Test for a Resource Read Endpoint 01:43
164 Integration Test a Resource Update Endpoint 01:42
165 Integration Test a Resource Delete Endpoint 04:01
166 Snapshot the Error Message with Dynamic Data 01:54
167 Practical testing with Wes Bos and Scott Tolinski 22:04
168 a11y with Marcy Sutton 34:23
169 Static Types with Jessica Kerr 28:42
170 Testing Practices with J.B. Rainsberger 33:27
171 Visual regression testing with Angie Jones 26:46
172 Snapshots and Reason with Jared Forsyth 35:02
173 Testing culture with Justin Searls 46:15
174 Ministry of testing with Rosie Sherry 27:42
175 Craftmanship with Kent Beck 32:56
176 Testing Levels with Mattias Johansson 38:32

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