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The Complete Next.js Testing Course

8h 12m 48s
English
Paid

Master production-level testing in Next.js with this comprehensive course, bridging the gap to a senior developer level with ease.

Why Testing is Essential

Many developers deploy projects with fingers crossed. However, only a select few implement robust testing practices that catch critical bugs pre-production. This course is your gateway into this elite group of developers.

Discover why merely writing a few unit tests isn't enough, how to build a solid testing strategy, and the limitations of relying solely on coverage percentages like 80-90%. Testing is not just a task; it's a cohesive system.

Course Structure

The course follows a structured approach, divided into three core stages to enhance your learning experience:

Stage 1: Deep Understanding of Testing

Gain insights into establishing a test architecture, designing robust and scalable test systems, and fostering a fearless approach to refactoring.

Stage 2: Testing a Real Production Application

Work with a comprehensive application similar to StackOverflow, covering authentication, server-side logic, database interactions, API communications, AI integrations, and handling asynchronous processes, instead of simplistic examples.

Stage 3: Active Practical Assignments

Engage actively by writing tests for crucial scenarios, thereby reinforcing patterns used in a real production environment.

Tools and Technologies

Equip yourself with a cutting-edge testing stack suited for 2025 and beyond. The course covers:

  • Jest
  • React Testing Library
  • Playwright
  • Artillery
  • CI/CD using GitHub Actions and CircleCI

Prerequisites

This course is tailored for developers with a solid grasp of JavaScript and foundational experience with React and Next.js. Testing experience is not a prerequisite—you'll learn it comprehensively through practical, real-world scenarios.

Course Outcome

Upon completion, you'll have the confidence to test complex Next.js applications effectively, preemptively catching bugs and meeting the expectations of mid-to-senior-level developers.

About the Authors

Adrian Hajdin

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Adrian is a Software Engineer who specializes in education. Being experienced in an abundance of technologies he's helped thousands of people become professional developers. He's a proud founder of the JavaScript Mastery brand and the associated YouTube channel.

jsmastery.pro

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Master Modern Web Development With a Project Based Approach. Gain real-world experience and land that dev job you've always imagined.

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#1: 001 Welcome to the Course
All Course Lessons (82)
#Lesson TitleDurationAccess
1
001 Welcome to the Course Demo
02:20
2
002 Prerequisites
01:43
3
003 Introduction to Testing
01:46
4
004 Meet Adrian, Your Instructor
01:51
5
005 Access to a Private 24-7 Community
01:19
6
006 Environment Setup
02:54
7
007 Introduction to Types of Testing
03:01
8
008 Testing by Scope
00:39
9
009 Testing by Scope
02:03
10
010 Testing by Scope
01:20
11
011 Testing by Scope
02:00
12
012 Testing by Scope
02:10
13
013 Testing by Knowledge
00:25
14
014 Testing by Knowledge
02:11
15
015 Testing by Knowledge
02:06
16
016 Testing by Knowledge
01:18
17
017 Testing by Purpose
00:48
18
018 Testing by Purpose
02:39
19
019 Testing by Purpose
02:39
20
020 Testing by Execution
00:33
21
021 Testing by Execution
02:02
22
022 Testing by Execution
02:26
23
023 Introduction to Testing Strategies
01:58
24
024 The Testing Pyramid
04:37
25
025 The Ice Cream Cone Anti-Pattern
02:44
26
026 The Testing Trophy
03:30
27
027 The Honeycomb Strategy
04:37
28
028 The Testing Diamond
04:01
29
029 Choose The Right Testing Strategy
04:31
30
030 Building and Evolving Your Testing Strategy
03:59
31
031 Git & GitHub
07:57
32
032 IDE — Integrated Development Environment
02:56
33
033 Node.js
04:27
34
034 Docker
03:24
35
035 Introduction to Testing Tools
02:45
36
036 Unit Testing Tools
03:51
37
037 Frontend Testing Tools
04:15
38
038 API and Backend Testing Tools
12:02
39
039 End-to-End Testing Tools
04:55
40
040 Common Misunderstandings
03:47
41
041 Introduction to Unit Testing
01:42
42
042 Setting Up the Testing Environment
10:50
43
043 Testing the Input Field Component
14:48
44
044 Testing the Image Upload Component
18:02
45
045 Testing the Text Area Component
15:21
46
046 Testing Social Fields Component
10:17
47
047 Testing the Profile Preview Component
06:14
48
048 Introduction to Integration Testing
03:26
49
049 Next.js Testing Setup with Vitest
03:28
50
050 MSW Setup: Mocking APIs for Integration Tests
13:09
51
051 Fetching Pokémon Test-Driven Server Action
09:46
52
052 Pokémon Type Fetching Test-Driven Server Action
11:51
53
053 Introduction to DevOverflow
06:34
54
054 Running DevOverflow Locally
18:05
55
055 Setup Testing Environment
09:40
56
056 Code Architecture
05:53
57
057 Your First Test in DevOverflow
08:44
58
058 Form Rendering
14:47
59
059 Form Validation
07:59
60
060 Form Submission
07:33
61
061 Scalable Mock Implementation
07:18
62
062 bmjldneh
03:52
63
063 Form Success
03:43
64
064 Question Form
01:55
65
065 Mock Editor
06:07
66
066 Question Form Rendering
09:29
67
067 Question Submission
21:07
68
068 Mock Next Auth
07:58
69
069 Answer Form for Authenticated Users
15:07
70
070 Answer Form Submission
12:06
71
071 Mock Question Card Components
10:57
72
072 Question Card
12:19
73
073 Question Card Responsiveness
04:51
74
074 Introduction
00:56
75
075 Preparing to Run Server Side Tests
02:39
76
076 Database Setup
08:17
77
077 Jest Integration Setup
11:30
78
078 Server Action Validation
09:45
79
079 Server Action Logic
09:13
80
080 Server Action Query
02:54
81
081 Introduction
01:14
82
082 AI Generation
10:53
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