The Complete Next.js Testing Course
Course description
Master production-level testing in Next.js with just one course — and bridge the key gap between yourself and a senior developer level.
Most developers deploy projects "hoping for the best." Only a select few write truly reliable tests that catch real bugs before going to production. This course is designed to help you join their ranks.
You will learn why the approach of "writing a couple of unit tests and calling it a day" doesn't work, how to build a comprehensive testing strategy, and why 80-90% coverage doesn't guarantee application safety. Testing is not a point, it's a system.
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The course is structured around three key stages:
- Deep understanding of testing — you will learn about how test architecture is set up, how to design robust, scalable test systems, and not be afraid of refactoring.
- Testing a real production application — you will work not with "toy" examples, but with a full-fledged analog of StackOverflow: authentication, server actions, database, API, AI integrations, and asynchronous processes.
- Active practical assignments — you will independently write tests for key scenarios, reinforcing real production patterns.
In the process, you will master the modern testing stack for 2025 and beyond: Jest, React Testing Library, Playwright, Artillery, as well as CI/CD through GitHub Actions and CircleCI.
The course is designed for developers with confident knowledge of JavaScript and basic experience with React and Next.js. Experience in testing is not required — you will learn everything in practice, step by step, on real production scenarios.
Outcome: after the course, you will confidently test complex Next.js applications, catch bugs before production, and meet the requirements of mid and senior-level developers.
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All Course Lessons (82)
| # | Lesson Title | Duration | Access |
|---|---|---|---|
| 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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