Mocking Explained: Testing with unittest.mock in Python (2026)
Learn how to master mocking in Python using the standard library `unittest.mock` module! 🐍
In this video, we break down the concept of mocking for beginners. We explain why it's essential for writing fast, isolated, and reliable unit tests. You'll learn the difference between `Mock` and `MagicMock`, how to use the `@patch` decorator, and how to verify your code's behavior using assertions.
Whether you are a beginner or looking to refresh your testing skills, this guide covers the core concepts you need to know. 🚀
*Topics Covered:*
🔹 What is Mocking?
🔹 The Mock and MagicMock classes
🔹 Controlling return values and side effects
🔹 Using @patch correctly
🔹 Common mistakes to avoid
#Python #Programming #UnitTesting #Mocking #SoftwareDevelopment #Python2026 #CodingTutorial
Chapters:
00:00 - Mocking Explained
00:15 - What is Mocking?
00:34 - Why Do We Mock?
00:54 - Introducing unittest.mock
01:09 - The Mock Class
01:25 - MagicMock vs Mock
01:43 - Controlling Behavior: Return Values
01:59 - Controlling Behavior: Side Effects
02:16 - Replacing Real Objects: @patch
02:32 - Verifying Calls
02:45 - Common Pitfalls
03:02 - Summary
03:20 - Outro
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