Practical Test-Driven Development for Java Programmers

Learn the fundamentals of test-driven Java development. This hands-on course covers how to write tests for tricky scenarios, use mocking frameworks like Mockito, and more.

Introduction

• Welcome

1. What Is Test-Driven Development?

• What is test-driven development?
• What do you want to test?

2. Introducing JUnit

• The case study
• Set up instructions for IntelliJ users
• Setting up the project structure
• JUnit basics

3. Writing Your First Tests

• Examples and outcomes
• Getting to red
• Getting to green
• Why you always start with red
• Adding more tests
• Understanding the business logic
• Finally writing some code

4. Practicing the Basics

• Testing for exceptions
• Challenge 1
• Walkthrough 1
• Challenge 2
• Walkthrough 2 and challenge 3
• Walkthrough 3
• Getting to more complex requirements
• Using TDD to safely fix bugs
• Challenge 4 and walkthrough 4
• Finishing the business requirements

5. Refactoring

• Introducing refactoring
• Restructuring code

6. Best Practices

• Good and bad tests
• JUnit asserts

7. Stubs

• Testing code with dependencies
• Building an example
• Creating the stub

8. Mocking with Mockito

• Why mocks are useful
• Creating a mock
• Testing behaviour
• Mockito syntax options

9. Fakes and Tautologies

• Reviewing fakes and tautologies
• Challenge 5
• Walkthrough 5
• Using setUp and tearDown
• Tautologies
• How to avoid tautologies

10. Handling Legacy Code

• Loading up the final case study
• Understanding the project structure
• Understanding the business logic
• Adding Mockito
• Setting up the tests
• The need for spying
• Challenge 6
• Walkthrough 6, part 1
• Walkthrough 6, part 2