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In this course, you will learn :
- How to use tests to drive the writing of your code, a key component of agile programming.
- A range of practical topics that can help Java developers get up and running with test-driven development (TDD)
- How to deal with real-world challenges you may encounter when carrying out TDD
- How to write your first test and determine what makes a good or bad test.
- How to test code where there's a dependency on third-party resources
- How to create mocks and stubs with Mockito—a popular third-party library—and more
Syllabus:
- Introduction
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
