Guide to Test-Driven Development
What is Test-Driven Development (TDD)?
TDD is a software development process where developers first write the tests before writing the minimum amount of code needed to pass those tests. The test cases are based on the system's requirements and are intended to indicate what the code should do.
Why is TDD Important?
TDD helps in designing cleaner interfaces, breaking down tasks into smaller, manageable units and helps in maintaining high coverage, which boosts the quality of the software. It enables developers to refine their code and prevents over-engineering.
How does TDD work?
TDD works on a rapid, short-term feedback loop. Developers write a test that defines a desired function, run it (it fails because the function isn't implemented yet), write the code to make the test pass, then refactor the code for optimization.
Exam Tips: Answering Questions on Test-Driven Development
1. Understand the Basics: Be thorough with the basic principles, benefits, and process of TDD.
2. Practical Application: Demonstrate understanding not just theoretically but in practical application, including writing tests first, making them pass and refactoring.
3. Clarity: Make your answers clear and concise. Provide examples where relevant.
4. Understand Common Misconceptions: Be prepared to debunk common misconceptions about TDD.
5. Use Proper Terminology: Use the correct words and phrases associated with TDD in your answers.
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Test-Driven Development practice test
Test-Driven Development (TDD) is an iterative software development technique that involves writing tests before writing the actual code. The primary purpose of TDD is to clarify requirements, minimize errors, and ensure that all the functions perform as intended. The process follows a 'red-green-refactor' cycle: first, a failing test (red) is created, then the minimum required code is written to pass the test (green), and finally, the code is refactored and improved to meet quality standards. TDD promotes clean, modular, and maintainable code, while also reducing the time spent on debugging and fixing defects. Additionally, it helps in producing a robust suite of test cases that protect against unintentional side-effects and regression issues during future development.
Time: 5 minutes Questions: 5
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