What ChaptGPT says about it...
Test Driven Development in the context of Test Driven Development
Test Driven Development
Test Driven Development (TDD) is a software development practice where tests are written before the actual code implementation. The process typically follows these steps:
Write a Test: Developers start by writing a test that defines a function or improvements of a function, which should be very succinct.
Run Tests: Run all the tests, including the new one. At this point, the newly written test is expected to fail.
Write Code: Write the minimal amount of code needed to pass the test. Developers should not write more code than needed for the test to pass.
Run Tests Again: Run the test suite again. If any test fails, additional code is written to make it pass. The process is repeated until all tests pass.
Refactor Code: As the codebase grows, refactor the code to improve its structure without altering its behavior. Ensure that all tests still pass after refactoring.
The core idea behind TDD is to write clean code that is easy to maintain, by ensuring that the codebase is reliably tested and that new code does not introduce bugs. TDD also promotes a better understanding of requirements and design, as tests serve as executable specifications for the software features.
Benefits of Test Driven Development:
- Reduced Bugs: TDD helps in catching and fixing bugs early in the development cycle.
- Improved Design: TDD encourages developers to design code that is modular and loosely coupled.
- Faster Feedback: Instant feedback from failed tests allows developers to make corrections immediately.
- Confidence in Changes: Developers can make changes confidently, knowing that existing functionality won't break if the tests still pass.
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by Stephan Hagemann