Guide: Second Law of Test-Driven Development (TDD)

The second law of TDD is a principle in test-driven development that states, 'You should not write more of a unit test than is sufficient to fail, or compilation failures are failures.'

This law is crucial because it enhances the cycle of writing just enough code and tests, assisting in quick detection and correction of errors.

Under this law, developers write a failing unit test before writing functional code. The written code will then make the test pass. Subsequently, any new code should fail this test.

This process ensures that every piece of code is properly tested, thus reducing the possibility of bugs or defects. It also allows for a streamlined and efficient approach to coding.

Exam Tips: Answering Questions on Second Law of TDD

Understanding the principle behind the Second Law of TDD is critical for successfully answering exam questions about it. Here are crucial tips:

• Understand the Basics: Thoroughly understand the principles and steps involved in TDD
• Practical Applications: Have a good understanding of how this law is applied in a real-world scenario
• Identify Relevant Scenarios: Be able to identify which scenarios warrant the use of the Second Law of TDD
• Interpretation Skills: You should be able to interpret different contexts and apply the law accordingly