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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

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Second Law of TDD practice test

The Second Law of TDD states that you cannot write more of a unit test than is sufficient to fail. This means you should write just enough of a test to demonstrate failure. It encourages only writing the code necessary to address the failing test, ensuring that the codebase remains concise and uncluttered. By writing tests in small increments, it reduces the chances of introducing bugs.

Time: 5 minutes   Questions: 5

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  • 4442 Superior-grade PMI Agile Certified Practitioner practice questions.
  • Accelerated Mastery: Deep dive into critical topics to fast-track your mastery.
  • Unlock Effortless PMI-ACP preparation: 5 full exams.
  • 100% Satisfaction Guaranteed: Full refund with no questions if unsatisfied.
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  • Risk-Free Decision: Start with a 7-day free trial - get premium features at no cost!