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Thomas Peuß

Hirtengasse 8a

63843 Niedernberg

Germany

Email: office@peuss.de

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Properties of tests you need to know - Focused and Specific

In the world of software development, tests are essential. They ensure code quality, maintainability, and reliability. But not all tests are created equal. Some tests are vague, broad, and difficult to maintain, while others are precise, clear, and immensely helpful. The difference often boils down to two key properties: focus and specificity . In this blog post, we’ll explore why tests should be focused and specific, and how these attributes can elevate your testing strategy. What Does It Mean for a Test to Be "Focused"? A focused test is one that addresses a single responsibility or behavior in isolation. It avoids trying to cover multiple features or scenarios in one go. Focused tests are typically shorter and easier to understand, making them more robust and less prone to errors. Each unit test should focus on testing a specific aspect of the unit's behavior. Avoid testing multiple behaviors in a single test case to keep them focused ...

Properties of tests you need to know - Maintainability and Readability

Writing unit tests is an essential part of software development, but their value diminishes if they are difficult to understand or maintain. Maintainable and readable tests ensure that your test suite evolves with the codebase and remains a reliable safety net over time. By following coding standards and best practices, you can write clear, concise, and well-structured test code that benefits both current and future developers. Why Maintainability and Readability Matter Ease of Understanding: Tests should clearly convey their purpose to anyone reading them, including new team members. Simplified Maintenance: Well-structured tests are easier to update when the codebase changes, reducing the risk of introducing errors. Faster Debugging: Readable tests help identify the source of failures quickly, saving time during development. Increased Confidence: Developers are more likely to trust and use a test suite that is easy to navigate and understand. Best Practices for Writing Maintainabl...

Properties of tests you need to know - Repeatable and Deterministic

In software development, tests are most effective when they are reliable and consistent. A core principle of good testing is that tests should produce the same results consistently when executed multiple times with the same inputs. Non-deterministic tests—tests whose outcomes vary across runs—undermine confidence in the testing process and can lead to wasted time debugging issues unrelated to the actual code being tested. This is why tests must be repeatable and deterministic . What Are Repeatable and Deterministic Tests? Repeatable Tests: Tests are repeatable if they yield the same results every time they are run, given the same inputs and system state. Deterministic Tests: Tests are deterministic if their outcomes depend solely on the code being tested and its inputs, rather than external factors like time, random numbers, or system configuration. Why Repeatability and Determinism Matter Build Confidence: Reliable tests provide consistent feedback, helping developers trust the re...

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