Good candidates for unit tests
Identifying the optimal candidates for unit testing is pivotal in establishing a robust testing strategy. Unit tests excel when applied to parts of the code base that are well-suited to isolation and fine-grained verification. Here are some key examples and recommendations:
Classes and functions with clear boundaries and well-defined responsibilities are prime candidates for unit testing. These components should ideally embody the Single Responsibility Principle, handling a specific aspect of the application’s functionality. Testing these isolated units allows for precise verification of their behavior, ensuring that they perform their intended tasks correctly under various conditions.
Pure functions, which depend solely on their input parameters and produce no side effects, are excellent targets for unit tests. Their deterministic nature – where a given input always results in the same output – makes them straightforward to...
