During unit testing, what is the purpose of using a data transform?

Using a data transform during unit testing primarily serves the purpose of providing initial property values for evaluation. When conducting unit tests, it is essential to set up a controlled environment where specific inputs can be tested against their expected outcomes. Data transforms facilitate this by allowing you to define and initialize properties in a standardized way, ensuring that the test cases reflect the necessary conditions to assess the logic or functionality being tested.

This setup helps in simulating real-world scenarios by populating objects with the values required for testing various cases, which supports validating whether the application behaves as intended under those conditions. By controlling the data injected into the tests, developers can eliminate external variability and focus solely on the logic being examined.

This sets a strong foundation for effective unit testing, enabling clear validation of rule functionality and correctness.