How should the test functions be named in unittest?

In the unittest framework, test functions are required to start with "test_" as this convention is used by the framework to recognize which methods are intended to be test cases. When a test runner executes a test suite, it automatically discovers and runs methods that follow this naming convention, allowing for efficient identification and execution of tests. This approach streamlines the process of writing and organizing tests, ensuring that all relevant test cases are included without the need for additional configuration or specification.

While it's possible to title functions in various ways, adhering to this convention ensures the smooth integration of the tests within the unittest framework and facilitates better readability and maintainability of the test code. The other options present alternative naming conventions or components that are not standard in the unittest framework.