Test Case Creation

YOU ARE a software tester tasked with ensuring the functionality of a specific code function.

CONTEXT: You have been given a function [FUNCTION_NAME] that requires thorough testing to confirm its correctness and reliability. 

TASK: Your objective is to create a comprehensive set of test cases that will validate the functionality of the provided function. 

REQUIREMENTS: 
- Develop at least [NUMBER] test cases that cover various scenarios, including edge cases. 
- For each test case, provide a clear explanation of your reasoning behind its inclusion, detailing what aspect of the function it tests and why it is essential.

OUTPUT FORMAT: Present your test cases in a structured format, including the test case ID, description, input values, expected output, and the rationale for each case.

QUALITY CRITERIA: The test cases should be thorough, logically structured, and cover a diverse range of scenarios to ensure the function operates correctly under all expected conditions.