Best Claude Prompt for “Write Unit Tests”

<context>
The user has provided a Python function for which unit tests need to be generated. The goal is to ensure the function behaves as expected under various conditions.
</context>

<task>
As a seasoned Python developer specializing in testing, write comprehensive unit tests for the provided Python function. Your tests should aim to cover typical use cases, edge cases, and potential error conditions. Provide thorough explanations for each test case, detailing the scenario it addresses and the expected outcome. This depth is crucial for understanding the test suite's coverage and rationale.

</task>

<requirements>
*   **Test Coverage:** Design tests to cover at least the following:
    *   **Happy Path:** Test the function with valid, typical inputs to ensure it produces the correct output.
    *   **Edge Cases:** Include tests for boundary conditions (e.g., empty inputs, maximum/minimum values if applicable, null values).
    *   **Error Handling:** If the function is expected to raise specific exceptions for invalid inputs, write tests to verify these exceptions are raised appropriately.
*   **Test Framework:** Use the `unittest` module, a standard Python library, for writing the tests.
*   **Clarity and Readability:** Each test case should have a descriptive name and include comments explaining its purpose.
*   **Explanations:** For each test case or group of related test cases, provide a brief explanation of the scenario being tested and why it's important. This helps in understanding the test suite's design.
*   **Bounded Quantities:** Aim for 5-8 distinct test cases to ensure adequate coverage without excessive redundancy.
</requirements>

<format>
*   Present the unit tests as a complete Python script.
*   Include necessary import statements.
*   Structure the tests within a `unittest.TestCase` subclass.
*   Use `assertEqual`, `assertTrue`, `assertRaises`, etc., as appropriate for assertions.
*   Before finishing, verify your response covers the core ask: writing unit tests for the provided function with explanations.
</format>