If we wish to check whether each function defined in a program is working correctly or not, which testing should we cany out?

The correct answer is Unit testing.

Key Points

• Unit testing is a type of software testing where individual units or components of a program are tested.
• The purpose of unit testing is to validate that each unit of the software code performs as expected.
• In the context of the question, checking whether each function defined in a program is working correctly falls under unit testing.
• Units in this context are the smallest testable parts of a program, such as functions, methods, or procedures.
• Unit testing is typically automated but can also be done manually by software developers.

Additional Information

• Unit testing is usually performed during the development phase of the software lifecycle.
• It helps in identifying bugs early in the development process, saving time and costs in the long run.
• Popular frameworks for unit testing include JUnit for Java, NUnit for .NET, and Pytest for Python.
• Unit tests are often written by the developers themselves, ensuring that the code they write works as intended.
• Well-written unit tests act as documentation for the code, making it easier to understand and maintain.