The answer
A unit test is an automated test that checks if a specific, isolated function (a unit) behaves exactly as expected given specific inputs.
The Power of Modular Programming with Functions
What is a unit test?
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A function is a named, self-contained block of code designed to perform a specific task, which can be reused multiple times throughout a program.
DRY stands for 'Don't Repeat Yourself'. It is a coding principle emphasizing that logic should be written once in a function and reused, rather than copied.
It breaks complex systems into smaller, manageable, and testable pieces. This makes the code easier to read, debug, and collaborate on.
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