What is unit testing and why is it important?

What is unit testing and why is it important?

Unit testing is a software testing method where individual components are tested in isolation. It's important because it helps identify bugs early, ensures code quality, and simplifies integration.

How do I write a unit test for a function?

To write a unit test, you typically use a testing framework like JUnit for Java or pytest for Python. You define test cases that check the function's output against expected results.

What are some best practices for unit testing?

Some best practices include writing tests for all new features, keeping tests independent, and using descriptive names for test cases to clarify their purpose.

Can you give me an example of a unit test?

Sure! Here's a simple example in Python using pytest:

def add(a, b):
    return a + b

def test_add():
    assert add(2, 3) == 5
    assert add(-1, 1) == 0

This tests the add function with different inputs.