What are your thoughts on writing tests?

I believe writing tests is an essential practice in professional development. Tests help:

• Ensure stability and correctness of code when making changes.
• Quickly identify regressions.
• Document the behavior of components.

I prefer to write unit tests for isolated logic verification, as well as integration tests to check component interactions.

Example in Java using JUnit:

@Test
public void testCalculateSum() {
    Calculator calc = new Calculator();
    int result = calc.sum(2, 3);
    assertEquals(5, result);
}

I also consider it important to keep tests up to date and integrate them into the CI/CD pipeline.