What is unit testing in Java and how do I get started?

What is unit testing in Java and how do I get started?

Unit testing in Java is a software testing method where individual units of code are tested in isolation. You can get started by using frameworks like JUnit or TestNG.

Can you show me a simple example using JUnit?

Sure! Here's a basic example:

import org.junit.Test;
import static org.junit.Assert.*;

public class CalculatorTest {
    @Test
    public void testAdd() {
        Calculator calc = new Calculator();
        assertEquals(5, calc.add(2, 3));
    }
}

This tests a simple add method in a Calculator class.

What are some best practices for writing unit tests?

Some best practices include: writing tests that are independent, naming tests clearly, keeping tests fast, and covering edge cases.

How do I run my unit tests in an IDE?

In most IDEs like IntelliJ or Eclipse, you can right-click on your test class or method and select 'Run'. This will execute your tests and show the results.