Can you name popular libraries used for automated code testing?

Popular libraries for automated testing in Java:

• JUnit — standard framework for unit testing.
• TestNG — extended framework with support for parameterization and parallel execution.
• Mockito — library for creating mock objects and simulating dependency behavior.
• AssertJ — library with a convenient and readable API for assertions.
• Selenium — for automating web interface testing.

Example of a simple test with JUnit 5:

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

class CalculatorTest {
    @Test
    void addition() {
        assertEquals(4, 2 + 2);
    }
}