Unit Testing with JUnit

Unit Testing with JUnit — a practical guide to Java JUnit with clear examples you can reuse in real projects.

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Short description

Tests document behavior and catch regressions. Keep them fast and focused.

JUnit 5 test

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

class MathTest {
    @Test
    void addsNumbers() {
        assertEquals(5, 2 + 3);
    }
}