calculator/ ├── pom.xml └── src ├── main │ └── java │ └── com │ └── example │ └── App.java └── test └── java └── com └── example └── AppTest.java Let's add a feature to our calculator application that allows it to perform addition, subtraction, multiplication, and division. 3.1 Create a Calculator Class Create a new Java class Calculator.java in src/main/java/com/example :
public double add(double a, double b) { return a + b; }
import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertThrows;