public class Calculator {
public class CalculatorTest {
package com.example;
public double divide(double a, double b) { if (b == 0) { throw new ArithmeticException("Cannot divide by zero"); } return a / b; } } Modify App.java to use the Calculator class:
// src/main/java/com/example/App.java
public static void main(String[] args) { Calculator calculator = new Calculator(); System.out.println("Addition: " + calculator.add(10, 5)); System.out.println("Subtraction: " + calculator.subtract(10, 5)); System.out.println("Multiplication: " + calculator.multiply(10, 5)); System.out.println("Division: " + calculator.divide(10, 5)); } } 4.1 Write Unit Tests Create a test class CalculatorTest.java in src/test/java/com/example :
// src/main/java/com/example/Calculator.java maven minx work
import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertThrows;