import org.junit.Test;
import static org.junit.Assert.*;
 
class SimpleTest {
 
    @Test
    public void testAddition() {
        int result = 2 + 2;
        assertEquals(4, result);
    }
 
    @Test
    public void testSubtraction() {
        int result = 5 - 3;
        assertEquals(2, result);
    }
 
    @Test
    public void testMultiplication() {
        int result = 5 * 4;
        assertEquals(20, result);
    }
 
    @Test
    public void testDivision() {
        double result = 10 / 2;
        assertEquals(5.0, result, 0.0001);
    }
 
    public static void main(String[] args) {
        SimpleTest simpleTest = new SimpleTest();
        simpleTest.runTests();
    }
 
    public void runTests() {
        try {
            testAddition();
            System.out.println("Addition test passed");
        } catch (AssertionError e) {
            System.out.println("Addition test failed: " + e.getMessage());
        }
 
        try {
            testSubtraction();
            System.out.println("Subtraction test passed");
        } catch (AssertionError e) {
            System.out.println("Subtraction test failed: " + e.getMessage());
        }
 
        try {
            testMultiplication();
            System.out.println("Multiplication test passed");
        } catch (AssertionError e) {
            System.out.println("Multiplication test failed: " + e.getMessage());
        }
 
        try {
            testDivision();
            System.out.println("Division test passed");
        } catch (AssertionError e) {
            System.out.println("Division test failed: " + e.getMessage());
        }
    }
}
 

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