project created

src/main/java/com/ap/BasicCalculator.java

@@ -0,0 +1,18 @@
+package com.ap;
+
+public class BasicCalculator implements Calculator {
+    @Override
+    public int add(int a, int b) {
+        return a + b;
+    }
+
+    @Override
+    public int subtract(int a, int b) {
+        return a - b;
+    }
+
+    @Override
+    public int multiply(int a, int b) {
+        return a * b;
+    }
+}

src/main/java/com/ap/Calculator.java

@@ -0,0 +1,7 @@
+package com.ap;
+
+public interface Calculator {
+    int add(int a, int b);
+    int subtract(int a, int b);
+    int multiply(int a, int b);
+}

src/main/java/com/ap/Main.java

@@ -0,0 +1,8 @@
+package com.ap;
+
+public class Main {
+    public static void main(String[] args) {
+        ReportGenerator generator = new ReportGenerator();
+        generator.generate(5, 3);
+    }
+}

src/main/java/com/ap/MathHelper.java

@@ -0,0 +1,15 @@
+package com.ap;
+
+public class MathHelper {
+    public static int multiply(int a, int b) {
+        return a * b;
+    }
+
+    public static int square(int x) {
+        return x * x;
+    }
+
+    public static int max(int a, int b) {
+        return a > b ? a : b;
+    }
+}

src/main/java/com/ap/ReportGenerator.java

@@ -0,0 +1,13 @@
+package com.ap;
+
+public class ReportGenerator {
+    public void generate(int x, int y) {
+        Calculator calc = new BasicCalculator();
+        int sum = calc.add(x, y);
+        int diff = calc.subtract(x, y);
+        int product = calc.multiply(x, y);
+        int max = MathHelper.max(x, y);
+        System.out.println("Sum: " + sum + ", Diff: " + diff +
+                ", Product: " + product + ", Max: " + max);
+    }
+}

src/test/java/CalculatorTest.java

@@ -0,0 +1,26 @@
+
+import com.ap.BasicCalculator;
+import com.ap.Calculator;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+
+public class CalculatorTest {
+    @Test
+    void testAdd() {
+        Calculator calc = new BasicCalculator();
+        assertEquals(5, calc.add(2, 3));
+    }
+
+    @Test
+    void testSubtract() {
+        Calculator calc = new BasicCalculator();
+        assertEquals(2, calc.subtract(5, 3));
+    }
+
+    @Test
+    void testMultiply() {
+        Calculator calc = new BasicCalculator();
+        assertEquals(6, calc.multiply(2, 3));
+    }
+}