fixed testing class

Author: Mohaned Atef

Monolithic-Ecommerce/src/test/java/com/iluwatar/monolithic/MonolithicAppTest.java

@@ -0,0 +1,105 @@
+package com.iluwatar.monolithic;
+
+import com.iluwatar.monolithic.controller.OrderCon;
+import com.iluwatar.monolithic.controller.ProductCon;
+import com.iluwatar.monolithic.controller.UserCon;
+import com.iluwatar.monolithic.model.Products;
+import com.iluwatar.monolithic.model.Orders;
+import com.iluwatar.monolithic.model.User;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Scanner;
+import static org.junit.jupiter.api.Assertions.*;
+
+
+import static org.mockito.Mockito.*;
+
+class MonolithicAppTest {
+
+  @Mock
+  private UserCon userService;
+
+  @Mock
+  private ProductCon productService;
+
+  @Mock
+  private OrderCon orderService;
+
+  private EcommerceApp ecommerceApp;
+
+  private ByteArrayOutputStream outputStream;
+
+  @BeforeEach
+  void setUp() {
+    MockitoAnnotations.openMocks(this);
+    ecommerceApp = new EcommerceApp(userService, productService, orderService);
+    outputStream = new ByteArrayOutputStream();
+    System.setOut(new PrintStream(outputStream, true, StandardCharsets.UTF_8));
+  }
+
+  @Test
+  void testRegisterUser() {
+    // Simulate user input for registering a user
+    String simulatedInput = "John Doe\n[email protected]\npassword123\n";
+    System.setIn(new ByteArrayInputStream(simulatedInput.getBytes(StandardCharsets.UTF_8)));
+
+    ecommerceApp.registerUser(new Scanner(System.in, StandardCharsets.UTF_8));
+
+    // Verify userService interaction
+    verify(userService, times(1)).registerUser(any(User.class));
+    assertTrue(outputStream.toString().contains("User registered successfully!"));
+  }
+
+  @Test
+  void testAddProduct() {
+    // Simulate user input for adding a product
+    String simulatedInput = "Laptop\nGaming Laptop\n1200.50\n10\n";
+    System.setIn(new ByteArrayInputStream(simulatedInput.getBytes(StandardCharsets.UTF_8)));
+
+    ecommerceApp.addProduct(new Scanner(System.in, StandardCharsets.UTF_8));
+
+    // Verify productService interaction
+    verify(productService, times(1)).addProduct(any(Products.class));
+    assertTrue(outputStream.toString().contains("Product added successfully!"));
+  }
+
+  @Test
+  void testPlaceOrderSuccess() {
+    // Simulate user input for placing an order
+    String simulatedInput = "1\n2\n3\n";
+    System.setIn(new ByteArrayInputStream(simulatedInput.getBytes(StandardCharsets.UTF_8)));
+
+    // Mocking placeOrder to return an order object
+    Orders mockOrder = new Orders(); // Create a mock or dummy Orders object
+    doReturn(mockOrder).when(orderService).placeOrder(anyLong(), anyLong(), anyInt());
+
+    ecommerceApp.placeOrder(new Scanner(System.in, StandardCharsets.UTF_8));
+
+    // Verify orderService interaction
+    verify(orderService, times(1)).placeOrder(anyLong(), anyLong(), anyInt());
+    assertTrue(outputStream.toString().contains("Order placed successfully!"));
+  }
+
+  @Test
+  void testPlaceOrderFailure() {
+    // Simulate user input for placing an order
+    String simulatedInput = "1\n2\n3\n";
+    System.setIn(new ByteArrayInputStream(simulatedInput.getBytes(StandardCharsets.UTF_8)));
+
+    doThrow(new RuntimeException("Product out of stock"))
+        .when(orderService).placeOrder(anyLong(), anyLong(), anyInt());
+
+    ecommerceApp.placeOrder(new Scanner(System.in, StandardCharsets.UTF_8));
+
+    // Verify orderService interaction
+    verify(orderService, times(1)).placeOrder(anyLong(), anyLong(), anyInt());
+    assertTrue(outputStream.toString().contains("Error placing order: Product out of stock"));
+  }
+}