eugenp · Maiklins · Oct 4, 2023 · Sep 21, 2023 · Sep 21, 2023 · Sep 23, 2023
diff --git a/...odules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/ExternalAlertService.java b/...odules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/ExternalAlertService.java
@@ -0,0 +1,6 @@
+package com.baeldung.spytest;
+
+public interface ExternalAlertService {
+    public boolean alert(Order order);
+
+}
diff --git a/...modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/NotificationService.java b/...modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/NotificationService.java
@@ -0,0 +1,18 @@
+package com.baeldung.spytest;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class NotificationService {
+
+    private ExternalAlertService externalAlertService;
+
+    public void notify(Order order) {
+        System.out.println(order);
+    }
+
+    public boolean raiseAlert(Order order) {
+        return externalAlertService.alert(order);
+    }
+
+}
diff --git a/spring-boot-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/Order.java b/spring-boot-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/Order.java
@@ -0,0 +1,49 @@
+package com.baeldung.spytest;
+
+import java.util.UUID;
+
+public class Order {
+
+    private UUID id;
+
+    private String name;
+
+    private OrderType orderType;
+
+    private double orderQuantity;
+
+    private String address;
+
+    public Order(UUID id, String name, double orderQuantity, String address) {
+        this.id = id;
+        this.name = name;
+        this.orderQuantity = orderQuantity;
+        this.address = address;
+    }
+
+    public enum OrderType {
+        INDIVIDUAL, BULK;
+    }
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getOrderQuantity() {
+        return orderQuantity;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+}
+
+
diff --git a/...oot-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/OrderRepository.java b/...oot-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/OrderRepository.java
@@ -0,0 +1,19 @@
+package com.baeldung.spytest;
+
+import java.util.HashMap;
+import java.util.UUID;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class OrderRepository {
+
+    public static final HashMap<UUID, Order> orders = new HashMap<>();
+
+    public Order save(Order order) {
+        UUID orderId = UUID.randomUUID();
+        order.setId(orderId);
+        orders.put(UUID.randomUUID(), order);
+        return order;
+    }
+}
diff --git a/...g-boot-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/OrderService.java b/...g-boot-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/OrderService.java
@@ -0,0 +1,25 @@
+package com.baeldung.spytest;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class OrderService {
+
+    public final OrderRepository orderRepository;
+
+    public final NotificationService notificationService;
+
+    public OrderService(OrderRepository orderRepository, NotificationService notificationService) {
+        this.orderRepository = orderRepository;
+        this.notificationService = notificationService;
+    }
+
+    public Order save(Order order) {
+        order = orderRepository.save(order);
+        notificationService.notify(order);
+        if (!notificationService.raiseAlert(order)) {
+            throw new RuntimeException("Alert not raised");
+        }
+        return order;
+    }
+}
diff --git a/...-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/SpyTestApplication.java b/...-modules/spring-boot-testing-2/src/main/java/com/baeldung/spytest/SpyTestApplication.java
@@ -0,0 +1,13 @@
+package com.baeldung.spytest;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpyTestApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpyTestApplication.class, args);
+    }
+
+}
diff --git a/...spring-boot-testing-2/src/test/java/com/baeldung/spytest/OrderServiceIntegrationTest.java b/...spring-boot-testing-2/src/test/java/com/baeldung/spytest/OrderServiceIntegrationTest.java
@@ -0,0 +1,35 @@
+package com.baeldung.spytest;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.verify;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.SpyBean;
+
+@SpringBootTest
+class OrderServiceIntegrationTest {
+
+    @Autowired
+    OrderRepository orderRepository;
+    @SpyBean
+    NotificationService notificationService;
+    @SpyBean
+    OrderService orderService;
+
+    @Test
+    void givenNotificationServiceIsUsingSpyBean_whenOrderServiceIsCalled_thenNotificationServiceSpyBeanShouldBeInvoked() {
+
+        Order orderInput = new Order(null, "Test", 1.0, "17 St Andrews Croft, Leeds ,LS17 7TP");
+        doReturn(true).when(notificationService)
+            .raiseAlert(any(Order.class));
+        Order order = orderService.save(orderInput);
+        Assertions.assertNotNull(order);
+        Assertions.assertNotNull(order.getId());
+        verify(notificationService).notify(any(Order.class));
+    }
+
+}
diff --git a/...odules/spring-boot-testing-2/src/test/java/com/baeldung/spytest/OrderServiceUnitTest.java b/...odules/spring-boot-testing-2/src/test/java/com/baeldung/spytest/OrderServiceUnitTest.java
@@ -0,0 +1,41 @@
+package com.baeldung.spytest;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.verify;
+
+import java.util.UUID;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Spy;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+class OrderServiceUnitTest {
+
+    @Spy
+    OrderRepository orderRepository;
+    @Spy
+    NotificationService notificationService;
+    @InjectMocks
+    OrderService orderService;
+
+    @Test
+    void givenNotificationServiceIsUsingSpy_whenOrderServiceIsCalled_thenNotificationServiceSpyShouldBeInvoked() {
+
+        UUID orderId = UUID.randomUUID();
+        Order orderInput = new Order(orderId, "Test", 1.0, "17 St Andrews Croft, Leeds ,LS17 7TP");
+        doReturn(orderInput).when(orderRepository)
+            .save(any());
+        doReturn(true).when(notificationService)
+            .raiseAlert(any(Order.class));
+        Order order = orderService.save(orderInput);
+        Assertions.assertNotNull(order);
+        Assertions.assertEquals(orderId, order.getId());
+        verify(notificationService).notify(any(Order.class));
+    }
+
+}