BAEL-7574: added tests

spring-boot-modules/spring-boot-libraries-3/src/main/java/com/baeldung/springmodulith/application/events/orders/OrderCompletedEvent.java

@@ -2,5 +2,5 @@ package com.baeldung.springmodulith.application.events.orders;
 
 import java.time.Instant;
 
-public record OrderCompletedEvent(String orderId, String customerId, Instant time) {
+public record OrderCompletedEvent(String orderId, String customerId, Instant timestamp) {
 }

spring-boot-modules/spring-boot-libraries-3/src/test/java/com/baeldung/springmodulith/application/events/ApplicationEventsUnitTest.java

@@ -14,8 +14,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 @SpringBootTest
 @ComponentScan(basePackages = "com.baeldung.springmodulith.application.events")
-public class ApplicationEventsTest {
-
+public class ApplicationEventsUnitTest {
 
 	@Autowired
 	OrderService orderService;

spring-boot-modules/spring-boot-libraries-3/src/test/java/com/baeldung/springmodulith/application/events/EventListenerUnitTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.springmodulith.application.events;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Instant;
+
+import org.assertj.core.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.context.ApplicationEventPublisher;
+import org.springframework.context.annotation.ComponentScan;
+
+import com.baeldung.springmodulith.application.events.orders.OrderCompletedEvent;
+import com.baeldung.springmodulith.application.events.rewards.LoyalCustomersRepository;
+
+@SpringBootTest
+@ComponentScan(basePackages = "com.baeldung.springmodulith.application.events")
+public class EventListenerUnitTest {
+
+	@Autowired
+	private LoyalCustomersRepository customers;
+
+	@Autowired
+	private ApplicationEventPublisher testEventPublisher;
+
+	@Test
+	void whenPublishingOrderCompletedEvent_thenRewardCustomerWithLoyaltyPoints() {
+		OrderCompletedEvent event = new OrderCompletedEvent("order-1", "customer-1", Instant.now());
+
+		testEventPublisher.publishEvent(event);
+
+		assertThat(customers.find("customer-1"))
+			.isPresent().get()
+			.hasFieldOrPropertyWithValue("customerId", "customer-1")
+			.hasFieldOrPropertyWithValue("points", 60);
+	}
+
+}

spring-boot-modules/spring-boot-libraries-3/src/test/java/com/baeldung/springmodulith/application/events/EventPublisherUnitTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.springmodulith.application.events;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.ComponentScan;
+
+import com.baeldung.springmodulith.application.events.orders.OrderService;
+
+@SpringBootTest
+@ComponentScan(basePackages = "com.baeldung.springmodulith.application.events")
+public class EventPublisherUnitTest {
+
+	@Autowired
+	OrderService orderService;
+
+	@Autowired
+	TestEventListener testEventListener;
+
+	@BeforeEach
+	void beforeEach() {
+		testEventListener.reset();
+	}
+
+	@Test
+	void whenPlacingOrder_thenPublishApplicationEvent() {
+		orderService.placeOrder("customer1", "product1", "product2");
+
+		assertThat(testEventListener.getEvents())
+			.hasSize(1).first()
+			.hasFieldOrPropertyWithValue("customerId", "customer1")
+			.hasFieldOrProperty("orderId")
+			.hasFieldOrProperty("timestamp");
+	}
+
+}

spring-boot-modules/spring-boot-libraries-3/src/test/java/com/baeldung/springmodulith/application/events/TestEventListener.java

@@ -0,0 +1,29 @@
+package com.baeldung.springmodulith.application.events;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+
+import com.baeldung.springmodulith.application.events.orders.OrderCompletedEvent;
+
+@Component
+class TestEventListener {
+
+    private final List<OrderCompletedEvent> events = new ArrayList<>();
+
+    @EventListener
+    void onEvent(OrderCompletedEvent event) {
+        events.add(event);
+    }
+
+    public List<OrderCompletedEvent> getEvents() {
+        return events;
+    }
+
+    public void reset() {
+        events.clear();
+    }
+}
+