Create tests for EventPublisher error scenarios

  - Added tests for error scenarios
  - Added tests for expected scenarios

Issue-ID: CPS-1978
Signed-off-by: JvD_Ericsson <jeff.van.dam@est.tech>
Change-Id: I6ba19ac456098f074e634f7cf70fdc141491c635

2 files changed, 124 insertions, 4 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/EventsPublisher.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/EventsPublisher.java
index dddad63923..03d440e640 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/EventsPublisher.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/events/EventsPublisher.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * Copyright (C) 2022-2023 Nordix Foundation
+ * Copyright (C) 2022-2024 Nordix Foundation
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -118,11 +118,11 @@ public class EventsPublisher<T> {
     private void handleLegacyEventCallback(final String topicName,
             final CompletableFuture<SendResult<String, T>> eventFuture) {
         eventFuture.whenComplete((result, e) -> {
-            if (e != null) {
-                log.error("Unable to publish event to topic : {} due to {}", topicName, e.getMessage());
-            } else {
+            if (e == null) {
                 log.debug("Successfully published event to topic : {} , Event : {}", result.getRecordMetadata().topic(),
                         result.getProducerRecord().value());
+            } else {
+                log.error("Unable to publish event to topic : {} due to {}", topicName, e.getMessage());
             }
         });
     }
diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/EventsPublisherSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/EventsPublisherSpec.groovy
new file mode 100644
index 0000000000..9176a79f6f
--- /dev/null
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/EventsPublisherSpec.groovy
@@ -0,0 +1,120 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2024 Nordix Foundation
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.events
+
+import ch.qos.logback.classic.Level
+import ch.qos.logback.classic.Logger
+import ch.qos.logback.classic.spi.ILoggingEvent
+import ch.qos.logback.core.read.ListAppender
+import io.cloudevents.CloudEvent
+import java.util.concurrent.CompletableFuture
+import org.apache.kafka.clients.producer.ProducerRecord
+import org.apache.kafka.clients.producer.RecordMetadata
+import org.apache.kafka.common.TopicPartition
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.BeforeEach
+import org.slf4j.LoggerFactory
+import org.springframework.kafka.core.KafkaTemplate
+import org.springframework.kafka.support.SendResult
+import spock.lang.Specification
+
+class EventsPublisherSpec extends Specification {
+
+    def legacyKafkaTemplateStub = Stub(KafkaTemplate)
+    def mockCloudEventKafkaTemplate = Mock(KafkaTemplate)
+    def logger = Spy(ListAppender<ILoggingEvent>)
+
+    @BeforeEach
+    void setup() {
+        def setupLogger = ((Logger) LoggerFactory.getLogger(EventsPublisher.class))
+        setupLogger.setLevel(Level.DEBUG)
+        setupLogger.addAppender(logger)
+        logger.start()
+    }
+
+    @AfterEach
+    void teardown() {
+        ((Logger) LoggerFactory.getLogger(EventsPublisher.class)).detachAndStopAllAppenders()
+    }
+
+    def objectUnderTest = new EventsPublisher(legacyKafkaTemplateStub, mockCloudEventKafkaTemplate)
+
+    def 'Publish Cloud Event'() {
+        given: 'a successfully published event'
+            def eventFuture = CompletableFuture.completedFuture(
+                new SendResult(
+                    new ProducerRecord('some-topic', 'some-value'),
+                    new RecordMetadata(new TopicPartition('some-topic', 0), 0, 0, 0, 0, 0)
+                )
+            )
+            def someCloudEvent = Mock(CloudEvent)
+            1 * mockCloudEventKafkaTemplate.send('some-topic', 'some-event-key', someCloudEvent) >> eventFuture
+        when: 'publishing the cloud event'
+            objectUnderTest.publishCloudEvent('some-topic', 'some-event-key', someCloudEvent)
+        then: 'the correct debug message is logged'
+            def lastLoggingEvent = logger.list[0]
+            assert lastLoggingEvent.level == Level.DEBUG
+            assert lastLoggingEvent.formattedMessage.contains('Successfully published event')
+    }
+
+    def 'Publish Cloud Event with Exception'() {
+        given: 'a failed event'
+            def eventFutureWithFailure = new CompletableFuture<SendResult<String, String>>()
+            eventFutureWithFailure.completeExceptionally(new RuntimeException('some exception'))
+            def someCloudEvent = Mock(CloudEvent)
+            1 * mockCloudEventKafkaTemplate.send('some-topic', 'some-event-key', someCloudEvent) >> eventFutureWithFailure
+        when: 'publishing the cloud event'
+            objectUnderTest.publishCloudEvent('some-topic', 'some-event-key', someCloudEvent)
+        then: 'the correct error message is logged'
+            def lastLoggingEvent = logger.list[0]
+            assert lastLoggingEvent.level == Level.ERROR
+            assert lastLoggingEvent.formattedMessage.contains('Unable to publish event')
+    }
+
+    def 'Handle Legacy Event Callback'() {
+        given: 'an event is successfully published'
+            def eventFuture = CompletableFuture.completedFuture(
+                new SendResult(
+                    new ProducerRecord('some-topic', 'some-value'),
+                    new RecordMetadata(new TopicPartition('some-topic', 0), 0, 0, 0, 0, 0)
+                )
+            )
+        when: 'handling legacy event callback'
+            objectUnderTest.handleLegacyEventCallback('some-topic', eventFuture)
+        then: 'the correct debug message is logged'
+            def lastLoggingEvent = logger.list[0]
+            assert lastLoggingEvent.level == Level.DEBUG
+            assert lastLoggingEvent.formattedMessage.contains('Successfully published event')
+    }
+
+    def 'Handle Legacy Event Callback with Exception'() {
+        given: 'a failure to publish an event'
+            def eventFutureWithFailure = new CompletableFuture<SendResult<String, String>>()
+            eventFutureWithFailure.completeExceptionally(new RuntimeException('some exception'))
+        when: 'handling legacy event callback'
+            objectUnderTest.handleLegacyEventCallback('some-topic', eventFutureWithFailure)
+        then: 'the correct error message is logged'
+            def lastLoggingEvent = logger.list[0]
+            assert lastLoggingEvent.level == Level.ERROR
+            assert lastLoggingEvent.formattedMessage.contains('Unable to publish event')
+    }
+
+}
\ No newline at end of file