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diff --git a/src/test/groovy/org/onap/cps/ncmp/dmi/notifications/cmsubscription/CmNotificationSubscriptionDmiOutEventToCloudEventMapperSpec.groovy b/src/test/groovy/org/onap/cps/ncmp/dmi/notifications/cmsubscription/CmNotificationSubscriptionDmiOutEventToCloudEventMapperSpec.groovy
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+++ b/src/test/groovy/org/onap/cps/ncmp/dmi/notifications/cmsubscription/CmNotificationSubscriptionDmiOutEventToCloudEventMapperSpec.groovy
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+/*
+ * ============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.dmi.notifications.cmsubscription
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.cloudevents.core.builder.CloudEventBuilder
+import org.onap.cps.ncmp.dmi.exception.CloudEventConstructionException
+import org.onap.cps.ncmp.events.cmnotificationsubscription_merge1_0_0.dmi_to_ncmp.CmNotificationSubscriptionDmiOutEvent
+import org.onap.cps.ncmp.events.cmnotificationsubscription_merge1_0_0.dmi_to_ncmp.Data
+import org.spockframework.spring.SpringBean
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.context.SpringBootTest
+import spock.lang.Specification
+
+@SpringBootTest(classes = [ObjectMapper])
+class CmNotificationSubscriptionDmiOutEventToCloudEventMapperSpec extends Specification {
+
+    @Autowired
+    def objectMapper = new ObjectMapper()
+
+    @SpringBean
+    CmNotificationSubscriptionDmiOutEventToCloudEventMapper objectUnderTest = new CmNotificationSubscriptionDmiOutEventToCloudEventMapper()
+
+    def 'Convert a Cm Subscription DMI Out Event to CloudEvent successfully.'() {
+        given: 'a Cm Subscription DMI Out Event and an event key'
+            def dmiName = 'test-ncmp-dmi'
+            def correlationId = 'subscription1#test-ncmp-dmi'
+            def cmSubscriptionDmiOutEventData = new Data(statusCode: "1", statusMessage: "accepted")
+            def cmSubscriptionDmiOutEvent =
+                    new CmNotificationSubscriptionDmiOutEvent().withData(cmSubscriptionDmiOutEventData)
+        when: 'a Cm Subscription DMI Out Event is converted'
+            def result = objectUnderTest.toCloudEvent(cmSubscriptionDmiOutEvent, "subscriptionCreatedStatus", dmiName, correlationId)
+        then: 'Cm Subscription DMI Out Event is converted as expected'
+            def expectedCloudEvent = CloudEventBuilder.v1().withId(UUID.randomUUID().toString()).withSource(URI.create('test-ncmp-dmi'))
+                    .withType("subscriptionCreated")
+                    .withDataSchema(URI.create("urn:cps:" + CmNotificationSubscriptionDmiOutEvent.class.getName() + ":1.0.0"))
+                    .withExtension("correlationid", correlationId)
+                    .withData(objectMapper.writeValueAsBytes(cmSubscriptionDmiOutEvent)).build()
+            assert expectedCloudEvent.data == result.data
+    }
+
+    def 'Map the Cloud Event to data of the subscription event with null parameters causes an exception'() {
+        given: 'an empty subscription response event and event key'
+            def correlationId = 'subscription1#test-ncmp-dmi'
+            def cmSubscriptionDmiOutEvent = new CmNotificationSubscriptionDmiOutEvent()
+        when: 'the cm subscription dmi out Event map to data of cloud event'
+            objectUnderTest.toCloudEvent(cmSubscriptionDmiOutEvent, "subscriptionCreatedStatus", null , correlationId)
+        then: 'a run time exception is thrown'
+            thrown(CloudEventConstructionException)
+    }
+}