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diff --git a/src/test/java/org/onap/pnfsimulator/event/EventDataServiceTest.java b/src/test/java/org/onap/pnfsimulator/event/EventDataServiceTest.java
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+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.pnfsimulator.event;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+import org.hamcrest.collection.IsIterableContainingInOrder;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+
+public class EventDataServiceTest {
+
+    @Mock
+    private EventDataRepository repositoryMock;
+
+    @InjectMocks
+    private EventDataService service;
+
+    private static EventData sampleEventData(String id, String template,
+                                             String patched, String input, String keywords) {
+        return EventData.builder()
+                .id(id)
+                .template(template)
+                .patched(patched)
+                .input(input)
+                .keywords(keywords)
+                .build();
+    }
+
+    @BeforeEach
+    void resetMocks() {
+        initMocks(this);
+    }
+
+    @Test
+    void persistEventDataJsonObjectTest() {
+        JsonParser parser = new JsonParser();
+        JsonObject template = parser.parse("{ \"bla1\": \"bla2\"}").getAsJsonObject();
+        JsonObject patched = parser.parse("{ \"bla3\": \"bla4\"}").getAsJsonObject();
+        JsonObject input = parser.parse("{ \"bla5\": \"bla6\"}").getAsJsonObject();
+        JsonObject keywords = parser.parse("{ \"bla7\": \"bla8\"}").getAsJsonObject();
+        ArgumentCaptor<EventData> argumentCaptor = ArgumentCaptor.forClass(EventData.class);
+
+        service.persistEventData(template, patched, input, keywords);
+
+        verify(repositoryMock).save(argumentCaptor.capture());
+        EventData captured = argumentCaptor.getValue();
+
+        assertEquals(captured.getTemplate(), template.toString());
+        assertEquals(captured.getPatched(), patched.toString());
+        assertEquals(captured.getInput(), input.toString());
+        assertEquals(captured.getKeywords(), keywords.toString());
+    }
+
+    @Test
+    void getAllEventsTest() {
+
+        List<EventData> eventDataList = new ArrayList<>();
+        EventData ed1 = sampleEventData("id1", "t1", "p1", "i1", "k1");
+        EventData ed2 = sampleEventData("id2", "t2", "p2", "i2", "k2");
+        eventDataList.add(ed1);
+        eventDataList.add(ed2);
+
+        when(repositoryMock.findAll()).thenReturn(eventDataList);
+        List<EventData> actualList = service.getAllEvents();
+
+        assertEquals(eventDataList.size(), actualList.size());
+        assertThat(actualList, IsIterableContainingInOrder.contains(ed1, ed2));
+    }
+
+    @Test
+    void findByIdPresentTest() {
+        String id = "some_object";
+        EventData eventData = sampleEventData(id, "template", "patched", "input", "keywords");
+        Optional<EventData> optional = Optional.of(eventData);
+
+        when(repositoryMock.findById(id)).thenReturn(optional);
+
+        Optional<EventData> actualOptional = service.getById(id);
+        assertTrue(actualOptional.isPresent());
+        EventData actualObject = actualOptional.get();
+        assertEquals(eventData.getId(), actualObject.getId());
+        assertEquals(eventData.getTemplate(), actualObject.getTemplate());
+        assertEquals(eventData.getPatched(), actualObject.getPatched());
+        assertEquals(eventData.getInput(), actualObject.getInput());
+        assertEquals(eventData.getKeywords(), actualObject.getKeywords());
+
+    }
+
+    @Test
+    void findByIdNotPresentTest() {
+        String id = "some_object";
+        Optional<EventData> optional = Optional.empty();
+
+        when(repositoryMock.findById(id)).thenReturn(optional);
+
+        Optional<EventData> actualOptional = service.getById(id);
+        assertTrue(!actualOptional.isPresent());
+    }
+}