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diff --git a/src/test/java/org/onap/pnfsimulator/template/TemplateServiceTest.java b/src/test/java/org/onap/pnfsimulator/template/TemplateServiceTest.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * Simulator
+ * ================================================================================
+ * Copyright (C) 2019 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.template;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import org.assertj.core.util.Lists;
+import org.bson.Document;
+import org.junit.Assert;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.onap.pnfsimulator.template.search.viewmodel.FlatTemplateContent;
+import org.onap.pnfsimulator.template.search.TemplateSearchHelper;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.query.Query;
+
+import java.time.Instant;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyObject;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+class TemplateServiceTest {
+    private static final Gson GSON = new Gson();
+    private static final Template SAMPLE_TEMPLATE = new Template("sample name", new Document(), Instant.now().getNano());
+    private static final List<Template> SAMPLE_TEMPLATE_LIST = Collections.singletonList(SAMPLE_TEMPLATE);
+
+    @Mock
+    private TemplateRepository templateRepositoryMock;
+
+    @Mock
+    private MongoTemplate mongoTemplate;
+
+    @InjectMocks
+    private TemplateService service;
+
+    @BeforeEach
+    void setUp() {
+        initMocks(this);
+        TemplateSearchHelper searchHelper = new TemplateSearchHelper(mongoTemplate);
+        service = new TemplateService(templateRepositoryMock, searchHelper);
+    }
+
+    @Test
+    void testShouldReturnAllTemplates() {
+        when(templateRepositoryMock.findAll()).thenReturn(SAMPLE_TEMPLATE_LIST);
+
+        List<Template> actual = service.getAll();
+        assertThat(actual).containsExactly(SAMPLE_TEMPLATE_LIST.get(0));
+    }
+
+
+    @Test
+    void testShouldGetTemplateBySpecifiedName() {
+        when(templateRepositoryMock.findById("sample name")).thenReturn(Optional.of(SAMPLE_TEMPLATE));
+
+        Optional<Template> actualTemplate = service.get("sample name");
+        assertThat(actualTemplate).isPresent();
+        assertThat(actualTemplate.get()).isEqualTo(SAMPLE_TEMPLATE);
+    }
+
+    @Test
+    void testShouldSaveTemplate() {
+        service.persist(SAMPLE_TEMPLATE);
+
+        verify(templateRepositoryMock, times(1)).save(SAMPLE_TEMPLATE);
+    }
+
+    @Test
+    void testShouldDeleteTemplateByName() {
+        service.delete("sample name");
+
+        verify(templateRepositoryMock, times(1)).deleteById("sample name");
+    }
+
+
+    @Test
+    void testShouldReturnTemplatesAccordingToGivenSearchCriteria() {
+        doReturn(Lists.emptyList()).when(mongoTemplate).find(any(Query.class), anyObject(), any(String.class));
+
+        List<String> idsByContentCriteria = service.getIdsByContentCriteria(GSON.fromJson("{\"domain\": \"notification.json\"}", JsonObject.class));
+
+        assertThat(idsByContentCriteria).isEmpty();
+    }
+
+    @Test
+    void shouldReturnNamesForGivenComposedSearchCriteria() {
+        JsonObject composedCriteriaObject = GSON.fromJson("{\"eventName\": \"pnfRegistration_Nokia_5gDu\", \"sequence\": 1}", JsonObject.class);
+        List<FlatTemplateContent> arr = Lists.newArrayList(new FlatTemplateContent("sampleId", null));
+
+        doReturn(arr).when(mongoTemplate).find(any(Query.class), anyObject(), any(String.class));
+
+        List<String> idsByContentCriteria = service.getIdsByContentCriteria(composedCriteriaObject);
+        assertThat(idsByContentCriteria).containsOnly("sampleId");
+    }
+
+    @Test
+    void shouldReturnFalseWhenOverwritingWithoutForce() {
+        String id = "someTemplate";
+        Template template = new Template(id, new Document(), Instant.now().getNano());
+        when(templateRepositoryMock.existsById(id)).thenReturn(true);
+        boolean actual = service.tryPersistOrOverwrite(template, false);
+        Assert.assertFalse(actual);
+    }
+
+    @Test
+    void shouldReturnTrueWhenOverwritingWithForce() {
+        String id = "someTemplate";
+        Template template = new Template(id, new Document(), Instant.now().getNano());
+        when(templateRepositoryMock.existsById(id)).thenReturn(true);
+        boolean actual = service.tryPersistOrOverwrite(template, true);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    void shouldReturnTrueWhenSavingNonExistingTemplate() {
+        String id = "someTemplate";
+        Template template = new Template(id, new Document(), Instant.now().getNano());
+        when(templateRepositoryMock.existsById(id)).thenReturn(false);
+        boolean actual = service.tryPersistOrOverwrite(template, false);
+        Assert.assertTrue(actual);
+    }
+
+}