Improve code coverage

Signed-off-by: Franck LECUYER <franck.lecuyer@rte-france.com>

src/main/java/org/gridsuite/modification/server/service/NetworkVariantsListener.java

@@ -71,7 +71,7 @@ public void onUpdate(Identifiable<?> identifiable, String attribute, String vari
     }
 
     @Override
-    public void onExtensionCreation(Extension<?> extension) {
+    public void onExtensionBeforeRemoval(Extension<?> extension) {
         // do nothing
     }
 
@@ -81,12 +81,12 @@ public void onExtensionAfterRemoval(Identifiable<?> identifiable, String extensi
     }
 
     @Override
-    public void onExtensionBeforeRemoval(Extension<?> extension) {
+    public void onExtensionUpdate(Extension<?> extendable, String attribute, String variantId, Object oldValue, Object newValue) {
         // do nothing
     }
 
     @Override
-    public void onExtensionUpdate(Extension<?> extendable, String attribute, String variantId, Object oldValue, Object newValue) {
+    public void onExtensionCreation(Extension<?> extension) {
         // do nothing
     }
 

src/test/java/org/gridsuite/modification/server/service/NetworkVariantsListenerTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024, RTE (http://www.rte-france.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+package org.gridsuite.modification.server.service;
+
+import org.gridsuite.modification.server.elasticsearch.EquipmentInfosService;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.data.elasticsearch.NoSuchIndexException;
+
+import java.util.UUID;
+
+
+/**
+ * @author Franck Lecuyer <franck.lecuyer at rte-france.com>
+ */
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
+class NetworkVariantsListenerTests {
+    private static final UUID NETWORK_UUID = UUID.randomUUID();
+    private static final String VARIANT_ID = "variant_1";
+
+    @Autowired
+    private EquipmentInfosService equipmentInfosService;
+
+    @AfterEach
+    void tearDown() {
+        try {
+            equipmentInfosService.deleteAll();
+        } catch (NoSuchIndexException ex) {
+            // no need to worry that much
+        }
+    }
+
+    @Test
+    void testVariantNotifications() {
+        NetworkVariantsListener listener = new NetworkVariantsListener(null, NETWORK_UUID, equipmentInfosService);
+
+        listener.onVariantRemoved(VARIANT_ID);
+        listener.onVariantCreated("variant_1", "variant_2");
+        listener.onVariantOverwritten("variant_2", "variant_3");
+        listener.onUpdate(null, null, null, null, null);
+        listener.onExtensionUpdate(null, null, null, null, null);
+        listener.onPropertyAdded(null, null, null);
+        listener.onPropertyReplaced(null, null, null, null);
+        listener.onPropertyRemoved(null, null, null);
+    }
+}