Added some test for the provider.

Signed-off-by: Dennis Labordus <[email protected]>

Author: Dennis Labordus

service/src/main/java/org/lfenergy/compas/scl/auto/alignment/service/SclAutoAlignmentDiagramLabelProvider.java

@@ -46,7 +46,7 @@ public List<NodeLabel> getNodeLabels(Node node, Direction direction) {
 
     @Override
     public List<NodeDecorator> getNodeDecorators(Node node, Direction direction) {
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 
     @Override

service/src/test/java/org/lfenergy/compas/scl/auto/alignment/service/SclAutoAlignmentDiagramLabelProviderTest.java

@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: 2022 Alliander N.V.
+//
+// SPDX-License-Identifier: Apache-2.0
+package org.lfenergy.compas.scl.auto.alignment.service;
+
+import com.powsybl.sld.model.graphs.SubstationGraph;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SclAutoAlignmentDiagramLabelProviderTest {
+    private SclAutoAlignmentDiagramLabelProvider provider;
+
+    @BeforeEach
+    void setup() {
+        provider = new SclAutoAlignmentDiagramLabelProvider(SubstationGraph.create("Dummy"));
+    }
+
+    @Test
+    void getNodeDecorators_whenCalled_ThenAlwaysReturnEmptyList() {
+        var result = provider.getNodeDecorators(null, null);
+
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    void getTooltip_whenCalled_ThenAlwaysReturnNull() {
+        var result = provider.getTooltip(null);
+
+        assertNull(result);
+    }
+
+    @Test
+    void getElectricalNodesInfos_whenCalled_ThenAlwaysReturnEmptyList() {
+        var result = provider.getElectricalNodesInfos(null);
+
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    void getBusInfo_whenCalled_ThenAlwaysReturnEmptyOptional() {
+        var result = provider.getBusInfo(null);
+
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    void getBusInfoSides_whenCalled_ThenAlwaysReturnEmptyMap() {
+        var result = provider.getBusInfoSides(null);
+
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+}