/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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.
   */
  package org.apache.commons.configuration2.tree;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test class for NodeAddData.
   */
  public class TestNodeAddData {
      /** Constant for the name of the new node. */
      private static final String TEST_NODENAME = "testNewNode";
  
      /** Constant for the name of a path node. */
      private static final String PATH_NODE_NAME = "PATHNODE";
  
      /** A default parent node. */
      private static ImmutableNode parentNode;
  
      @BeforeAll
      public static void setUpBeforeClass() throws Exception {
          parentNode = new ImmutableNode.Builder().name("testParent").create();
      }
  
      /**
       * Tests whether a defensive copy of the collection with path nodes is created.
       */
      @Test
      public void testInitPathNodesDefensiveCopy() {
          final List<String> pathNodes = new ArrayList<>();
          pathNodes.add(PATH_NODE_NAME);
          final NodeAddData<ImmutableNode> data = new NodeAddData<>(parentNode, TEST_NODENAME, false, pathNodes);
          pathNodes.add("anotherNode");
          assertEquals(Arrays.asList(PATH_NODE_NAME), data.getPathNodes());
      }
  
      /**
       * Tests that the collection with path nodes cannot be modified if data is available.
       */
      @Test
      public void testPathNodesDefinedModify() {
          final NodeAddData<ImmutableNode> data = new NodeAddData<>(parentNode, TEST_NODENAME, false, Collections.singleton(PATH_NODE_NAME));
          final List<String> pathNodes = data.getPathNodes();
          assertThrows(UnsupportedOperationException.class, () -> pathNodes.add("anotherNode"));
      }
  
      /**
       * Tests whether the constructor can handle a null collection of path nodes.
       */
      @Test
      public void testPathNodesNull() {
          final NodeAddData<ImmutableNode> data = new NodeAddData<>(parentNode, TEST_NODENAME, false, null);
          assertTrue(data.getPathNodes().isEmpty());
      }
  
      /**
       * Tests whether the collection with path nodes cannot be modified if no data is available.
       */
      @Test
      public void testPathNodesNullModify() {
          final NodeAddData<ImmutableNode> data = new NodeAddData<>(parentNode, TEST_NODENAME, false, null);
          final List<String> pathNodes = data.getPathNodes();
          assertThrows(UnsupportedOperationException.class, () -> pathNodes.add("test"));
      }
  }