content: /*
   *  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.causeway.core.metamodel.commons;
  
  import java.util.Arrays;
  import java.util.List;
  
  import org.junit.jupiter.api.Test;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.CoreMatchers.not;
  import static org.hamcrest.CoreMatchers.nullValue;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  class ListUtilsTest_mutableCopy {
  
      @Test
      public void mutableCopyOfList_whenNotNull() throws Exception {
          List<Integer> input = Arrays.asList(Integer.valueOf(0), Integer.MAX_VALUE, Integer.MIN_VALUE);
  
          final List<Integer> list = ListExtensions.mutableCopy(input);
  
          assertThat(list.size(), is(3));
          assertThat(list.get(0), is(Integer.valueOf(0)));
          assertThat(list.get(1), is(Integer.MAX_VALUE));
          assertThat(list.get(2), is(Integer.MIN_VALUE));
  
          // is mutable
          list.add(Integer.valueOf(-1));
      }
  
      @Test
      public void mutableCopyOfList_whenNull() throws Exception {
          List<Integer> input = null;
  
          final List<Integer> list = ListExtensions.mutableCopy(input);
  
          assertThat(list, is(not(nullValue())));
          assertThat(list.size(), is(0));
  
          // is mutable
          list.add(Integer.valueOf(-1));
      }
  
      @Test
      public void mutableCopyOfArray_whenNotNull() throws Exception {
          Integer[] input = {Integer.valueOf(0), Integer.MAX_VALUE, Integer.MIN_VALUE};
  
          final List<Integer> list = ListExtensions.mutableCopy(input);
  
          assertThat(list.size(), is(3));
          assertThat(list.get(0), is(Integer.valueOf(0)));
          assertThat(list.get(1), is(Integer.MAX_VALUE));
          assertThat(list.get(2), is(Integer.MIN_VALUE));
  
          // is mutable
          list.add(Integer.valueOf(-1));
      }
  
      @Test
      public void mutableCopyOfArray_whenNull() throws Exception {
          Integer[] input = null;
  
          final List<Integer> list = ListExtensions.mutableCopy(input);
  
          assertThat(list, is(not(nullValue())));
          assertThat(list.size(), is(0));
  
          // is mutable
          list.add(Integer.valueOf(-1));
      }
  
  }
  