/*
    * 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.collections4.set;
  
  import static org.junit.jupiter.api.Assertions.assertSame;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.commons.collections4.Unmodifiable;
  import org.junit.jupiter.api.Test;
  
  /**
   * Extension of {@link AbstractSetTest} for exercising the
   * {@link UnmodifiableSet} implementation.
   */
  public class UnmodifiableSetTest<E> extends AbstractSetTest<E> {
  
      public UnmodifiableSetTest() {
          super(UnmodifiableSetTest.class.getSimpleName());
      }
  
      @Override
      public String getCompatibilityVersion() {
          return "4";
      }
  
      @Override
      protected int getIterationBehaviour() {
          return UNORDERED;
      }
  
      @Override
      public boolean isAddSupported() {
          return false;
      }
  
      @Override
      public boolean isRemoveSupported() {
          return false;
      }
  
      @Override
      public Set<E> makeFullCollection() {
          final HashSet<E> set = new HashSet<>(Arrays.asList(getFullElements()));
          return UnmodifiableSet.unmodifiableSet(set);
      }
  
      @Override
      public Set<E> makeObject() {
          return UnmodifiableSet.unmodifiableSet(new HashSet<>());
      }
  
      @Test
      public void testDecorateFactory() {
          final Set<E> set = makeFullCollection();
          assertSame(set, UnmodifiableSet.unmodifiableSet(set));
  
          assertThrows(NullPointerException.class, () -> UnmodifiableSet.unmodifiableSet(null));
      }
  
      @Test
      public void testUnmodifiable() {
          assertTrue(makeObject() instanceof Unmodifiable);
          assertTrue(makeFullCollection() instanceof Unmodifiable);
      }
  
  //    public void testCreate() throws Exception {
  //        resetEmpty();
  //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/UnmodifiableSet.emptyCollection.version4.obj");
  //        resetFull();
  //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/UnmodifiableSet.fullCollection.version4.obj");
  //    }
  
  }