/*
    * 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.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.commons.collections4.Transformer;
  import org.apache.commons.collections4.collection.TransformedCollectionTest;
  import org.junit.jupiter.api.Test;
  
  /**
   * Extension of {@link AbstractSetTest} for exercising the {@link TransformedSet}
   * implementation.
   */
  public class TransformedSetTest<E> extends AbstractSetTest<E> {
  
      @Override
      public String getCompatibilityVersion() {
          return "4";
      }
  
      @Override
      protected int getIterationBehaviour() {
          return UNORDERED;
      }
  
      @Override
      public Set<E> makeConfirmedCollection() {
          return new HashSet<>();
      }
  
      @Override
      public Set<E> makeConfirmedFullCollection() {
          return new HashSet<>(Arrays.asList(getFullElements()));
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public Set<E> makeFullCollection() {
          final Set<E> list = new HashSet<>(Arrays.asList(getFullElements()));
          return TransformedSet.transformingSet(list,
                  (Transformer<E, E>) TransformedCollectionTest.NOOP_TRANSFORMER);
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public Set<E> makeObject() {
          return TransformedSet.transformingSet(new HashSet<>(),
                  (Transformer<E, E>) TransformedCollectionTest.NOOP_TRANSFORMER);
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testTransformedSet() {
          final Set<E> set = TransformedSet.transformingSet(new HashSet<>(),
                  (Transformer<E, E>) TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
          assertEquals(0, set.size());
          final E[] els = (E[]) new Object[] { "1", "3", "5", "7", "2", "4", "6" };
          for (int i = 0; i < els.length; i++) {
              set.add(els[i]);
              assertEquals(i + 1, set.size());
              assertTrue(set.contains(Integer.valueOf((String) els[i])));
              assertFalse(set.contains(els[i]));
          }
  
          assertFalse(set.remove(els[0]));
          assertTrue(set.remove(Integer.valueOf((String) els[0])));
  
      }
  
      @Test
      public void testTransformedSet_decorateTransform() {
          final Set<Object> originalSet = new HashSet<>();
          final Object[] els = {"1", "3", "5", "7", "2", "4", "6"};
          Collections.addAll(originalSet, els);
          final Set<?> set = TransformedSet.transformedSet(originalSet, TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
          assertEquals(els.length, set.size());
          for (final Object el : els) {
             assertTrue(set.contains(Integer.valueOf((String) el)));
             assertFalse(set.contains(el));
         }
 
         assertFalse(set.remove(els[0]));
         assertTrue(set.remove(Integer.valueOf((String) els[0])));
     }
 
 //    public void testCreate() throws Exception {
 //        resetEmpty();
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/TransformedSet.emptyCollection.version4.obj");
 //        resetFull();
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/TransformedSet.fullCollection.version4.obj");
 //    }
 
 }