/*
    * 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.bag;
  
  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 org.apache.commons.collections4.Bag;
  import org.apache.commons.collections4.Transformer;
  import org.apache.commons.collections4.collection.TransformedCollectionTest;
  import org.junit.jupiter.api.Test;
  
  /**
   * Extension of {@link AbstractBagTest} for exercising the {@link TransformedBag}
   * implementation.
   */
  public class TransformedBagTest<T> extends AbstractBagTest<T> {
  
      @Override
      public String getCompatibilityVersion() {
          return "4";
      }
  
      @Override
      protected int getIterationBehaviour() {
          return UNORDERED;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public Bag<T> makeObject() {
          return TransformedBag.transformingBag(new HashBag<>(),
                  (Transformer<T, T>) TransformedCollectionTest.NOOP_TRANSFORMER);
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testTransformedBag() {
          //T had better be Object!
          final Bag<T> bag = TransformedBag.transformingBag(new HashBag<>(),
                  (Transformer<T, T>) TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
          assertTrue(bag.isEmpty());
          final Object[] els = {"1", "3", "5", "7", "2", "4", "6"};
          for (int i = 0; i < els.length; i++) {
              bag.add((T) els[i]);
              assertEquals(i + 1, bag.size());
              assertTrue(bag.contains(Integer.valueOf((String) els[i])));
              assertFalse(bag.contains(els[i]));
          }
  
          assertFalse(bag.remove(els[0]));
          assertTrue(bag.remove(Integer.valueOf((String) els[0])));
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testTransformedBag_decorateTransform() {
          final Bag<T> originalBag = new HashBag<>();
          final Object[] els = {"1", "3", "5", "7", "2", "4", "6"};
          for (final Object el : els) {
              originalBag.add((T) el);
          }
          final Bag<T> bag = TransformedBag.transformedBag(originalBag,
                  (Transformer<T, T>) TransformedCollectionTest.STRING_TO_INTEGER_TRANSFORMER);
          assertEquals(els.length, bag.size());
          for (final Object el : els) {
              assertTrue(bag.contains(Integer.valueOf((String) el)));
              assertFalse(bag.contains(el));
          }
  
          assertFalse(bag.remove(els[0]));
          assertTrue(bag.remove(Integer.valueOf((String) els[0])));
      }
  
  //    public void testCreate() throws Exception {
  //        Bag<T> bag = makeObject();
  //        writeExternalFormToDisk((java.io.Serializable) bag, "src/test/resources/data/test/TransformedBag.emptyCollection.version4.obj");
  //        bag = makeFullCollection();
  //        writeExternalFormToDisk((java.io.Serializable) bag, "src/test/resources/data/test/TransformedBag.fullCollection.version4.obj");
  //    }
  
  }