/*
    * 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.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.util.Arrays;
  import java.util.Comparator;
  import java.util.Set;
  import java.util.SortedSet;
  import java.util.TreeSet;
  
  import org.apache.commons.collections4.Predicate;
  import org.apache.commons.collections4.functors.TruePredicate;
  import org.junit.jupiter.api.Test;
  
  /**
   * Extension of {@link AbstractSortedSetTest} for exercising the
   * {@link PredicatedSortedSet} implementation.
   */
  public class PredicatedSortedSetTest<E> extends AbstractSortedSetTest<E> {
  
      protected Predicate<E> truePredicate = TruePredicate.<E>truePredicate();
  
      protected Predicate<E> testPredicate =
          o -> o instanceof String && ((String) o).startsWith("A");
  
      @Override
      public String getCompatibilityVersion() {
          return "4";
      }
  
      @Override
      public SortedSet<E> makeFullCollection() {
          final TreeSet<E> set = new TreeSet<>(Arrays.asList(getFullElements()));
          return PredicatedSortedSet.predicatedSortedSet(set, truePredicate);
      }
  
      @Override
      public SortedSet<E> makeObject() {
          return PredicatedSortedSet.predicatedSortedSet(new TreeSet<>(), truePredicate);
      }
  
      protected PredicatedSortedSet<E> makeTestSet() {
          return PredicatedSortedSet.predicatedSortedSet(new TreeSet<>(), testPredicate);
      }
  
      @Test
      public void testComparator() {
          final SortedSet<E> set = makeTestSet();
          final Comparator<? super E> c = set.comparator();
          assertNull(c, "natural order, so comparator should be null");
      }
  
      @Test
      public void testGetSet() {
          final PredicatedSortedSet<E> set = makeTestSet();
          assertNotNull(set.decorated(), "returned set should not be null");
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testIllegalAdd() {
          final SortedSet<E> set = makeTestSet();
          final String testString = "B";
          assertThrows(IllegalArgumentException.class, () -> set.add((E) testString),
                  "Should fail string predicate.");
          assertFalse(set.contains(testString), "Collection shouldn't contain illegal element");
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testIllegalAddAll() {
          final SortedSet<E> set = makeTestSet();
          final Set<E> elements = new TreeSet<>();
          elements.add((E) "Aone");
          elements.add((E) "Atwo");
          elements.add((E) "Bthree");
          elements.add((E) "Afour");
          assertThrows(IllegalArgumentException.class, () -> set.addAll(elements),
                  "Should fail string predicate.");
          assertFalse(set.contains("Aone"), "Set shouldn't contain illegal element");
         assertFalse(set.contains("Atwo"), "Set shouldn't contain illegal element");
         assertFalse(set.contains("Bthree"), "Set shouldn't contain illegal element");
         assertFalse(set.contains("Afour"), "Set shouldn't contain illegal element");
     }
 
 //    public void testCreate() throws Exception {
 //        resetEmpty();
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/PredicatedSortedSet.emptyCollection.version4.obj");
 //        resetFull();
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/PredicatedSortedSet.fullCollection.version4.obj");
 //    }
 
 }