/*
    * 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.functors;
  
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  import org.apache.commons.collections4.Predicate;
  import org.junit.jupiter.api.Test;
  
  public class EqualPredicateTest extends AbstractPredicateTest {
      public static class EqualsTestObject {
          private final boolean b;
  
          public EqualsTestObject(final boolean b) {
              this.b = b;
          }
  
          @Override
          public boolean equals(final Object obj) {
              return b;
          }
  
          @Override
          public int hashCode() {
              return Boolean.hashCode(b);
          }
      }
  
      private static final EqualsTestObject FALSE_OBJECT = new EqualsTestObject(false);
  
      private static final EqualsTestObject TRUE_OBJECT = new EqualsTestObject(true);
  
      @Override
      protected Predicate<Object> generatePredicate() {
          return EqualPredicate.equalPredicate(null);
      }
  
      @Test
      public void testNullArgumentEqualsNullPredicate() throws Exception {
          assertSame(NullPredicate.nullPredicate(), EqualPredicate.equalPredicate(null));
      }
  
      @Test
      public void testObjectFactoryUsesEqualsForTest() throws Exception {
          final Predicate<EqualsTestObject> predicate = EqualPredicate.equalPredicate(FALSE_OBJECT);
          assertPredicateFalse(predicate, null);
          assertPredicateFalse(predicate, TRUE_OBJECT); // different object
          assertPredicateTrue(predicate, FALSE_OBJECT); // the same object
          assertPredicateFalse(predicate, new EqualsTestObject(false)); // different object but always returns false from equals()
          assertPredicateTrue(EqualPredicate.equalPredicate(TRUE_OBJECT), TRUE_OBJECT);
      }
  
      @SuppressWarnings("boxing")
      @Test
      public void testPredicateTypeCanBeSuperClassOfObject() throws Exception {
          final Predicate<Number> predicate = EqualPredicate.equalPredicate((Number) 4);
          assertPredicateTrue(predicate, 4);
      }
  }