/*
    * 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;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNotSame;
  import static org.junit.jupiter.api.Assertions.assertNull;
  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.io.IOException;
  import java.io.Serializable;
  import java.util.Date;
  import java.util.TimeZone;
  
  import org.apache.commons.collections4.functors.ConstantFactory;
  import org.apache.commons.collections4.functors.ExceptionFactory;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests the org.apache.commons.collections.FactoryUtils class.
   */
  public class FactoryUtilsTest {
  
      public static class Mock1 {
          private final int iVal;
          public Mock1(final int val) {
              iVal = val;
          }
          public Mock1(final Mock1 mock) {
              iVal = mock.iVal;
          }
          @Override
          public boolean equals(final Object obj) {
              if (obj instanceof Mock1 && iVal == ((Mock1) obj).iVal) {
                  return true;
              }
              return false;
          }
          @Override
          public int hashCode() { // please Findbugs
              return super.hashCode();
          }
      }
  
      public static class Mock2 implements Serializable {
          /**
           * Generated serial version ID.
           */
          private static final long serialVersionUID = 4899282162482588924L;
          private final Object iVal;
          public Mock2(final Object val) {
              iVal = val;
          }
          @Override
          public boolean equals(final Object obj) {
              if (obj instanceof Mock2 && iVal == ((Mock2) obj).iVal) {
                  return true;
              }
              return false;
          }
          @Override
          public int hashCode() { // please Findbugs
              return super.hashCode();
          }
      }
  
      public static class Mock3 {
          private static int cCounter;
          private final int iVal;
          public Mock3() {
              iVal = cCounter++;
          }
          public int getValue() {
              return iVal;
          }
      }
  
      @Test
      public void testConstantFactoryConstant() {
          final Integer constant = Integer.valueOf(9);
          final Factory<Integer> factory = FactoryUtils.constantFactory(constant);
          assertNotNull(factory);
         final Integer created = factory.create();
         assertSame(constant, created);
     }
 
     @Test
     public void testConstantFactoryNull() {
         final Factory<Object> factory = FactoryUtils.constantFactory(null);
         assertNotNull(factory);
         final Object created = factory.create();
         assertNull(created);
     }
 
     @Test
     public void testExceptionFactory() {
         assertNotNull(FactoryUtils.exceptionFactory());
         assertSame(FactoryUtils.exceptionFactory(), FactoryUtils.exceptionFactory());
 
         assertThrows(FunctorException.class, () -> FactoryUtils.exceptionFactory().create());
     }
 
     @Test
     public void testInstantiateFactoryComplex() {
         TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
         // 2nd Jan 1970
         final Factory<Date> factory = FactoryUtils.instantiateFactory(Date.class,
             new Class[] {Integer.TYPE, Integer.TYPE, Integer.TYPE},
             new Object[] {Integer.valueOf(70), Integer.valueOf(0), Integer.valueOf(2)});
         assertNotNull(factory);
         final Date created = factory.create();
         // long time of 1 day (== 2nd Jan 1970)
         assertEquals(new Date(1000 * 60 * 60 * 24), created);
     }
 
     @Test
     public void testInstantiateFactoryMismatch() {
         assertThrows(IllegalArgumentException.class, () -> FactoryUtils.instantiateFactory(Date.class, null, new Object[] {null}));
     }
 
     @Test
     public void testInstantiateFactoryNoConstructor() {
         assertThrows(IllegalArgumentException.class, () -> FactoryUtils.instantiateFactory(Date.class, new Class[] {Long.class}, new Object[] {null}));
     }
 
     @Test
     public void testInstantiateFactoryNull() {
         assertThrows(NullPointerException.class, () -> FactoryUtils.instantiateFactory(null));
     }
 
     @Test
     public void testInstantiateFactorySimple() {
         final Factory<Mock3> factory = FactoryUtils.instantiateFactory(Mock3.class);
         assertNotNull(factory);
         Mock3 created = factory.create();
         assertEquals(0, created.getValue());
         created = factory.create();
         assertEquals(1, created.getValue());
     }
 
     @Test
     public void testNullFactory() {
         final Factory<Object> factory = FactoryUtils.nullFactory();
         assertNotNull(factory);
         final Object created = factory.create();
         assertNull(created);
     }
 
     @Test
     public void testPrototypeFactoryNull() {
         assertSame(ConstantFactory.NULL_INSTANCE, FactoryUtils.prototypeFactory(null));
     }
 
     @Test
     public void testPrototypeFactoryPublicBad() {
         final Object proto = new Object();
         assertThrows(IllegalArgumentException.class, () -> FactoryUtils.prototypeFactory(proto));
     }
 
     @Test
     public void testPrototypeFactoryPublicCloneMethod() throws Exception {
         final Date proto = new Date();
         final Factory<Date> factory = FactoryUtils.prototypeFactory(proto);
         assertNotNull(factory);
         final Date created = factory.create();
         assertNotSame(proto, created);
         assertEquals(proto, created);
     }
 
     @Test
     public void testPrototypeFactoryPublicCopyConstructor() throws Exception {
         final Mock1 proto = new Mock1(6);
         final Factory<Object> factory = FactoryUtils.<Object>prototypeFactory(proto);
         assertNotNull(factory);
         final Object created = factory.create();
         assertNotSame(proto, created);
         assertEquals(proto, created);
     }
 
     @Test
     public void testPrototypeFactoryPublicSerialization() throws Exception {
         final Integer proto = 9;
         final Factory<Integer> factory = FactoryUtils.prototypeFactory(proto);
         assertNotNull(factory);
         final Integer created = factory.create();
         assertNotSame(proto, created);
         assertEquals(proto, created);
     }
 
     @Test
     public void testPrototypeFactoryPublicSerializationError() {
         final Mock2 proto = new Mock2(new Object());
         final Factory<Object> factory = FactoryUtils.<Object>prototypeFactory(proto);
         assertNotNull(factory);
 
         final FunctorException thrown = assertThrows(FunctorException.class, () -> factory.create());
         assertTrue(thrown.getCause() instanceof IOException);
     }
 
     /**
      * Test that all Factory singletons hold singleton pattern in
      * serialization/deserialization process.
      */
     @Test
     public void testSingletonPatternInSerialization() {
         final Object[] singletons = {
             ExceptionFactory.INSTANCE,
         };
 
         for (final Object original : singletons) {
             TestUtils.assertSameAfterSerialization(
                     "Singleton pattern broken for " + original.getClass(),
                     original
             );
         }
     }
 
 }