/*
    * Grapht, an open source dependency injector.
    * Copyright 2014-2015 various contributors (see CONTRIBUTORS.txt)
    * Copyright 2010-2014 Regents of the University of Minnesota
    *
    * This program is free software; you can redistribute it and/or modify
    * it under the terms of the GNU Lesser General Public License as
    * published by the Free Software Foundation; either version 2.1 of the
    * License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
   * details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc., 51
   * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   */
  package org.grouplens.grapht.util;
  
  import org.apache.commons.lang3.SerializationUtils;
  import org.junit.Test;
  
  import java.io.IOException;
  import java.lang.reflect.Array;
  import java.util.List;
  
  import static org.hamcrest.Matchers.equalTo;
  import static org.junit.Assert.assertThat;
  
  @SuppressWarnings("rawtypes")
  public class ClassProxyTest {
      @Test
      public void testBasicProxy() throws ClassNotFoundException {
          ClassProxy proxy = ClassProxy.of(String.class);
          assertThat(proxy.getClassName(), equalTo("java.lang.String"));
          assertThat(proxy.resolve(), equalTo((Class) String.class));
      }
  
      @Test
      public void testPrimitiveProxy() throws ClassNotFoundException {
          ClassProxy proxy = ClassProxy.of(int.class);
          assertThat(proxy.getClassName(), equalTo("int"));
          assertThat(proxy.resolve(), equalTo((Class) int.class));
      }
  
      @Test
      public void testArrayProxy() throws ClassNotFoundException {
          ClassProxy proxy = ClassProxy.of(String[].class);
          assertThat(proxy.getClassName(), equalTo("[Ljava.lang.String;"));
          assertThat(proxy.resolve(),
                     equalTo((Class) Array.newInstance(String.class, 0).getClass()));
      }
  
      /**
       * Serialize and deserialize a class proxy.
       * @param cls The class to serialize
       * @return A class proxy that is the result of serializing a proxy for {@code cls} and
       * deserializing it.
       */
      private ClassProxy roundTrip(Class<?> cls) throws IOException, ClassNotFoundException {
          ClassProxy proxy = ClassProxy.of(cls);
          return SerializationUtils.clone(proxy);
      }
  
      @Test
      public void testSerializeString() throws ClassNotFoundException, IOException {
          ClassProxy proxy = roundTrip(String.class);
          assertThat(proxy.resolve(),
                     equalTo((Class) String.class));
      }
  
      @Test
      public void testSerializePrimitive() throws ClassNotFoundException, IOException {
          ClassProxy proxy = roundTrip(double.class);
          assertThat(proxy.resolve(),
                     equalTo((Class) double.class));
      }
  
      @Test
      public void testSerializeArray() throws ClassNotFoundException, IOException {
          ClassProxy proxy = roundTrip(String[][].class);
          assertThat(proxy.resolve(),
                     equalTo((Class) String[][].class));
      }
  
      @Test
      public void testSerializePrimitiveArray() throws ClassNotFoundException, IOException {
          ClassProxy proxy = roundTrip(double[][].class);
          assertThat(proxy.resolve(),
                     equalTo((Class) double[][].class));
      }
  
      @Test
      public void testEquals() {
          ClassProxy proxy = ClassProxy.of(String.class);
          assertThat(proxy.equals(null), equalTo(false));
          assertThat(proxy.equals(proxy), equalTo(true));
         ClassProxy equal = ClassProxy.of(String.class);
         ClassProxy unequal = ClassProxy.of(List.class);
         assertThat(proxy.equals(equal), equalTo(true));
         assertThat(proxy.equals(unequal), equalTo(false));
 
         ClassProxy serialized = SerializationUtils.clone(proxy);
         assertThat(proxy.equals(serialized), equalTo(true));
 
         // and test the hash code
         assertThat(equal.hashCode(), equalTo(proxy.hashCode()));
     }
 }