/*
    * 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.*;
  import java.lang.reflect.Field;
  
  import static org.hamcrest.Matchers.equalTo;
  import static org.junit.Assert.assertThat;
  
  public class FieldProxyTest {
      private static class TestClass {
          String foo;
          int bar;
      }
  
      @Test
      public void testBasicField() throws NoSuchFieldException, ClassNotFoundException {
          Field f = TestClass.class.getDeclaredField("foo");
          FieldProxy proxy = FieldProxy.of(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      @Test
      public void testSerializeField() throws NoSuchFieldException, ClassNotFoundException, IOException {
          Field f = TestClass.class.getDeclaredField("foo");
          FieldProxy proxy = roundTrip(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      @Test
      public void testSerializePrimitiveField() throws NoSuchFieldException, ClassNotFoundException, IOException {
          Field f = TestClass.class.getDeclaredField("bar");
          FieldProxy proxy = roundTrip(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      /**
       * Serialize and deserialize a field proxy.
       * @param fld The field to serialize
       * @return A field proxy that is the result of serializing a proxy for {@code fld} and
       * deserializing it.
       */
      private FieldProxy roundTrip(Field fld) throws IOException, ClassNotFoundException {
          FieldProxy proxy = FieldProxy.of(fld);
          return SerializationUtils.clone(proxy);
      }
  }