/*
    * 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.Method;
  import java.util.Collections;
  import java.util.List;
  
  import static org.hamcrest.Matchers.equalTo;
  import static org.junit.Assert.assertThat;
  
  public class MethodProxyTest {
      private static class TestClass {
          String foo(String name) { return "Hello, " + name; }
          public int bar() { return -1; }
          public void wombat(List<String> foo, String... args) {
              Collections.addAll(foo, args);
          }
      }
  
      @Test
      public void testBasicMethod() throws NoSuchMethodException, ClassNotFoundException {
          Method f = TestClass.class.getDeclaredMethod("foo", String.class);
          MethodProxy proxy = MethodProxy.of(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      @Test
      public void testSerializeMethod() throws NoSuchMethodException, ClassNotFoundException, IOException {
          Method f = TestClass.class.getDeclaredMethod("foo", String.class);
          MethodProxy proxy = roundTrip(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      @Test
      public void testSerializeNullaryMethod() throws NoSuchMethodException, ClassNotFoundException, IOException {
          Method f = TestClass.class.getDeclaredMethod("bar");
          MethodProxy proxy = roundTrip(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      @Test
      public void testSerializeVariadicMethod() throws NoSuchMethodException, IOException, ClassNotFoundException {
          Method f = TestClass.class.getDeclaredMethod("wombat", List.class, String[].class);
          MethodProxy proxy = roundTrip(f);
          assertThat(proxy.resolve(), equalTo(f));
      }
  
      /**
       * Serialize and deserialize a method proxy.
       * @param fld The method to serialize
       * @return A method proxy that is the result of serializing a proxy for {@code fld} and
       * deserializing it.
       */
      private MethodProxy roundTrip(Method fld) throws IOException, ClassNotFoundException {
          MethodProxy proxy = MethodProxy.of(fld);
          return SerializationUtils.clone(proxy);
      }
  }