/*
    * 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.proxy2;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  
  import java.io.Serializable;
  import java.util.Arrays;
  import java.util.Properties;
  
  import org.apache.commons.proxy2.util.AbstractTestCase;
  import org.apache.commons.proxy2.util.DuplicateEcho;
  import org.apache.commons.proxy2.util.Echo;
  import org.apache.commons.proxy2.util.EchoImpl;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  public class ProxyUtilsTest extends AbstractTestCase
  {
      //**********************************************************************************************************************
      // Fields
      //**********************************************************************************************************************
  
      private Properties prevProperties;
  
      //**********************************************************************************************************************
      // Other Methods
      //**********************************************************************************************************************
  
      @Before
      public void setUp() throws Exception
      {
          prevProperties = System.getProperties();
          System.setProperties(new Properties());
      }
  
      @After
      public void tearDown() throws Exception
      {
          System.setProperties(prevProperties);
      }
  
      @Test
      public void testNullValue()
      {
          // expecting objects so test against explicit objects rather than using autoboxing
          assertNullValue(null, String.class);
          assertNullValue(Character.valueOf((char) 0), Character.TYPE);
          assertNullValue(Integer.valueOf(0), Integer.TYPE);
          assertNullValue(Long.valueOf(0), Long.TYPE);
          assertNullValue(Short.valueOf((short) 0), Short.TYPE);
          assertNullValue(Double.valueOf(0), Double.TYPE);
          assertNullValue(Float.valueOf(0), Float.TYPE);
          assertNullValue(Boolean.FALSE, Boolean.TYPE);
          assertNullValue(Byte.valueOf((byte) 0), Byte.TYPE);
      }
  
      private void assertNullValue(Object expected, Class<?> type)
      {
          assertEquals(expected, ProxyUtils.nullValue(type));
      }
  
      @Test
      public void testGetAllInterfaces()
      {
          assertNull(ProxyUtils.getAllInterfaces(null));
          assertEquals(Arrays.asList(new Class[] { DuplicateEcho.class, Serializable.class, Echo.class }),
                  Arrays.asList(ProxyUtils.getAllInterfaces(EchoImpl.class)));
      }
  
      @Test
      public void testGetJavaClassName() throws Exception
      {
          assertEquals("java.lang.Object[]", ProxyUtils.getJavaClassName(Object[].class));
          assertEquals("java.lang.Object[][]", ProxyUtils.getJavaClassName(Object[][].class));
          assertEquals("java.lang.String[][][]", ProxyUtils.getJavaClassName(String[][][].class));
          assertEquals("int", ProxyUtils.getJavaClassName(Integer.TYPE));
          assertEquals("float", ProxyUtils.getJavaClassName(Float.TYPE));
          assertEquals("long", ProxyUtils.getJavaClassName(Long.TYPE));
          assertEquals("double", ProxyUtils.getJavaClassName(Double.TYPE));
          assertEquals("short", ProxyUtils.getJavaClassName(Short.TYPE));
          assertEquals("byte", ProxyUtils.getJavaClassName(Byte.TYPE));
         assertEquals("char", ProxyUtils.getJavaClassName(Character.TYPE));
         assertEquals("boolean", ProxyUtils.getJavaClassName(Boolean.TYPE));
     }
 }