src/test/java/org/apache/commons/proxy/TestProxyUtils.java

/*
 * 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.proxy;

import junit.framework.TestCase;
import org.apache.commons.proxy.factory.javassist.JavassistProxyFactory;
import org.apache.commons.proxy.util.DuplicateEcho;
import org.apache.commons.proxy.util.Echo;
import org.apache.commons.proxy.util.EchoImpl;

import java.io.Serializable;
import java.util.Arrays;
import java.util.Properties;

public class TestProxyUtils extends TestCase
{
    private Properties prevProperties;

    protected void setUp() throws Exception
    {
        prevProperties = System.getProperties();
        System.setProperties( new Properties() );
    }

    protected void tearDown() throws Exception
    {
        System.setProperties( prevProperties );
    }

    public void testCreateNullObject() throws Exception
    {
        final Echo nullEcho = ( Echo ) ProxyUtils
                .createNullObject( new JavassistProxyFactory(), new Class[]{ Echo.class } );
        assertNull( nullEcho.echoBack( "hello" ) );
        assertNull( nullEcho.echoBack( "hello", "world" ) );
        assertEquals( ( int ) 0, nullEcho.echoBack( 12345 ) );
    }

    public void testCreateNullObjectWithClassLoader() throws Exception
    {
        final Echo nullEcho = ( Echo ) ProxyUtils.createNullObject( new JavassistProxyFactory(),
                                                                    Echo.class.getClassLoader(),
                                                                    new Class[]{ Echo.class } );
        assertNull( nullEcho.echoBack( "hello" ) );
        assertNull( nullEcho.echoBack( "hello", "world" ) );
        assertEquals( ( int ) 0, nullEcho.echoBack( 12345 ) );
    }

    public void testGetAllInterfaces()
    {
        assertNull( ProxyUtils.getAllInterfaces( null ) );
        assertEquals( Arrays.asList( new Class[] { DuplicateEcho.class, Serializable.class, Echo.class } ), Arrays.asList( ProxyUtils.getAllInterfaces( EchoImpl.class ) ) );
    }

    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 ) );
    }
}