src/test/java/org/apache/commons/proxy/invoker/TestInvocationHandlerAdapter.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.invoker;
import junit.framework.TestCase;
import org.apache.commons.proxy.factory.javassist.JavassistProxyFactory;
import org.apache.commons.proxy.util.Echo;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

public class TestInvocationHandlerAdapter extends TestCase
{
    public void testMethodInvocation() throws Exception
    {
        InvocationHandlerTester tester = new InvocationHandlerTester();
        final Echo echo = ( Echo ) new JavassistProxyFactory().createInvokerProxy( new InvocationHandlerAdapter( tester ), new Class[] { Echo.class } );
        echo.echoBack( "hello" );
        assertEquals( Echo.class.getMethod( "echoBack", new Class[] { String.class } ), tester.method );
        assertSame( echo, tester.proxy );
        assertNotNull( tester.arguments );
        assertEquals( 1, tester.arguments.length );
        assertEquals( "hello", tester.arguments[0] );
    }

    private class InvocationHandlerTester implements InvocationHandler
    {
        private Object proxy;
        private Method method;
        private Object[] arguments;

        public Object invoke( Object proxy, Method method, Object[] args ) throws Throwable
        {
            this.proxy = proxy;
            this.method = method;
            this.arguments = args;
            return null;
        }
    }
}