src/test/java/org/apache/commons/proxy/interceptor/TestLoggingInterceptor.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.interceptor;

import org.apache.commons.logging.Log;
import org.apache.commons.proxy.factory.cglib.CglibProxyFactory;
import org.apache.commons.proxy.util.Echo;
import org.apache.commons.proxy.util.EchoImpl;
import org.jmock.Mock;
import org.jmock.MockObjectTestCase;

import java.io.IOException;

public class TestLoggingInterceptor extends MockObjectTestCase
{
    private Mock logMock;
    private Echo echo;

    protected void setUp() throws Exception
    {
        logMock = mock( Log.class );
        echo = ( Echo ) new CglibProxyFactory()
                .createInterceptorProxy( new EchoImpl(), new LoggingInterceptor( ( Log ) logMock.proxy() ),
                                         new Class[]{ Echo.class } );
    }

    public void testWhenLoggingDisabled()
    {
        logMock = mock( Log.class );
        echo = ( Echo ) new CglibProxyFactory()
                .createInterceptorProxy( new EchoImpl(), new LoggingInterceptor( ( Log ) logMock.proxy() ),
                                         new Class[]{ Echo.class } );
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( false ) );
        echo.echoBack( "Hello" );

    }

    public void testWithArrayParameter()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN echoBack((java.lang.String[]){Hello, World})" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "END echoBack() [HelloWorld]" ) );
        echo.echoBack( new String[] { "Hello", "World" } );
    }

    public void testMultipleParameters()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN echoBack(Hello, World)" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "END echoBack() [HelloWorld]" ) );
        echo.echoBack( "Hello", "World" );
    }

    public void testNullReturnValue()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN echoBack(<null>)" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "END echoBack() [<null>]" ) );
        echo.echoBack( ( String )null );
    }

    public void testNonVoidMethod()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN echoBack(Hello)" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "END echoBack() [Hello]" ) );
        echo.echoBack( "Hello" );
    }

    public void testException()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN ioException()" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "EXCEPTION ioException() -- java.io.IOException" ), isA( IOException.class ) );
        try
        {
            echo.ioException();
            fail();
        }
        catch( IOException e )
        {

        }
    }

    public void testRuntimeException()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN illegalArgument()" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "EXCEPTION illegalArgument() -- java.lang.IllegalArgumentException" ), isA( IllegalArgumentException.class ) );
        try
        {
            echo.illegalArgument();
            fail();
        }
        catch( IllegalArgumentException e )
        {

        }
    }

    public void testVoidMethod()
    {
        logMock.expects( once() ).method( "isDebugEnabled" ).will( returnValue( true ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "BEGIN echo()" ) );
        logMock.expects( once() ).method( "debug" ).with( eq( "END echo()" ) );
        echo.echo();
    }

}