/* | |
* 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.ObjectProvider; | |
import org.apache.commons.proxy.ProxyFactory; | |
import org.apache.commons.proxy.provider.ConstantProvider; | |
import java.io.Serializable; | |
/** | |
* | |
*/ | |
public class TestDuckTypingInvoker extends TestCase | |
{ | |
//---------------------------------------------------------------------------------------------------------------------- | |
// Other Methods | |
//---------------------------------------------------------------------------------------------------------------------- | |
public void testExactSignatureMatch() | |
{ | |
final ObjectProvider targetProvider = new ConstantProvider( new LegacyDuck() ); | |
final DuckTypingInvoker invoker = new DuckTypingInvoker( targetProvider ); | |
final Duck duck = ( Duck ) new ProxyFactory().createInvokerProxy( invoker, new Class[]{ Duck.class } ); | |
assertEquals( "Quack!", duck.sayQuack() ); | |
} | |
public void testNoMatchingMethod() | |
{ | |
final ObjectProvider targetProvider = new ConstantProvider( new LegacyDuck() ); | |
final DuckTypingInvoker invoker = new DuckTypingInvoker( targetProvider ); | |
final Goose goose = ( Goose ) new ProxyFactory().createInvokerProxy( invoker, new Class[]{ Goose.class } ); | |
try | |
{ | |
goose.sayHonk(); | |
fail( "No matching method should be found." ); | |
} | |
catch ( UnsupportedOperationException e ) | |
{ | |
// Do nothing, expected behavior! | |
} | |
} | |
public void testMismatchingParameterType() | |
{ | |
final ObjectProvider targetProvider = new ConstantProvider( new LegacyDuck() ); | |
final DuckTypingInvoker invoker = new DuckTypingInvoker( targetProvider ); | |
final ParameterizedDuck parameterizedDuck = ( ParameterizedDuck ) new ProxyFactory() | |
.createInvokerProxy( invoker, new Class[]{ ParameterizedDuck.class } ); | |
try | |
{ | |
parameterizedDuck.sayQuack("Elmer"); | |
fail( "No matching method should be found." ); | |
} | |
catch ( UnsupportedOperationException e ) | |
{ | |
// Do nothing, expected behavior! | |
} | |
} | |
public void testTargetHasCompatibleReturnType() | |
{ | |
final ObjectProvider targetProvider = new ConstantProvider( new LegacyDuck() ); | |
final DuckTypingInvoker invoker = new DuckTypingInvoker( targetProvider ); | |
final SerializableDuck duck = ( SerializableDuck ) new ProxyFactory().createInvokerProxy( invoker, new Class[]{ | |
SerializableDuck.class } ); | |
assertEquals("Quack!", duck.sayQuack() ); | |
} | |
public void testMismatchingReturnType() | |
{ | |
final ObjectProvider targetProvider = new ConstantProvider( new LegacyDuck() ); | |
final DuckTypingInvoker invoker = new DuckTypingInvoker( targetProvider ); | |
final VoidReturnDuck voidDuck = ( VoidReturnDuck ) new ProxyFactory().createInvokerProxy( invoker, new Class[]{ | |
VoidReturnDuck.class } ); | |
try | |
{ | |
voidDuck.sayQuack(); | |
fail( "No matching method should be found." ); | |
} | |
catch ( UnsupportedOperationException e ) | |
{ | |
// Do nothing, expected behavior! | |
} | |
} | |
//---------------------------------------------------------------------------------------------------------------------- | |
// Inner Classes | |
//---------------------------------------------------------------------------------------------------------------------- | |
public static class LegacyDuck | |
{ | |
public String sayQuack() | |
{ | |
return "Quack!"; | |
} | |
} | |
public interface Duck | |
{ | |
public String sayQuack(); | |
} | |
public interface SerializableDuck | |
{ | |
public Serializable sayQuack(); | |
} | |
public interface ParameterizedDuck | |
{ | |
public String sayQuack( String recipient ); | |
} | |
public interface VoidReturnDuck | |
{ | |
public void sayQuack(); | |
} | |
public interface Goose | |
{ | |
public void sayHonk(); | |
} | |
} |