/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
 * All rights reserved.
 *
 * Licensed 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 br.com.caelum.vraptor.proxy;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.nullValue;
import static org.junit.Assert.assertTrue;

import java.lang.reflect.Method;

import net.vidageek.mirror.dsl.Mirror;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

/**
 * @author Fabio Kung
 */
@SuppressWarnings("unchecked")
public class ReflectionInstanceCreatorTest {

	private Proxifier proxifier;

	@Before
	public void setUp() throws Exception {
	proxifier = new JavassistProxifier(new ReflectionInstanceCreator());
	}
	
	@Test
	public void shouldProxifyInterfaces() {
	TheInterface proxy = (TheInterface) proxifier.proxify(TheInterface.class, new MethodInvocation() {
		public Object intercept(Object proxy, Method method, Object[] args, SuperMethod superMethod) {
		return true;
		}
	});
	assertTrue(proxy.wasCalled());
	}

	@Test
	public void shouldProxifyConcreteClassesWithDefaultConstructors() {
	TheClass proxy = (TheClass) proxifier.proxify(TheClass.class, new MethodInvocation() {
		public Object intercept(Object proxy, Method method, Object[] args, SuperMethod superMethod) {
		return true;
		}
	});
	assertTrue(proxy.wasCalled());
	}

	@Test
	public void shouldProxifyConcreteClassesWithComplexConstructorsAndPassNullForAllParameters() {
	TheClassWithComplexConstructor proxy = (TheClassWithComplexConstructor) proxifier.proxify(TheClassWithComplexConstructor.class, new MethodInvocation() {
		public Object intercept(Object proxy, Method method, Object[] args, SuperMethod superMethod) {
		return superMethod.invoke(proxy, args);
		}
	});
	assertThat(proxy.getFirstDependency(), is(nullValue()));
	assertThat(proxy.getSecondDependency(), is(nullValue()));
	}

	@Test
	public void shouldTryAllConstructorsInDeclarationOrder() {
	TheClassWithManyConstructors proxy = (TheClassWithManyConstructors) proxifier.proxify(TheClassWithManyConstructors.class, new MethodInvocation() {
		public Object intercept(Object proxy, Method method, Object[] args, SuperMethod superMethod) {
		return superMethod.invoke(proxy, args);
		}
	});
	assertTrue(proxy.wasNumberConstructorCalled());
	assertThat(proxy.getNumber(), is(nullValue()));
	}

	@Test
	public void shouldNotProxifyJavaLangObjectMethods() throws Exception {
		Object proxy = proxifier.proxify(ReflectionInstanceCreatorTest.class, new MethodInvocation() {
			public Object intercept(Object proxy, Method method, Object[] args, SuperMethod superMethod) {
				Assert.fail("should not call this Method interceptor");
				return null;
			}
		});
		new Mirror().on(proxy).invoke().method("finalize").withoutArgs();
	}

}