/*
 * Copyright 2002-2016 the original author or authors.
 *
 * 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 org.springframework.messaging.core;

import org.junit.Test;

import static org.junit.Assert.*;
import static org.mockito.BDDMockito.*;

/**
 * Unit tests for {@link CachingDestinationResolverProxy}.
 *
 * @author Agim Emruli
 * @author Juergen Hoeller
 */
public class CachingDestinationResolverTests {

	@Test
	public void cachedDestination() {
		@SuppressWarnings("unchecked")
		DestinationResolver<String> destinationResolver = mock(DestinationResolver.class);
		CachingDestinationResolverProxy<String> cachingDestinationResolver = new CachingDestinationResolverProxy<>(destinationResolver);

		given(destinationResolver.resolveDestination("abcd")).willReturn("dcba");
		given(destinationResolver.resolveDestination("1234")).willReturn("4321");

		assertEquals("dcba", cachingDestinationResolver.resolveDestination("abcd"));
		assertEquals("4321", cachingDestinationResolver.resolveDestination("1234"));
		assertEquals("4321", cachingDestinationResolver.resolveDestination("1234"));
		assertEquals("dcba", cachingDestinationResolver.resolveDestination("abcd"));

		verify(destinationResolver, times(1)).resolveDestination("abcd");
		verify(destinationResolver, times(1)).resolveDestination("1234");
	}

	@Test(expected = IllegalArgumentException.class)
	public void noTargetSet() {
		CachingDestinationResolverProxy<String> cachingDestinationResolver = new CachingDestinationResolverProxy<>();
		cachingDestinationResolver.afterPropertiesSet();
	}

	@Test(expected = IllegalArgumentException.class)
	public void nullTargetThroughConstructor() {
		new CachingDestinationResolverProxy<String>(null);
	}

}