/*
 * Copyright 2005-2010 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.ws.server.endpoint;

import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;

import org.springframework.xml.transform.StringResult;
import org.springframework.xml.transform.StringSource;

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

import static org.custommonkey.xmlunit.XMLAssert.assertXMLEqual;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;

public abstract class AbstractPayloadEndpointTestCase extends AbstractEndpointTestCase {

	private PayloadEndpoint endpoint;

	private Transformer transformer;

	@Before
	public void createEndpoint() throws Exception {
		endpoint = createResponseEndpoint();
		transformer = TransformerFactory.newInstance().newTransformer();
	}

	@Test
	public void testNoResponse() throws Exception {
		endpoint = createNoResponseEndpoint();
		StringSource requestSource = new StringSource(REQUEST);
		Source resultSource = endpoint.invoke(requestSource);
		assertNull("Response source returned", resultSource);
	}

	@Test
	public void testNoRequest() throws Exception {
		endpoint = createNoRequestEndpoint();
		Source resultSource = endpoint.invoke(null);
		assertNull("Response source returned", resultSource);
	}

	@Override
	protected final void testSource(Source requestSource) throws Exception {
		Source responseSource = endpoint.invoke(requestSource);
		assertNotNull("No response source returned", responseSource);
		StringResult result = new StringResult();
		transformer.transform(responseSource, result);
		assertXMLEqual(RESPONSE, result.toString());
	}

	protected abstract PayloadEndpoint createNoResponseEndpoint() throws Exception;

	protected abstract PayloadEndpoint createResponseEndpoint() throws Exception;

	protected abstract PayloadEndpoint createNoRequestEndpoint() throws Exception;
}