/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.security.xslt;

import static org.easymock.EasyMock.createMock;
import static org.easymock.EasyMock.expect;
import static org.easymock.EasyMock.replay;
import static org.easymock.EasyMock.verify;
import static org.junit.Assert.assertTrue;

import java.io.InputStream;
import java.io.StringWriter;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.LogFactory;
import org.apereo.portal.xml.ResourceLoaderURIResolver;
import org.custommonkey.xmlunit.Diff;
import org.custommonkey.xmlunit.XMLUnit;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassRelativeResourceLoader;
import org.springframework.util.xml.SimpleTransformErrorListener;

/**
 */
public class XalanMessageHelperTest {
    protected final Logger logger = LoggerFactory.getLogger(getClass());

    private TransformerFactory tFactory;
    private StreamSource xmlSource;

    @Before
    public void setup() throws Exception {
        final ResourceLoaderURIResolver resolver =
                new ResourceLoaderURIResolver(new ClassRelativeResourceLoader(getClass()));

        this.tFactory = TransformerFactory.newInstance();
        this.tFactory.setURIResolver(resolver);
        this.tFactory.setErrorListener(
                new SimpleTransformErrorListener(LogFactory.getLog(getClass())));

        this.xmlSource = new StreamSource(this.getClass().getResourceAsStream("test.xml"));
    }

    @Test
    public void testIsUserDeepMemberOf() throws Exception {
        final IXalanMessageHelper helperBean = createMock(IXalanMessageHelper.class);

        expect(helperBean.getMessage("im.done", "en_us")).andReturn("I'm Done!");

        replay(helperBean);

        XalanMessageHelper helper = new XalanMessageHelper();
        helper.setMessageHelper(helperBean);

        // set up configuration in the transformer impl
        final StringWriter resultWriter = new StringWriter();

        final InputStream xslStream = this.getClass().getResourceAsStream("messagesTest.xsl");
        final StreamSource xslSource = new StreamSource(xslStream);
        final Transformer transformer = tFactory.newTransformer(xslSource);

        transformer.setParameter("USER_LANG", "en_us");

        transformer.transform(xmlSource, new StreamResult(resultWriter));

        final String result = resultWriter.getBuffer().toString();
        logger.debug(result);

        final String expected =
                IOUtils.toString(this.getClass().getResourceAsStream("messagesResult.xml"));

        XMLUnit.setIgnoreWhitespace(true);
        Diff d = new Diff(expected, result);
        assertTrue("Transformation result differs from what's expected" + d, d.similar());

        verify(helperBean);
    }
}