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/*
 * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.sal.restconf.impl.nn.to.json.test;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.ws.rs.core.MediaType;
import org.junit.BeforeClass;
import org.junit.Test;
import org.opendaylight.controller.md.sal.rest.common.TestRestconfUtils;
import org.opendaylight.controller.sal.rest.impl.test.providers.AbstractBodyReaderTest;
import org.opendaylight.netconf.sal.rest.impl.NormalizedNodeContext;
import org.opendaylight.netconf.sal.rest.impl.NormalizedNodeJsonBodyWriter;
import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;

public class NnToJsonLeafrefType extends AbstractBodyReaderTest {

    private static EffectiveModelContext schemaContext;
    private final NormalizedNodeJsonBodyWriter jsonBodyWriter;

    public NnToJsonLeafrefType() {
        super(schemaContext, null);
        jsonBodyWriter = new NormalizedNodeJsonBodyWriter();
    }

    @BeforeClass
    public static void initialization() {
        schemaContext = schemaContextLoader("/nn-to-json/leafref", schemaContext);
    }

    @Test
    public void leafrefAbsolutePathToExistingLeafTest() throws Exception {
        final String json = toJson("/nn-to-json/leafref/xml/data_absolut_ref_to_existing_leaf.xml");
        validateJson(".*\"lf3\":\\p{Blank}*\"true\".*", json);
    }

    @Test
    public void leafrefRelativePathToExistingLeafTest() throws Exception {
        final String json = toJson("/nn-to-json/leafref/xml/data_relativ_ref_to_existing_leaf.xml");
        validateJson(".*\"lf2\":\\p{Blank}*\"121\".*", json);
    }

    @Test(expected = NullPointerException.class)
    public void leafrefToNonExistingLeafTest() throws Exception {
        toJson("/nn-to-json/leafref/xml/data_ref_to_non_existing_leaf.xml");
    }

    @Test
    public void leafrefToNotLeafTest() throws Exception {
        final String json = toJson("/nn-to-json/leafref/xml/data_ref_to_not_leaf.xml");
        validateJson(
                ".*\"cont-augment-module\\p{Blank}*:\\p{Blank}*lf6\":\\p{Blank}*\"44\".*",
                json);
    }

    @Test
    public void leafrefFromLeafListToLeafTest() throws Exception {
        final String json = toJson("/nn-to-json/leafref/xml/data_relativ_ref_from_leaflist_to_existing_leaf.xml");
        validateJson(".*\"cont-augment-module\\p{Blank}*:\\p{Blank}*lflst1\":\\p{Blank}*.*\"34[5|6|7]\",*\"34[5|6|7]\","
                + "*\"34[5|6|7]\".*", json);
    }

    @Test
    public void leafrefFromLeafrefToLeafrefTest() throws Exception {
        final String json = toJson("/nn-to-json/leafref/xml/data_from_leafref_to_leafref.xml");
        validateJson(
                ".*\"cont-augment-module\\p{Blank}*:\\p{Blank}*lf7\":\\p{Blank}*\"200\".*",
                json);
    }

    private static void validateJson(final String regex, final String value) {
        assertNotNull(value);
        final Pattern ptrn = Pattern.compile(regex, Pattern.DOTALL);
        final Matcher mtch = ptrn.matcher(value);
        assertTrue(mtch.matches());
    }

    private String toJson(final String xmlDataPath) throws Exception {
        final String uri = "main-module:cont";
        final String pathToInputFile = xmlDataPath;

        final NormalizedNodeContext testNN = TestRestconfUtils
                .loadNormalizedContextFromXmlFile(pathToInputFile, uri, controllerContext);

        final OutputStream output = new ByteArrayOutputStream();
        jsonBodyWriter.writeTo(testNN, null, null, null, mediaType, null,
                output);
        final String jsonOutput = output.toString();

        return jsonOutput;
    }

    @Override
    protected MediaType getMediaType() {
        return new MediaType(MediaType.APPLICATION_XML, null);
    }
}