yang/yang-model-export/src/test/java/org/opendaylight/yangtools/yang/model/export/test/SchemaContextEmitterTest.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.yangtools.yang.model.export.test;
  10
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertNotEquals;
  13 import static org.junit.Assert.assertNotNull;
  14
  15 import com.google.common.base.Preconditions;
  16 import java.io.BufferedOutputStream;
  17 import java.io.ByteArrayOutputStream;
  18 import java.io.IOException;
  19 import java.io.InputStream;
  20 import java.io.OutputStream;
  21 import java.io.StringWriter;
  22 import java.net.URISyntaxException;
  23 import javax.xml.parsers.DocumentBuilder;
  24 import javax.xml.parsers.DocumentBuilderFactory;
  25 import javax.xml.parsers.ParserConfigurationException;
  26 import javax.xml.stream.XMLStreamException;
  27 import javax.xml.transform.OutputKeys;
  28 import javax.xml.transform.Transformer;
  29 import javax.xml.transform.TransformerException;
  30 import javax.xml.transform.TransformerFactory;
  31 import javax.xml.transform.TransformerFactoryConfigurationError;
  32 import javax.xml.transform.dom.DOMSource;
  33 import javax.xml.transform.stream.StreamResult;
  34 import org.custommonkey.xmlunit.Diff;
  35 import org.custommonkey.xmlunit.ElementNameAndAttributeQualifier;
  36 import org.custommonkey.xmlunit.XMLAssert;
  37 import org.custommonkey.xmlunit.XMLUnit;
  38 import org.junit.Test;
  39 import org.opendaylight.yangtools.yang.model.api.Module;
  40 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  41 import org.opendaylight.yangtools.yang.model.export.YinExportUtils;
  42 import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
  43 import org.w3c.dom.Document;
  44 import org.w3c.dom.Node;
  45 import org.xml.sax.SAXException;
  46
  47 public class SchemaContextEmitterTest {
  48
  49     @Test
  50     public void testSchemaContextEmitter() throws ReactorException, IOException, URISyntaxException,
  51             XMLStreamException, SAXException {
  52         final SchemaContext schemaContext = StmtTestUtils.parseYangSources("/schema-context-emitter-test");
  53         assertNotNull(schemaContext);
  54         assertEquals(1, schemaContext.getModules().size());
  55
  56         final OutputStream byteArrayOutputStream = new ByteArrayOutputStream();
  57         final BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(byteArrayOutputStream);
  58
  59         for (Module module : schemaContext.getModules()) {
  60             YinExportUtils.writeModuleToOutputStream(schemaContext, module, bufferedOutputStream);
  61         }
  62
  63         final String output = byteArrayOutputStream.toString();
  64         assertNotNull(output);
  65         assertNotEquals(0, output.length());
  66
  67         final Document doc = loadDocument("/schema-context-emitter-test/foo.xml");
  68         final String expected = toString(doc.getDocumentElement());
  69
  70         XMLUnit.setIgnoreWhitespace(true);
  71         XMLUnit.setNormalize(true);
  72
  73         final Diff diff = new Diff(expected, output);
  74         diff.overrideElementQualifier(new ElementNameAndAttributeQualifier());
  75         XMLAssert.assertXMLEqual(diff, true);
  76     }
  77
  78     private static Document loadDocument(final String xmlPath) throws IOException, SAXException {
  79         final InputStream resourceAsStream = SchemaContextEmitterTest.class.getResourceAsStream(xmlPath);
  80         final Document currentConfigElement = readXmlToDocument(resourceAsStream);
  81         Preconditions.checkNotNull(currentConfigElement);
  82         return currentConfigElement;
  83     }
  84
  85     private static Document readXmlToDocument(final InputStream xmlContent) throws IOException, SAXException {
  86         final DocumentBuilder dBuilder;
  87         try {
  88             DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  89             factory.setNamespaceAware(true);
  90             factory.setCoalescing(true);
  91             factory.setIgnoringElementContentWhitespace(true);
  92             factory.setIgnoringComments(true);
  93             dBuilder = factory.newDocumentBuilder();
  94         } catch (final ParserConfigurationException e) {
  95             throw new RuntimeException("Failed to parse XML document", e);
  96         }
  97         final Document doc = dBuilder.parse(xmlContent);
  98
  99         doc.getDocumentElement().normalize();
 100         return doc;
 101     }
 102
 103     private static String toString(final Node xml) {
 104         try {
 105             final Transformer transformer = TransformerFactory.newInstance().newTransformer();
 106             transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 107             transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
 108
 109             final StreamResult result = new StreamResult(new StringWriter());
 110             final DOMSource source = new DOMSource(xml);
 111             transformer.transform(source, result);
 112
 113             return result.getWriter().toString();
 114         } catch (IllegalArgumentException | TransformerFactoryConfigurationError | TransformerException e) {
 115             throw new RuntimeException("Unable to serialize xml element " + xml, e);
 116         }
 117     }
 118 }