/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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
*
* 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.apache.stanbol.enhancer.engines.langid;
import static junit.framework.Assert.assertEquals;
import static org.apache.stanbol.enhancer.test.helper.EnhancementStructureHelper.validateAllEntityAnnotations;
import static org.apache.stanbol.enhancer.test.helper.EnhancementStructureHelper.validateAllTextAnnotations;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import org.apache.clerezza.rdf.core.LiteralFactory;
import org.apache.clerezza.rdf.core.Resource;
import org.apache.clerezza.rdf.core.UriRef;
import org.apache.commons.io.IOUtils;
import org.apache.stanbol.enhancer.contentitem.inmemory.InMemoryContentItemFactory;
import org.apache.stanbol.enhancer.engines.langid.LangIdEnhancementEngine;
import org.apache.stanbol.enhancer.servicesapi.ContentItem;
import org.apache.stanbol.enhancer.servicesapi.ContentItemFactory;
import org.apache.stanbol.enhancer.servicesapi.EngineException;
import org.apache.stanbol.enhancer.servicesapi.EnhancementEngine;
import org.apache.stanbol.enhancer.servicesapi.helper.EnhancementEngineHelper;
import org.apache.stanbol.enhancer.servicesapi.impl.StringSource;
import org.apache.stanbol.enhancer.servicesapi.rdf.Properties;
import org.apache.tika.language.LanguageIdentifier;
import org.junit.BeforeClass;
import org.junit.Test;
import org.osgi.service.cm.ConfigurationException;
import org.osgi.service.component.ComponentContext;
/**
* {@link LangIdEngineTest} is a test class for {@link TextCategorizer}.
*
* @author Joerg Steffen, DFKI
* @version $Id: LangIdTest.java 1145590 2011-07-12 13:26:39Z wkasper $
*/
public class LangIdEngineTest {
private static final ContentItemFactory ciFactory = InMemoryContentItemFactory.getInstance();
private static final String TEST_FILE_NAME = "en.txt";
/**
* This contains the text used for testing
*/
private static String text;
/**
* This initializes the text categorizer.
*/
@BeforeClass
public static void oneTimeSetUp() throws IOException {
LanguageIdentifier.initProfiles();
InputStream in = LangIdEngineTest.class.getClassLoader().getResourceAsStream(
TEST_FILE_NAME);
assertNotNull("failed to load resource " + TEST_FILE_NAME, in);
text = IOUtils.toString(in);
}
/**
* Tests the language identification.
*
* @throws IOException if there is an error when reading the text
*/
@Test
public void testLangId() throws IOException {
LanguageIdentifier tc = new LanguageIdentifier(text);
String language = tc.getLanguage();
assertEquals("en", language);
}
/**
* Test the engine and validates the created enhancements
* @throws EngineException
* @throws IOException
* @throws ConfigurationException
*/
@Test
public void testEngine() throws EngineException, IOException, ConfigurationException {
LangIdEnhancementEngine langIdEngine = new LangIdEnhancementEngine();
ComponentContext context = new MockComponentContext();
context.getProperties().put(EnhancementEngine.PROPERTY_NAME, "langid");
langIdEngine.activate(context);
ContentItem ci = ciFactory.createContentItem(new StringSource(text));
langIdEngine.computeEnhancements(ci);
HashMap<UriRef,Resource> expectedValues = new HashMap<UriRef,Resource>();
expectedValues.put(Properties.ENHANCER_EXTRACTED_FROM, ci.getUri());
expectedValues.put(Properties.DC_CREATOR, LiteralFactory.getInstance().createTypedLiteral(
langIdEngine.getClass().getName()));
int textAnnotationCount = validateAllTextAnnotations(ci.getMetadata(), text, expectedValues);
assertEquals("A single TextAnnotation is expected", 1,textAnnotationCount);
//even through this tests do not validate service quality but rather
//the correct integration of the CELI service as EnhancementEngine
//we expect the "en" is detected for the parsed text
assertEquals("The detected language for text '"+text+"' MUST BE 'en'",
"en",EnhancementEngineHelper.getLanguage(ci));
int entityAnnoNum = validateAllEntityAnnotations(ci.getMetadata(), expectedValues);
assertEquals("No EntityAnnotations are expected",0, entityAnnoNum);
}
}