package org.apache.lucene.search.spell;
/*
* 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.
*/
import java.io.IOException;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.analysis.MockTokenizer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefIterator;
import org.apache.lucene.util.LuceneTestCase;
/**
* Test case for LuceneDictionary.
* It first creates a simple index and then a couple of instances of LuceneDictionary
* on different fields and checks if all the right text comes back.
*/
public class TestLuceneDictionary extends LuceneTestCase {
private Directory store;
private IndexReader indexReader = null;
private LuceneDictionary ld;
private BytesRefIterator it;
private BytesRef spare = new BytesRef();
@Override
public void setUp() throws Exception {
super.setUp();
store = newDirectory();
IndexWriter writer = new IndexWriter(store, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random(), MockTokenizer.WHITESPACE, false)));
Document doc;
doc = new Document();
doc.add(newTextField("aaa", "foo", Field.Store.YES));
writer.addDocument(doc);
doc = new Document();
doc.add(newTextField("aaa", "foo", Field.Store.YES));
writer.addDocument(doc);
doc = new Document();
doc.add(newTextField("contents", "Tom", Field.Store.YES));
writer.addDocument(doc);
doc = new Document();
doc.add(newTextField("contents", "Jerry", Field.Store.YES));
writer.addDocument(doc);
doc = new Document();
doc.add(newTextField("zzz", "bar", Field.Store.YES));
writer.addDocument(doc);
writer.forceMerge(1);
writer.close();
}
@Override
public void tearDown() throws Exception {
if (indexReader != null)
indexReader.close();
store.close();
super.tearDown();
}
public void testFieldNonExistent() throws IOException {
try {
indexReader = DirectoryReader.open(store);
ld = new LuceneDictionary(indexReader, "nonexistent_field");
it = ld.getWordsIterator();
assertNull("More elements than expected", spare = it.next());
} finally {
if (indexReader != null) { indexReader.close(); }
}
}
public void testFieldAaa() throws IOException {
try {
indexReader = DirectoryReader.open(store);
ld = new LuceneDictionary(indexReader, "aaa");
it = ld.getWordsIterator();
assertNotNull("First element doesn't exist.", spare = it.next());
assertTrue("First element isn't correct", spare.utf8ToString().equals("foo"));
assertNull("More elements than expected", it.next());
} finally {
if (indexReader != null) { indexReader.close(); }
}
}
public void testFieldContents_1() throws IOException {
try {
indexReader = DirectoryReader.open(store);
ld = new LuceneDictionary(indexReader, "contents");
it = ld.getWordsIterator();
assertNotNull("First element doesn't exist.", spare = it.next());
assertTrue("First element isn't correct", spare.utf8ToString().equals("Jerry"));
assertNotNull("Second element doesn't exist.", spare = it.next());
assertTrue("Second element isn't correct", spare.utf8ToString().equals("Tom"));
assertNull("More elements than expected", it.next());
ld = new LuceneDictionary(indexReader, "contents");
it = ld.getWordsIterator();
int counter = 2;
while (it.next() != null) {
counter--;
}
assertTrue("Number of words incorrect", counter == 0);
}
finally {
if (indexReader != null) { indexReader.close(); }
}
}
public void testFieldContents_2() throws IOException {
try {
indexReader = DirectoryReader.open(store);
ld = new LuceneDictionary(indexReader, "contents");
it = ld.getWordsIterator();
// just iterate through words
assertEquals("First element isn't correct", "Jerry", it.next().utf8ToString());
assertEquals("Second element isn't correct", "Tom", it.next().utf8ToString());
assertNull("Nonexistent element is really null", it.next());
}
finally {
if (indexReader != null) { indexReader.close(); }
}
}
public void testFieldZzz() throws IOException {
try {
indexReader = DirectoryReader.open(store);
ld = new LuceneDictionary(indexReader, "zzz");
it = ld.getWordsIterator();
assertNotNull("First element doesn't exist.", spare = it.next());
assertEquals("First element isn't correct", "bar", spare.utf8ToString());
assertNull("More elements than expected", it.next());
}
finally {
if (indexReader != null) { indexReader.close(); }
}
}
public void testSpellchecker() throws IOException {
Directory dir = newDirectory();
SpellChecker sc = new SpellChecker(dir);
indexReader = DirectoryReader.open(store);
sc.indexDictionary(new LuceneDictionary(indexReader, "contents"), newIndexWriterConfig(TEST_VERSION_CURRENT, null), false);
String[] suggestions = sc.suggestSimilar("Tam", 1);
assertEquals(1, suggestions.length);
assertEquals("Tom", suggestions[0]);
suggestions = sc.suggestSimilar("Jarry", 1);
assertEquals(1, suggestions.length);
assertEquals("Jerry", suggestions[0]);
indexReader.close();
sc.close();
dir.close();
}
}