package org.apache.lucene.util.automaton;
/**
* 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.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util._TestUtil;
/**
* Not thorough, but tries to test determinism correctness
* somewhat randomly, by determinizing a huge random lexicon.
*/
public class TestDeterminizeLexicon extends LuceneTestCase {
private List<Automaton> automata = new ArrayList<Automaton>();
private List<String> terms = new ArrayList<String>();
private Random random;
public void testLexicon() throws Exception {
random = newRandom();
int num = 3 * RANDOM_MULTIPLIER;
for (int i = 0; i < num; i++) {
automata.clear();
terms.clear();
for (int j = 0; j < 5000; j++) {
String randomString = _TestUtil.randomUnicodeString(random);
terms.add(randomString);
automata.add(BasicAutomata.makeString(randomString));
}
assertLexicon();
}
}
public void assertLexicon() throws Exception {
Collections.shuffle(automata, random);
final Automaton lex = BasicOperations.union(automata);
lex.determinize();
assertTrue(SpecialOperations.isFinite(lex));
for (String s : terms) {
assertTrue(BasicOperations.run(lex, s));
}
final ByteRunAutomaton lexByte = new ByteRunAutomaton(lex);
for (String s : terms) {
byte bytes[] = s.getBytes("UTF-8");
assertTrue(lexByte.run(bytes, 0, bytes.length));
}
}
}