/*
 * 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.lucene.util.automaton;

import org.apache.lucene.tests.util.LuceneTestCase;

public class TestBuilderAddEpsilonToItself extends LuceneTestCase {

  public void testEpsilonFromStateToItself() {
    Automaton.Builder b = new Automaton.Builder();
    int s = b.createState();
    b.addTransition(s, s, 'a', 'a');
    b.setAccept(s, true);
    // expected: a no-op that returns; actual: never returns, OutOfMemoryError: Java heap space
    b.addEpsilon(s, s);
    assertTrue(Operations.run(b.finish(), "aaa"));
  }
}