/*
 * 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
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package org.apache.lucene.analysis.stempel;

import org.apache.lucene.tests.util.LuceneTestCase;
import org.egothor.stemmer.Lift;
import org.egothor.stemmer.MultiTrie2;

public class TestTrieReduceKeepsInput extends LuceneTestCase {

  public void testLiftDoesNotModifyItsInput() {
    MultiTrie2 trie = new MultiTrie2(true);
    trie.add("aa", "Da");
    trie.reduce(new Lift(false));
    // reduce returns a new Trie, so the input should still have no answer for "a"; actual: "Da"
    assertEquals("", trie.getLastOnPath("a").toString());
  }
}