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Viewing changes to lucene/contrib/spellchecker/src/test/org/apache/lucene/search/spell/TestLevenshteinDistance.java

  • Committer: Sebastian Meyer
  • Date: 2012-08-03 09:12:40 UTC
  • Revision ID: sebastian.meyer@slub-dresden.de-20120803091240-x6861b0vabq1xror
https://launchpad.net/bugs/985487
Remove Lucene and Solr source code and add patches instead
Fix Bug #985487: Auto-suggestion for the search interface

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lucene/contrib/spellchecker/src/test/org/apache/lucene/search/spell/TestLevenshteinDistance.java
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package org.apache.lucene.search.spell;
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/**
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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements.  See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License.  You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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import org.apache.lucene.util.LuceneTestCase;
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public class TestLevenshteinDistance extends LuceneTestCase {
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  private StringDistance sd = new LevensteinDistance();
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  public void testGetDistance() {
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    float d = sd.getDistance("al", "al");
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    assertEquals(d,1.0f,0.001);
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    d = sd.getDistance("martha", "marhta");
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    assertEquals(d,0.6666,0.001);
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    d = sd.getDistance("jones", "johnson");
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    assertEquals(d,0.4285,0.001);
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    d = sd.getDistance("abcvwxyz", "cabvwxyz");
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    assertEquals(d,0.75,0.001);    
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    d = sd.getDistance("dwayne", "duane");
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    assertEquals(d,0.666,0.001);
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    d = sd.getDistance("dixon", "dicksonx");
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    assertEquals(d,0.5,0.001);
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    d = sd.getDistance("six", "ten");
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    assertEquals(d,0,0.001);
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    float d1 = sd.getDistance("zac ephron", "zac efron");
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    float d2 = sd.getDistance("zac ephron", "kai ephron");
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    assertEquals(d1,d2,0.001);
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    d1 = sd.getDistance("brittney spears", "britney spears");
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    d2 = sd.getDistance("brittney spears", "brittney startzman");
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    assertTrue(d1 > d2);
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  }
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  public void testEmpty() throws Exception {
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    float d = sd.getDistance("", "al");
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    assertEquals(d,0.0f,0.001);
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  }
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}