pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / analyzers / common / src / test / org / apache / lucene / analysis / de / TestGermanStemFilter.java

diff --git a/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/de/TestGermanStemFilter.java b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/de/TestGermanStemFilter.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/de/TestGermanStemFilter.java
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+package org.apache.lucene.analysis.de;
+
+/**
+ * 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.InputStream;
+import java.io.Reader;
+
+import org.apache.lucene.analysis.Analyzer;
+import org.apache.lucene.analysis.BaseTokenStreamTestCase;
+import org.apache.lucene.analysis.KeywordTokenizer;
+import org.apache.lucene.analysis.LowerCaseFilter;
+import org.apache.lucene.analysis.Tokenizer;
+import org.apache.lucene.analysis.ReusableAnalyzerBase;
+
+import static org.apache.lucene.analysis.VocabularyAssert.*;
+
+/**
+ * Test the German stemmer. The stemming algorithm is known to work less 
+ * than perfect, as it doesn't use any word lists with exceptions. We 
+ * also check some of the cases where the algorithm is wrong.
+ *
+ */
+public class TestGermanStemFilter extends BaseTokenStreamTestCase {
+  Analyzer analyzer = new ReusableAnalyzerBase() {
+    @Override
+    protected TokenStreamComponents createComponents(String fieldName,
+        Reader reader) {
+      Tokenizer t = new KeywordTokenizer(reader);
+      return new TokenStreamComponents(t,
+          new GermanStemFilter(new LowerCaseFilter(TEST_VERSION_CURRENT, t)));
+    }
+  };
+
+  public void testStemming() throws Exception {  
+    InputStream vocOut = getClass().getResourceAsStream("data.txt");
+    assertVocabulary(analyzer, vocOut);
+    vocOut.close();
+  }
+  
+  // LUCENE-3043: we use keywordtokenizer in this test,
+  // so ensure the stemmer does not crash on zero-length strings.
+  public void testEmpty() throws Exception {
+    assertAnalyzesTo(analyzer, "", new String[] { "" });
+  }
+  
+  /** blast some random strings through the analyzer */
+  public void testRandomStrings() throws Exception {
+    checkRandomData(random, analyzer, 10000*RANDOM_MULTIPLIER);
+  }
+}