--- /dev/null
+package org.apache.lucene.analysis.ar;
+
+/**
+ * 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.IOException;
+import java.io.StringReader;
+
+import org.apache.lucene.analysis.BaseTokenStreamTestCase;
+import org.apache.lucene.analysis.CharArraySet;
+import org.apache.lucene.analysis.KeywordMarkerFilter;
+
+/**
+ * Test the Arabic Normalization Filter
+ *
+ */
+public class TestArabicStemFilter extends BaseTokenStreamTestCase {
+
+ public void testAlPrefix() throws IOException {
+ check("الحسن", "حسن");
+ }
+
+ public void testWalPrefix() throws IOException {
+ check("والحسن", "حسن");
+ }
+
+ public void testBalPrefix() throws IOException {
+ check("بالحسن", "حسن");
+ }
+
+ public void testKalPrefix() throws IOException {
+ check("كالحسن", "حسن");
+ }
+
+ public void testFalPrefix() throws IOException {
+ check("فالحسن", "حسن");
+ }
+
+ public void testLlPrefix() throws IOException {
+ check("للاخر", "اخر");
+ }
+
+ public void testWaPrefix() throws IOException {
+ check("وحسن", "حسن");
+ }
+
+ public void testAhSuffix() throws IOException {
+ check("زوجها", "زوج");
+ }
+
+ public void testAnSuffix() throws IOException {
+ check("ساهدان", "ساهد");
+ }
+
+ public void testAtSuffix() throws IOException {
+ check("ساهدات", "ساهد");
+ }
+
+ public void testWnSuffix() throws IOException {
+ check("ساهدون", "ساهد");
+ }
+
+ public void testYnSuffix() throws IOException {
+ check("ساهدين", "ساهد");
+ }
+
+ public void testYhSuffix() throws IOException {
+ check("ساهديه", "ساهد");
+ }
+
+ public void testYpSuffix() throws IOException {
+ check("ساهدية", "ساهد");
+ }
+
+ public void testHSuffix() throws IOException {
+ check("ساهده", "ساهد");
+ }
+
+ public void testPSuffix() throws IOException {
+ check("ساهدة", "ساهد");
+ }
+
+ public void testYSuffix() throws IOException {
+ check("ساهدي", "ساهد");
+ }
+
+ public void testComboPrefSuf() throws IOException {
+ check("وساهدون", "ساهد");
+ }
+
+ public void testComboSuf() throws IOException {
+ check("ساهدهات", "ساهد");
+ }
+
+ public void testShouldntStem() throws IOException {
+ check("الو", "الو");
+ }
+
+ public void testNonArabic() throws IOException {
+ check("English", "English");
+ }
+
+ public void testWithKeywordAttribute() throws IOException {
+ CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
+ set.add("ساهدهات");
+ ArabicLetterTokenizer tokenStream = new ArabicLetterTokenizer(TEST_VERSION_CURRENT, new StringReader("ساهدهات"));
+
+ ArabicStemFilter filter = new ArabicStemFilter(new KeywordMarkerFilter(tokenStream, set));
+ assertTokenStreamContents(filter, new String[]{"ساهدهات"});
+ }
+
+ private void check(final String input, final String expected) throws IOException {
+ ArabicLetterTokenizer tokenStream = new ArabicLetterTokenizer(TEST_VERSION_CURRENT, new StringReader(input));
+ ArabicStemFilter filter = new ArabicStemFilter(tokenStream);
+ assertTokenStreamContents(filter, new String[]{expected});
+ }
+}