--- /dev/null
+package org.apache.lucene.analysis.miscellaneous;
+
+/**
+ * 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.util.Arrays;
+import java.util.regex.Pattern;
+
+import org.apache.lucene.analysis.BaseTokenStreamTestCase;
+import org.apache.lucene.analysis.StopAnalyzer;
+import org.apache.lucene.analysis.TokenStream;
+
+/**
+ * Verifies the behavior of PatternAnalyzer.
+ */
+public class PatternAnalyzerTest extends BaseTokenStreamTestCase {
+
+ /**
+ * Test PatternAnalyzer when it is configured with a non-word pattern.
+ * Behavior can be similar to SimpleAnalyzer (depending upon options)
+ */
+ public void testNonWordPattern() throws IOException {
+ // Split on non-letter pattern, do not lowercase, no stopwords
+ PatternAnalyzer a = new PatternAnalyzer(TEST_VERSION_CURRENT, PatternAnalyzer.NON_WORD_PATTERN,
+ false, null);
+ check(a, "The quick brown Fox,the abcd1234 (56.78) dc.", new String[] {
+ "The", "quick", "brown", "Fox", "the", "abcd", "dc" });
+
+ // split on non-letter pattern, lowercase, english stopwords
+ PatternAnalyzer b = new PatternAnalyzer(TEST_VERSION_CURRENT, PatternAnalyzer.NON_WORD_PATTERN,
+ true, StopAnalyzer.ENGLISH_STOP_WORDS_SET);
+ check(b, "The quick brown Fox,the abcd1234 (56.78) dc.", new String[] {
+ "quick", "brown", "fox", "abcd", "dc" });
+ }
+
+ /**
+ * Test PatternAnalyzer when it is configured with a whitespace pattern.
+ * Behavior can be similar to WhitespaceAnalyzer (depending upon options)
+ */
+ public void testWhitespacePattern() throws IOException {
+ // Split on whitespace patterns, do not lowercase, no stopwords
+ PatternAnalyzer a = new PatternAnalyzer(TEST_VERSION_CURRENT, PatternAnalyzer.WHITESPACE_PATTERN,
+ false, null);
+ check(a, "The quick brown Fox,the abcd1234 (56.78) dc.", new String[] {
+ "The", "quick", "brown", "Fox,the", "abcd1234", "(56.78)", "dc." });
+
+ // Split on whitespace patterns, lowercase, english stopwords
+ PatternAnalyzer b = new PatternAnalyzer(TEST_VERSION_CURRENT, PatternAnalyzer.WHITESPACE_PATTERN,
+ true, StopAnalyzer.ENGLISH_STOP_WORDS_SET);
+ check(b, "The quick brown Fox,the abcd1234 (56.78) dc.", new String[] {
+ "quick", "brown", "fox,the", "abcd1234", "(56.78)", "dc." });
+ }
+
+ /**
+ * Test PatternAnalyzer when it is configured with a custom pattern. In this
+ * case, text is tokenized on the comma ","
+ */
+ public void testCustomPattern() throws IOException {
+ // Split on comma, do not lowercase, no stopwords
+ PatternAnalyzer a = new PatternAnalyzer(TEST_VERSION_CURRENT, Pattern.compile(","), false, null);
+ check(a, "Here,Are,some,Comma,separated,words,", new String[] { "Here",
+ "Are", "some", "Comma", "separated", "words" });
+
+ // split on comma, lowercase, english stopwords
+ PatternAnalyzer b = new PatternAnalyzer(TEST_VERSION_CURRENT, Pattern.compile(","), true,
+ StopAnalyzer.ENGLISH_STOP_WORDS_SET);
+ check(b, "Here,Are,some,Comma,separated,words,", new String[] { "here",
+ "some", "comma", "separated", "words" });
+ }
+
+ /**
+ * Test PatternAnalyzer against a large document.
+ */
+ public void testHugeDocument() throws IOException {
+ StringBuilder document = new StringBuilder();
+ // 5000 a's
+ char largeWord[] = new char[5000];
+ Arrays.fill(largeWord, 'a');
+ document.append(largeWord);
+
+ // a space
+ document.append(' ');
+
+ // 2000 b's
+ char largeWord2[] = new char[2000];
+ Arrays.fill(largeWord2, 'b');
+ document.append(largeWord2);
+
+ // Split on whitespace patterns, do not lowercase, no stopwords
+ PatternAnalyzer a = new PatternAnalyzer(TEST_VERSION_CURRENT, PatternAnalyzer.WHITESPACE_PATTERN,
+ false, null);
+ check(a, document.toString(), new String[] { new String(largeWord),
+ new String(largeWord2) });
+ }
+
+ /**
+ * Verify the analyzer analyzes to the expected contents. For PatternAnalyzer,
+ * several methods are verified:
+ * <ul>
+ * <li>Analysis with a normal Reader
+ * <li>Analysis with a FastStringReader
+ * <li>Analysis with a String
+ * </ul>
+ */
+ private void check(PatternAnalyzer analyzer, String document,
+ String expected[]) throws IOException {
+ // ordinary analysis of a Reader
+ assertAnalyzesTo(analyzer, document, expected);
+
+ // analysis with a "FastStringReader"
+ TokenStream ts = analyzer.tokenStream("dummy",
+ new PatternAnalyzer.FastStringReader(document));
+ assertTokenStreamContents(ts, expected);
+
+ // analysis of a String, uses PatternAnalyzer.tokenStream(String, String)
+ TokenStream ts2 = analyzer.tokenStream("dummy", document);
+ assertTokenStreamContents(ts2, expected);
+ }
+}
fnp / pylucene.git / blobdiff