X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/analysis/TestStopFilter.java

diff --git a/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/analysis/TestStopFilter.java b/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/analysis/TestStopFilter.java
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+++ b/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/analysis/TestStopFilter.java
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+package org.apache.lucene.analysis;
+
+/**
+ * Copyright 2005 The Apache Software Foundation
+ *
+ * Licensed 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 org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+import org.apache.lucene.util.English;
+import org.apache.lucene.util.Version;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Set;
+import java.util.HashSet;
+
+import org.apache.lucene.analysis.BaseTokenStreamTestCase;
+import org.apache.lucene.analysis.MockTokenizer;
+import org.apache.lucene.analysis.TokenStream;
+
+public class TestStopFilter extends BaseTokenStreamTestCase {
+  
+  // other StopFilter functionality is already tested by TestStopAnalyzer
+
+  public void testExactCase() throws IOException {
+    StringReader reader = new StringReader("Now is The Time");
+    Set<String> stopWords = new HashSet<String>(Arrays.asList("is", "the", "Time"));
+    TokenStream stream = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopWords, false);
+    assertTokenStreamContents(stream, new String[] { "Now", "The" });
+  }
+
+  public void testIgnoreCase() throws IOException {
+    StringReader reader = new StringReader("Now is The Time");
+    Set<Object> stopWords = new HashSet<Object>(Arrays.asList( "is", "the", "Time" ));
+    TokenStream stream = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopWords, true);
+    assertTokenStreamContents(stream, new String[] { "Now" });
+  }
+
+  public void testStopFilt() throws IOException {
+    StringReader reader = new StringReader("Now is The Time");
+    String[] stopWords = new String[] { "is", "the", "Time" };
+    Set<Object> stopSet = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords);
+    TokenStream stream = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet);
+    assertTokenStreamContents(stream, new String[] { "Now", "The" });
+  }
+
+  /**
+   * Test Position increments applied by StopFilter with and without enabling this option.
+   */
+  public void testStopPositons() throws IOException {
+    StringBuilder sb = new StringBuilder();
+    ArrayList<String> a = new ArrayList<String>();
+    for (int i=0; i<20; i++) {
+      String w = English.intToEnglish(i).trim();
+      sb.append(w).append(" ");
+      if (i%3 != 0) a.add(w);
+    }
+    log(sb.toString());
+    String stopWords[] = a.toArray(new String[0]);
+    for (int i=0; i<a.size(); i++) log("Stop: "+stopWords[i]);
+    Set<Object> stopSet = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords);
+    // with increments
+    StringReader reader = new StringReader(sb.toString());
+    StopFilter stpf = new StopFilter(Version.LUCENE_24, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet);
+    doTestStopPositons(stpf,true);
+    // without increments
+    reader = new StringReader(sb.toString());
+    stpf = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet);
+    doTestStopPositons(stpf,false);
+    // with increments, concatenating two stop filters
+    ArrayList<String> a0 = new ArrayList<String>();
+    ArrayList<String> a1 = new ArrayList<String>();
+    for (int i=0; i<a.size(); i++) {
+      if (i%2==0) { 
+        a0.add(a.get(i));
+      } else {
+        a1.add(a.get(i));
+      }
+    }
+    String stopWords0[] =  a0.toArray(new String[0]);
+    for (int i=0; i<a0.size(); i++) log("Stop0: "+stopWords0[i]);
+    String stopWords1[] =  a1.toArray(new String[0]);
+    for (int i=0; i<a1.size(); i++) log("Stop1: "+stopWords1[i]);
+    Set<Object> stopSet0 = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords0);
+    Set<Object> stopSet1 = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords1);
+    reader = new StringReader(sb.toString());
+    StopFilter stpf0 = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet0); // first part of the set
+    stpf0.setEnablePositionIncrements(true);
+    StopFilter stpf01 = new StopFilter(TEST_VERSION_CURRENT, stpf0, stopSet1); // two stop filters concatenated!
+    doTestStopPositons(stpf01,true);
+  }
+  
+  private void doTestStopPositons(StopFilter stpf, boolean enableIcrements) throws IOException {
+    log("---> test with enable-increments-"+(enableIcrements?"enabled":"disabled"));
+    stpf.setEnablePositionIncrements(enableIcrements);
+    CharTermAttribute termAtt = stpf.getAttribute(CharTermAttribute.class);
+    PositionIncrementAttribute posIncrAtt = stpf.getAttribute(PositionIncrementAttribute.class);
+    stpf.reset();
+    for (int i=0; i<20; i+=3) {
+      assertTrue(stpf.incrementToken());
+      log("Token "+i+": "+stpf);
+      String w = English.intToEnglish(i).trim();
+      assertEquals("expecting token "+i+" to be "+w,w,termAtt.toString());
+      assertEquals("all but first token must have position increment of 3",enableIcrements?(i==0?1:3):1,posIncrAtt.getPositionIncrement());
+    }
+    assertFalse(stpf.incrementToken());
+    stpf.end();
+    stpf.close();
+  }
+  
+  // print debug info depending on VERBOSE
+  private static void log(String s) {
+    if (VERBOSE) {
+      System.out.println(s);
+    }
+  }
+}