pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / test / org / apache / lucene / search / TestWildcardRandom.java

diff --git a/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestWildcardRandom.java b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestWildcardRandom.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestWildcardRandom.java
@@ -0,0 +1,139 @@
+package org.apache.lucene.search;
+
+/**
+ * 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.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.text.NumberFormat;
+import java.util.Locale;
+
+import org.apache.lucene.analysis.MockAnalyzer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.index.Term;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.util.LuceneTestCase;
+import org.apache.lucene.util._TestUtil;
+
+/**
+ * Create an index with terms from 000-999.
+ * Generates random wildcards according to patterns,
+ * and validates the correct number of hits are returned.
+ */
+public class TestWildcardRandom extends LuceneTestCase {
+  private IndexSearcher searcher;
+  private IndexReader reader;
+  private Directory dir;
+  
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    dir = newDirectory();
+    RandomIndexWriter writer = new RandomIndexWriter(random, dir,
+        newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random))
+        .setMaxBufferedDocs(_TestUtil.nextInt(random, 50, 1000)));
+    
+    Document doc = new Document();
+    Field bogus1 = newField("bogus1", "", Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS);
+    Field field = newField("field", "", Field.Store.NO, Field.Index.ANALYZED_NO_NORMS);
+    Field bogus2 = newField("zbogus2", "", Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS);
+    doc.add(field);
+    doc.add(bogus1);
+    doc.add(bogus2);
+    
+    NumberFormat df = new DecimalFormat("000", new DecimalFormatSymbols(Locale.ENGLISH));
+    for (int i = 0; i < 1000; i++) {
+      field.setValue(df.format(i));
+      bogus1.setValue(_TestUtil.randomUnicodeString(random, 10));
+      bogus2.setValue(_TestUtil.randomUnicodeString(random, 10));
+      writer.addDocument(doc);
+    }
+    
+    reader = writer.getReader();
+    searcher = newSearcher(reader);
+    writer.close();
+  }
+  
+  private char N() {
+    return (char) (0x30 + random.nextInt(10));
+  }
+  
+  private String fillPattern(String wildcardPattern) {
+    StringBuilder sb = new StringBuilder();
+    for (int i = 0; i < wildcardPattern.length(); i++) {
+      switch(wildcardPattern.charAt(i)) {
+        case 'N':
+          sb.append(N());
+          break;
+        default:
+          sb.append(wildcardPattern.charAt(i));
+      }
+    }
+    return sb.toString();
+  }
+  
+  private void assertPatternHits(String pattern, int numHits) throws Exception {
+    // TODO: run with different rewrites
+    Query wq = new WildcardQuery(new Term("field", fillPattern(pattern)));
+    TopDocs docs = searcher.search(wq, 25);
+    assertEquals("Incorrect hits for pattern: " + pattern, numHits, docs.totalHits);
+  }
+
+  @Override
+  public void tearDown() throws Exception {
+    searcher.close();
+    reader.close();
+    dir.close();
+    super.tearDown();
+  }
+  
+  public void testWildcards() throws Exception {;
+    int num = atLeast(1);
+    for (int i = 0; i < num; i++) {
+      assertPatternHits("NNN", 1);
+      assertPatternHits("?NN", 10);
+      assertPatternHits("N?N", 10);
+      assertPatternHits("NN?", 10);
+    }
+    
+    for (int i = 0; i < num; i++) {
+      assertPatternHits("??N", 100);
+      assertPatternHits("N??", 100);
+      assertPatternHits("???", 1000);
+      
+      assertPatternHits("NN*", 10);
+      assertPatternHits("N*", 100);
+      assertPatternHits("*", 1000);
+      
+      assertPatternHits("*NN", 10);
+      assertPatternHits("*N", 100);
+      
+      assertPatternHits("N*N", 10);
+      
+      // combo of ? and * operators
+      assertPatternHits("?N*", 100);
+      assertPatternHits("N?*", 100);
+      
+      assertPatternHits("*N?", 100);
+      assertPatternHits("*??", 1000);
+      assertPatternHits("*?N", 100);
+    }
+  }
+}