pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestNGramPhraseQuery.java b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestNGramPhraseQuery.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestNGramPhraseQuery.java
@@ -0,0 +1,92 @@
+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 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.junit.AfterClass;
+import org.junit.BeforeClass;
+
+public class TestNGramPhraseQuery extends LuceneTestCase {
+
+  private static IndexReader reader;
+  private static Directory directory;
+
+  @BeforeClass
+  public static void beforeClass() throws Exception {
+    directory = newDirectory();
+    RandomIndexWriter writer = new RandomIndexWriter(random, directory);
+    writer.close();
+    reader = IndexReader.open(directory);
+  }
+
+  @AfterClass
+  public static void afterClass() throws Exception {
+    reader.close();
+    reader = null;
+    directory.close();
+    directory = null;
+  }
+  
+  public void testRewrite() throws Exception {
+    // bi-gram test ABC => AB/BC => AB/BC
+    PhraseQuery pq1 = new NGramPhraseQuery(2);
+    pq1.add(new Term("f", "AB"));
+    pq1.add(new Term("f", "BC"));
+    
+    Query q = pq1.rewrite(reader);
+    assertTrue(q instanceof NGramPhraseQuery);
+    assertSame(pq1, q);
+    pq1 = (NGramPhraseQuery)q;
+    assertArrayEquals(new Term[]{new Term("f", "AB"), new Term("f", "BC")}, pq1.getTerms());
+    assertArrayEquals(new int[]{0, 1}, pq1.getPositions());
+
+    // bi-gram test ABCD => AB/BC/CD => AB//CD
+    PhraseQuery pq2 = new NGramPhraseQuery(2);
+    pq2.add(new Term("f", "AB"));
+    pq2.add(new Term("f", "BC"));
+    pq2.add(new Term("f", "CD"));
+    
+    q = pq2.rewrite(reader);
+    assertTrue(q instanceof PhraseQuery);
+    assertNotSame(pq2, q);
+    pq2 = (PhraseQuery)q;
+    assertArrayEquals(new Term[]{new Term("f", "AB"), new Term("f", "CD")}, pq2.getTerms());
+    assertArrayEquals(new int[]{0, 2}, pq2.getPositions());
+
+    // tri-gram test ABCDEFGH => ABC/BCD/CDE/DEF/EFG/FGH => ABC///DEF//FGH
+    PhraseQuery pq3 = new NGramPhraseQuery(3);
+    pq3.add(new Term("f", "ABC"));
+    pq3.add(new Term("f", "BCD"));
+    pq3.add(new Term("f", "CDE"));
+    pq3.add(new Term("f", "DEF"));
+    pq3.add(new Term("f", "EFG"));
+    pq3.add(new Term("f", "FGH"));
+    
+    q = pq3.rewrite(reader);
+    assertTrue(q instanceof PhraseQuery);
+    assertNotSame(pq3, q);
+    pq3 = (PhraseQuery)q;
+    assertArrayEquals(new Term[]{new Term("f", "ABC"), new Term("f", "DEF"), new Term("f", "FGH")}, pq3.getTerms());
+    assertArrayEquals(new int[]{0, 3, 5}, pq3.getPositions());
+  }
+
+}