pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / test / org / apache / lucene / index / TestSegmentTermEnum.java

diff --git a/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/index/TestSegmentTermEnum.java b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/index/TestSegmentTermEnum.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/index/TestSegmentTermEnum.java
@@ -0,0 +1,132 @@
+package org.apache.lucene.index;
+
+/**
+ * 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 org.apache.lucene.util.LuceneTestCase;
+import org.apache.lucene.analysis.MockAnalyzer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.index.IndexWriterConfig.OpenMode;
+import org.apache.lucene.store.Directory;
+
+
+public class TestSegmentTermEnum extends LuceneTestCase {
+  
+  Directory dir;
+  
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    dir = newDirectory();
+  }
+  
+  @Override
+  public void tearDown() throws Exception {
+    dir.close();
+    super.tearDown();
+  }
+
+  public void testTermEnum() throws IOException {
+    IndexWriter writer = null;
+
+    writer  = new IndexWriter(dir, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random)));
+
+    // ADD 100 documents with term : aaa
+    // add 100 documents with terms: aaa bbb
+    // Therefore, term 'aaa' has document frequency of 200 and term 'bbb' 100
+    for (int i = 0; i < 100; i++) {
+      addDoc(writer, "aaa");
+      addDoc(writer, "aaa bbb");
+    }
+
+    writer.close();
+
+    // verify document frequency of terms in an multi segment index
+    verifyDocFreq();
+
+    // merge segments
+    writer = new IndexWriter(dir, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random)).setOpenMode(OpenMode.APPEND));
+    writer.forceMerge(1);
+    writer.close();
+
+    // verify document frequency of terms in a single segment index
+    verifyDocFreq();
+  }
+
+  public void testPrevTermAtEnd() throws IOException
+  {
+    IndexWriter writer  = new IndexWriter(dir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)));
+    addDoc(writer, "aaa bbb");
+    writer.close();
+    SegmentReader reader = SegmentReader.getOnlySegmentReader(dir);
+    SegmentTermEnum termEnum = (SegmentTermEnum) reader.terms();
+    assertTrue(termEnum.next());
+    assertEquals("aaa", termEnum.term().text());
+    assertTrue(termEnum.next());
+    assertEquals("aaa", termEnum.prev().text());
+    assertEquals("bbb", termEnum.term().text());
+    assertFalse(termEnum.next());
+    assertEquals("bbb", termEnum.prev().text());
+    reader.close();
+  }
+
+  private void verifyDocFreq()
+      throws IOException
+  {
+      IndexReader reader = IndexReader.open(dir, true);
+      TermEnum termEnum = null;
+
+    // create enumeration of all terms
+    termEnum = reader.terms();
+    // go to the first term (aaa)
+    termEnum.next();
+    // assert that term is 'aaa'
+    assertEquals("aaa", termEnum.term().text());
+    assertEquals(200, termEnum.docFreq());
+    // go to the second term (bbb)
+    termEnum.next();
+    // assert that term is 'bbb'
+    assertEquals("bbb", termEnum.term().text());
+    assertEquals(100, termEnum.docFreq());
+
+    termEnum.close();
+
+
+    // create enumeration of terms after term 'aaa', including 'aaa'
+    termEnum = reader.terms(new Term("content", "aaa"));
+    // assert that term is 'aaa'
+    assertEquals("aaa", termEnum.term().text());
+    assertEquals(200, termEnum.docFreq());
+    // go to term 'bbb'
+    termEnum.next();
+    // assert that term is 'bbb'
+    assertEquals("bbb", termEnum.term().text());
+    assertEquals(100, termEnum.docFreq());
+    termEnum.close();
+    reader.close();
+  }
+
+  private void addDoc(IndexWriter writer, String value) throws IOException
+  {
+    Document doc = new Document();
+    doc.add(newField("content", value, Field.Store.NO, Field.Index.ANALYZED));
+    writer.addDocument(doc);
+  }
+}