pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/index/TestUniqueTermCount.java b/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/index/TestUniqueTermCount.java
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+++ b/lucene-java-3.5.0/lucene/backwards/src/test/org/apache/lucene/index/TestUniqueTermCount.java
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+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.util.ArrayList;
+import java.util.HashSet;
+
+import org.apache.lucene.analysis.MockAnalyzer;
+import org.apache.lucene.analysis.MockTokenizer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.search.DefaultSimilarity;
+import org.apache.lucene.search.Similarity;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.util.LuceneTestCase;
+import org.apache.lucene.util._TestUtil;
+
+/**
+ * Tests the uniqueTermCount statistic in FieldInvertState
+ */
+public class TestUniqueTermCount extends LuceneTestCase { 
+  Directory dir;
+  IndexReader reader;
+  /* expected uniqueTermCount values for our documents */
+  ArrayList<Integer> expected = new ArrayList<Integer>();
+  
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    dir = newDirectory();
+    IndexWriterConfig config = newIndexWriterConfig(TEST_VERSION_CURRENT, 
+                                                    new MockAnalyzer(random, MockTokenizer.SIMPLE, true)).setMergePolicy(newLogMergePolicy());
+    config.setSimilarity(new TestSimilarity());
+    RandomIndexWriter writer = new RandomIndexWriter(random, dir, config);
+    Document doc = new Document();
+    Field foo = newField("foo", "", Field.Store.NO, Field.Index.ANALYZED);
+    doc.add(foo);
+    for (int i = 0; i < 100; i++) {
+      foo.setValue(addValue());
+      writer.addDocument(doc);
+    }
+    reader = writer.getReader();
+    writer.close();
+  }
+  
+  @Override
+  public void tearDown() throws Exception {
+    reader.close();
+    dir.close();
+    super.tearDown();
+  }
+  
+  public void test() throws Exception {
+    byte fooNorms[] = reader.norms("foo");
+    for (int i = 0; i < reader.maxDoc(); i++)
+      assertEquals(expected.get(i).intValue(), fooNorms[i] & 0xff);
+  }
+
+  /**
+   * Makes a bunch of single-char tokens (the max # unique terms will at most be 26).
+   * puts the # unique terms into expected, to be checked against the norm.
+   */
+  private String addValue() {
+    StringBuilder sb = new StringBuilder();
+    HashSet<String> terms = new HashSet<String>();
+    int num = _TestUtil.nextInt(random, 0, 255);
+    for (int i = 0; i < num; i++) {
+      sb.append(' ');
+      char term = (char) _TestUtil.nextInt(random, 'a', 'z');
+      sb.append(term);
+      terms.add("" + term);
+    }
+    expected.add(terms.size());
+    return sb.toString();
+  }
+  
+  /**
+   * Simple similarity that encodes maxTermFrequency directly as a byte
+   */
+  class TestSimilarity extends DefaultSimilarity {
+
+    @Override
+    public byte encodeNormValue(float f) {
+      return (byte) f;
+    }
+
+    @Override
+    public float computeNorm(String field, FieldInvertState state) {
+      return (float) state.getUniqueTermCount();
+    }
+  }
+}