FileDocCategorySizeDatePackage
TestSetNorm.javaAPI DocApache Lucene 2.1.02553Wed Feb 14 10:46:36 GMT 2007org.apache.lucene.search

TestSetNorm

public class TestSetNorm extends TestCase
Document boost unit test.
author
Doug Cutting
version
$Revision: 472959 $

Fields Summary
Constructors Summary
public TestSetNorm(String name)

    super(name);
  
Methods Summary
public voidtestSetNorm()

    RAMDirectory store = new RAMDirectory();
    IndexWriter writer = new IndexWriter(store, new SimpleAnalyzer(), true);

    // add the same document four times
    Fieldable f1 = new Field("field", "word", Field.Store.YES, Field.Index.TOKENIZED);
    Document d1 = new Document();
    d1.add(f1);
    writer.addDocument(d1);
    writer.addDocument(d1);
    writer.addDocument(d1);
    writer.addDocument(d1);
    writer.close();

    // reset the boost of each instance of this document
    IndexReader reader = IndexReader.open(store);
    reader.setNorm(0, "field", 1.0f);
    reader.setNorm(1, "field", 2.0f);
    reader.setNorm(2, "field", 4.0f);
    reader.setNorm(3, "field", 16.0f);
    reader.close();

    // check that searches are ordered by this boost
    final float[] scores = new float[4];

    new IndexSearcher(store).search
      (new TermQuery(new Term("field", "word")),
       new HitCollector() {
         public final void collect(int doc, float score) {
           scores[doc] = score;
         }
       });

    float lastScore = 0.0f;

    for (int i = 0; i < 4; i++) {
      assertTrue(scores[i] > lastScore);
      lastScore = scores[i];
    }