test/test_DocBoost.py

   1 # ====================================================================
   2 #   Licensed under the Apache License, Version 2.0 (the "License");
   3 #   you may not use this file except in compliance with the License.
   4 #   You may obtain a copy of the License at
   5 #
   6 #       http://www.apache.org/licenses/LICENSE-2.0
   7 #
   8 #   Unless required by applicable law or agreed to in writing, software
   9 #   distributed under the License is distributed on an "AS IS" BASIS,
  10 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11 #   See the License for the specific language governing permissions and
  12 #   limitations under the License.
  13 # ====================================================================
  14
  15 from unittest import TestCase, main
  16 from lucene import *
  17
  18
  19 class DocBoostTestCase(TestCase):
  20     """
  21     Unit tests ported from Java Lucene
  22     """
  23
  24     def testDocBoost(self):
  25
  26         store = RAMDirectory()
  27         writer = IndexWriter(store, SimpleAnalyzer(), True,
  28                              IndexWriter.MaxFieldLength.LIMITED)
  29
  30         f1 = Field("field", "word", Field.Store.YES, Field.Index.ANALYZED)
  31         f2 = Field("field", "word", Field.Store.YES, Field.Index.ANALYZED)
  32         f2.setBoost(2.0)
  33
  34         d1 = Document()
  35         d2 = Document()
  36         d3 = Document()
  37         d4 = Document()
  38         d3.setBoost(3.0)
  39         d4.setBoost(2.0)
  40
  41         d1.add(f1)                                 # boost = 1
  42         d2.add(f2)                                 # boost = 2
  43         d3.add(f1)                                 # boost = 3
  44         d4.add(f2)                                 # boost = 4
  45
  46         writer.addDocument(d1)
  47         writer.addDocument(d2)
  48         writer.addDocument(d3)
  49         writer.addDocument(d4)
  50         writer.optimize()
  51         writer.close()
  52
  53         scores = [0.0] * 4
  54
  55         class collector(PythonCollector):
  56             def __init__(_self, scores):
  57                 super(collector, _self).__init__()
  58                 _self.scores = scores
  59                 _self.base = 0
  60             def collect(_self, doc, score):
  61                 _self.scores[doc + _self.base] = score
  62             def setNextReader(_self, reader, docBase):
  63                 _self.base = docBase
  64             def acceptsDocsOutOfOrder(_self):
  65                 return True
  66
  67         IndexSearcher(store, True).search(TermQuery(Term("field", "word")),
  68                                           collector(scores))
  69
  70         lastScore = 0.0
  71         for score in scores:
  72             self.assert_(score > lastScore)
  73             lastScore = score
  74
  75
  76 if __name__ == "__main__":
  77     import sys, lucene
  78     lucene.initVM()
  79     if '-loop' in sys.argv:
  80         sys.argv.remove('-loop')
  81         while True:
  82             try:
  83                 main()
  84             except:
  85                 pass
  86     else:
  87          main()