# ====================================================================
# Licensed 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.
# ====================================================================
from unittest import TestCase,main
from lucene import *
class PrefixFilterTestCase(TestCase):
"""
Unit tests ported from Java Lucene
"""
def testPrefixFilter(self):
directory = RAMDirectory()
categories = ["/Computers/Linux",
"/Computers/Mac/One",
"/Computers/Mac/Two",
"/Computers/Windows"]
writer = IndexWriter(directory, WhitespaceAnalyzer(), True,
IndexWriter.MaxFieldLength.LIMITED)
for category in categories:
doc = Document()
doc.add(Field("category", category,
Field.Store.YES, Field.Index.NOT_ANALYZED))
writer.addDocument(doc)
writer.close()
# PrefixFilter combined with ConstantScoreQuery
filter = PrefixFilter(Term("category", "/Computers"))
query = ConstantScoreQuery(filter)
searcher = IndexSearcher(directory, True)
topDocs = searcher.search(query, 50)
self.assertEqual(4, topDocs.totalHits,
"All documents in /Computers category and below")
# test middle of values
filter = PrefixFilter(Term("category", "/Computers/Mac"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(2, topDocs.totalHits, "Two in /Computers/Mac")
# test start of values
filter = PrefixFilter(Term("category", "/Computers/Linux"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(1, topDocs.totalHits, "One in /Computers/Linux")
# test end of values
filter = PrefixFilter(Term("category", "/Computers/Windows"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(1, topDocs.totalHits, "One in /Computers/Windows")
# test non-existant
filter = PrefixFilter(Term("category", "/Computers/ObsoleteOS"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(0, topDocs.totalHits, "no documents")
# test non-existant, before values
filter = PrefixFilter(Term("category", "/Computers/AAA"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(0, topDocs.totalHits, "no documents")
# test non-existant, after values
filter = PrefixFilter(Term("category", "/Computers/ZZZ"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(0, topDocs.totalHits, "no documents")
# test zero-length prefix
filter = PrefixFilter(Term("category", ""))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(4, topDocs.totalHits, "all documents")
# test non-existant field
filter = PrefixFilter(Term("nonexistantfield", "/Computers"))
query = ConstantScoreQuery(filter)
topDocs = searcher.search(query, 50)
self.assertEqual(0, topDocs.totalHits, "no documents")
if __name__ == "__main__":
import sys, lucene
lucene.initVM()
if '-loop' in sys.argv:
sys.argv.remove('-loop')
while True:
try:
main()
except:
pass
else:
main()
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