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test_lexicon.py
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/
test_lexicon.py
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##############################################################################
#
# Copyright (c) 2002 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
"""Lexicon tests
"""
import unittest
class LexiconTests(unittest.TestCase):
def _getTargetClass(self):
from zope.index.text.lexicon import Lexicon
return Lexicon
def _makeOne(self, *pipeline):
from zope.index.text.lexicon import Splitter
pipeline = (Splitter(),) + pipeline
return self._getTargetClass()(*pipeline)
def test_class_conforms_to_ILexicon(self):
from zope.interface.verify import verifyClass
from zope.index.text.interfaces import ILexicon
verifyClass(ILexicon, self._getTargetClass())
def test_instance_conforms_to_ILexicon(self):
from zope.interface.verify import verifyObject
from zope.index.text.interfaces import ILexicon
verifyObject(ILexicon, self._makeOne())
def test_empty(self):
lexicon = self._makeOne()
self.assertEqual(len(lexicon.words()), 0)
self.assertEqual(len(lexicon.wids()), 0)
self.assertEqual(len(lexicon.items()), 0)
self.assertEqual(lexicon.wordCount(), 0)
def test_wordCount_legacy_instance_no_write_on_read(self):
from BTrees.Length import Length
lexicon = self._makeOne()
# Simulate old instance, which didn't have Length attr
del lexicon.wordCount
self.assertEqual(lexicon.wordCount(), 0)
# No write-on-read!
self.assertFalse(isinstance(lexicon.wordCount, Length))
def test_sourceToWordIds_empty_string(self):
lexicon = self._makeOne()
wids = lexicon.sourceToWordIds('')
self.assertEqual(wids, [])
def test_sourceToWordIds_none(self):
# See LP #598776
lexicon = self._makeOne()
wids = lexicon.sourceToWordIds(None)
self.assertEqual(wids, [])
def test_sourceToWordIds(self):
lexicon = self._makeOne()
wids = lexicon.sourceToWordIds('cats and dogs')
self.assertEqual(wids, [1, 2, 3])
self.assertEqual(lexicon.get_word(1), 'cats')
self.assertEqual(lexicon.get_wid('cats'), 1)
def test_sourceToWordIds_promotes_wordCount_attr(self):
from BTrees.Length import Length
lexicon = self._makeOne()
# Simulate old instance, which didn't have Length attr
del lexicon.wordCount
wids = lexicon.sourceToWordIds('cats and dogs')
self.assertEqual(wids, [1, 2, 3])
self.assertEqual(lexicon.wordCount(), 3)
self.assertTrue(isinstance(lexicon.wordCount, Length))
def test_termToWordIds_hit(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs')
wids = lexicon.termToWordIds('dogs')
self.assertEqual(wids, [3])
def test_termToWordIds_miss(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs')
wids = lexicon.termToWordIds('boxes')
self.assertEqual(wids, [0])
def test_termToWordIds_w_extra_pipeline_element(self):
lexicon = self._makeOne(StupidPipelineElement('dogs', 'fish'))
lexicon.sourceToWordIds('cats and dogs')
wids = lexicon.termToWordIds('fish')
self.assertEqual(wids, [3])
def test_termToWordIds_w_case_normalizer(self):
from zope.index.text.lexicon import CaseNormalizer
lexicon = self._makeOne(CaseNormalizer())
lexicon.sourceToWordIds('CATS and dogs')
wids = lexicon.termToWordIds('cats and dogs')
self.assertEqual(wids, [1, 2, 3])
def test_termToWordIds_wo_case_normalizer(self):
lexicon = self._makeOne()
wids = lexicon.sourceToWordIds('CATS and dogs')
wids = lexicon.termToWordIds('cats and dogs')
self.assertEqual(wids, [0, 2, 3])
def test_termToWordIds_w_two_extra_pipeline_elements(self):
lexicon = self._makeOne(StupidPipelineElement('cats', 'fish'),
WackyReversePipelineElement('fish'),
)
lexicon.sourceToWordIds('cats and dogs')
wids = lexicon.termToWordIds('hsif')
self.assertEqual(wids, [1])
def test_termToWordIds_w_three_extra_pipeline_elements(self):
lexicon = self._makeOne(StopWordPipelineElement({'and':1}),
StupidPipelineElement('dogs', 'fish'),
WackyReversePipelineElement('fish'),
)
wids = lexicon.sourceToWordIds('cats and dogs')
wids = lexicon.termToWordIds('hsif')
self.assertEqual(wids, [2])
def test_parseTerms_tuple(self):
TERMS = ('a', 'b*c', 'de?f')
lexicon = self._makeOne()
self.assertEqual(lexicon.parseTerms(TERMS), list(TERMS))
def test_parseTerms_list(self):
TERMS = ('a', 'b*c', 'de?f')
lexicon = self._makeOne()
self.assertEqual(lexicon.parseTerms(TERMS), list(TERMS))
def test_parseTerms_empty_string(self):
lexicon = self._makeOne()
self.assertEqual(lexicon.parseTerms('a b*c de?f'),
['a', 'b*c', 'de?f'])
def test_parseTerms_nonempty_string(self):
lexicon = self._makeOne()
self.assertEqual(lexicon.parseTerms(''), [])
def test_isGlob_empty(self):
lexicon = self._makeOne()
self.assertFalse(lexicon.isGlob(''))
def test_isGlob_miss(self):
lexicon = self._makeOne()
self.assertFalse(lexicon.isGlob('abc'))
def test_isGlob_question_mark(self):
lexicon = self._makeOne()
self.assertTrue(lexicon.isGlob('a?c'))
def test_isGlob_asterisk(self):
lexicon = self._makeOne()
self.assertTrue(lexicon.isGlob('abc*'))
def test_globToWordIds_invalid_pattern(self):
from zope.index.text.parsetree import QueryError
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs')
self.assertRaises(QueryError, lexicon.globToWordIds, '*s')
def test_globToWordIds_simple_pattern(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs are enemies')
self.assertEqual(lexicon.globToWordIds('a*'), [2, 4])
def test_globToWordIds_simple_pattern2(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs are enemies')
self.assertEqual(lexicon.globToWordIds('a?e'), [4])
def test_globToWordIds_prefix(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs are enemies')
self.assertEqual(lexicon.globToWordIds('are'), [4])
def test_getWordIdCreate_new(self):
lexicon = self._makeOne()
wid = lexicon._getWordIdCreate('nonesuch')
self.assertEqual(wid, 1)
self.assertEqual(lexicon.get_word(1), 'nonesuch')
self.assertEqual(lexicon.get_wid('nonesuch'), 1)
def test_getWordIdCreate_extant(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs are enemies')
wid = lexicon._getWordIdCreate('cats')
self.assertEqual(wid, 1)
self.assertEqual(lexicon.get_word(1), 'cats')
self.assertEqual(lexicon.get_wid('cats'), 1)
def test__new_wid_recovers_from_damaged_length(self):
lexicon = self._makeOne()
lexicon.sourceToWordIds('cats and dogs')
lexicon.wordCount.set(0)
wid = lexicon._new_wid()
self.assertEqual(wid, 4)
self.assertEqual(lexicon.wordCount(), 4)
class SplitterTests(unittest.TestCase):
def _getTargetClass(self):
from zope.index.text.lexicon import Splitter
return Splitter
def _makeOne(self):
return self._getTargetClass()()
def test_class_conforms_to_ISplitter(self):
from zope.interface.verify import verifyClass
from zope.index.text.interfaces import ISplitter
verifyClass(ISplitter, self._getTargetClass())
def test_instance_conforms_to_ISplitter(self):
from zope.interface.verify import verifyObject
from zope.index.text.interfaces import ISplitter
verifyObject(ISplitter, self._makeOne())
def test_process_empty_string(self):
splitter = self._makeOne()
self.assertEqual(splitter.process(['']), [])
def test_process_simple(self):
splitter = self._makeOne()
self.assertEqual(splitter.process(['abc def']), ['abc', 'def'])
def test_process_w_locale_awareness(self):
import locale
import sys
old_locale = locale.setlocale(locale.LC_ALL)
# set German locale
try:
locale_string = 'de_DE.ISO8859-1' if sys.platform != 'win32' else 'German_Germany.1252'
locale.setlocale(locale.LC_ALL, locale_string)
except locale.Error: # pragma: no cover
self.skipTest("d._DE.ISO8859-1 locale is not available")
self.addCleanup(locale.setlocale, locale.LC_ALL, old_locale)
expected = ['m\xfclltonne', 'waschb\xe4r',
'beh\xf6rde', '\xfcberflieger']
splitter = self._makeOne()
self.assertEqual(splitter.process([' '.join(expected)]), expected)
def test_process_w_glob(self):
splitter = self._makeOne()
self.assertEqual(splitter.process(['abc?def hij*klm nop* qrs?']),
['abc', 'def', 'hij', 'klm', 'nop', 'qrs'])
def test_processGlob_empty_string(self):
splitter = self._makeOne()
self.assertEqual(splitter.processGlob(['']), [])
def test_processGlob_simple(self):
splitter = self._makeOne()
self.assertEqual(splitter.processGlob(['abc def']), ['abc', 'def'])
def test_processGlob_w_glob(self):
splitter = self._makeOne()
self.assertEqual(splitter.processGlob(['abc?def hij*klm nop* qrs?']),
['abc?def', 'hij*klm', 'nop*', 'qrs?'])
class CaseNormalizerTests(unittest.TestCase):
def _getTargetClass(self):
from zope.index.text.lexicon import CaseNormalizer
return CaseNormalizer
def _makeOne(self):
return self._getTargetClass()()
def test_class_conforms_to_IPipelineElement(self):
from zope.interface.verify import verifyClass
from zope.index.text.interfaces import IPipelineElement
verifyClass(IPipelineElement, self._getTargetClass())
def test_instance_conforms_to_IPipelineElement(self):
from zope.interface.verify import verifyObject
from zope.index.text.interfaces import IPipelineElement
verifyObject(IPipelineElement, self._makeOne())
def test_process_empty(self):
cn = self._makeOne()
self.assertEqual(cn.process([]), [])
def test_process_nonempty(self):
cn = self._makeOne()
self.assertEqual(cn.process(['ABC Def']), ['abc def'])
class StopWordRemoverTests(unittest.TestCase):
def _getTargetClass(self):
from zope.index.text.lexicon import StopWordRemover
return StopWordRemover
def _makeOne(self):
return self._getTargetClass()()
def test_class_conforms_to_IPipelineElement(self):
from zope.interface.verify import verifyClass
from zope.index.text.interfaces import IPipelineElement
verifyClass(IPipelineElement, self._getTargetClass())
def test_instance_conforms_to_IPipelineElement(self):
from zope.interface.verify import verifyObject
from zope.index.text.interfaces import IPipelineElement
verifyObject(IPipelineElement, self._makeOne())
def test_process_empty(self):
cn = self._makeOne()
self.assertEqual(cn.process([]), [])
def test_process_nonempty(self):
QUOTE = 'The end of government is justice'
cn = self._makeOne()
self.assertEqual(cn.process(QUOTE.lower().split()),
['end', 'government', 'justice'])
class StopWordAndSingleCharRemoverTests(unittest.TestCase):
def _getTargetClass(self):
from zope.index.text.lexicon import StopWordAndSingleCharRemover
return StopWordAndSingleCharRemover
def _makeOne(self):
return self._getTargetClass()()
def test_class_conforms_to_IPipelineElement(self):
from zope.interface.verify import verifyClass
from zope.index.text.interfaces import IPipelineElement
verifyClass(IPipelineElement, self._getTargetClass())
def test_instance_conforms_to_IPipelineElement(self):
from zope.interface.verify import verifyObject
from zope.index.text.interfaces import IPipelineElement
verifyObject(IPipelineElement, self._makeOne())
def test_process_empty(self):
cn = self._makeOne()
self.assertEqual(cn.process([]), [])
def test_process_nonempty(self):
QUOTE = 'The end of government is justice z x q'
cn = self._makeOne()
self.assertEqual(cn.process(QUOTE.lower().split()),
['end', 'government', 'justice'])
class StupidPipelineElement(object):
def __init__(self, fromword, toword):
self.__fromword = fromword
self.__toword = toword
def process(self, seq):
res = []
for term in seq:
if term == self.__fromword:
res.append(self.__toword)
else:
res.append(term)
return res
class WackyReversePipelineElement(object):
def __init__(self, revword):
self.__revword = revword
def process(self, seq):
res = []
for term in seq:
if term == self.__revword:
x = list(term)
x.reverse()
res.append(''.join(x))
else:
res.append(term)
return res
class StopWordPipelineElement(object):
def __init__(self, stopdict):
self.__stopdict = stopdict
def process(self, seq):
res = []
for term in seq:
if self.__stopdict.get(term):
continue
else:
res.append(term)
return res