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49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Corpus View Regression Tests
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"""
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import unittest
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import nltk.data
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from nltk.corpus.reader.util import (
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StreamBackedCorpusView,
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read_whitespace_block,
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read_line_block,
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)
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class TestCorpusViews(unittest.TestCase):
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linetok = nltk.LineTokenizer(blanklines='keep')
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names = [
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'corpora/inaugural/README', # A very short file (160 chars)
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'corpora/inaugural/1793-Washington.txt', # A relatively short file (791 chars)
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'corpora/inaugural/1909-Taft.txt', # A longer file (32k chars)
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]
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def data(self):
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for name in self.names:
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f = nltk.data.find(name)
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with f.open() as fp:
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file_data = fp.read().decode('utf8')
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yield f, file_data
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def test_correct_values(self):
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# Check that corpus views produce the correct sequence of values.
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for f, file_data in self.data():
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v = StreamBackedCorpusView(f, read_whitespace_block)
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self.assertEqual(list(v), file_data.split())
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v = StreamBackedCorpusView(f, read_line_block)
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self.assertEqual(list(v), self.linetok.tokenize(file_data))
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def test_correct_length(self):
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# Check that the corpus views report the correct lengths:
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for f, file_data in self.data():
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v = StreamBackedCorpusView(f, read_whitespace_block)
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self.assertEqual(len(v), len(file_data.split()))
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v = StreamBackedCorpusView(f, read_line_block)
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self.assertEqual(len(v), len(self.linetok.tokenize(file_data)))
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