mirror of
https://github.com/rspeer/wordfreq.git
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224 lines
7.1 KiB
Python
224 lines
7.1 KiB
Python
from wordfreq import (
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word_frequency, available_languages, cB_to_freq,
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top_n_list, random_words, random_ascii_words, tokenize
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)
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from nose.tools import (
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eq_, assert_almost_equal, assert_greater, raises
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)
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def test_freq_examples():
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# Stopwords are most common in the correct language
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assert_greater(word_frequency('the', 'en'),
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word_frequency('de', 'en'))
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assert_greater(word_frequency('de', 'es'),
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word_frequency('the', 'es'))
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# To test the reasonableness of the Twitter list, we want to look up a
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# common word representing laughter in each language. The default for
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# languages not listed here is 'haha'.
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LAUGHTER_WORDS = {
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'en': 'lol',
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'hi': 'lol',
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'ru': 'лол',
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'zh': '笑',
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'ja': '笑',
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'ar': 'ﻪﻬﻬﻬﻫ',
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'ca': 'jaja',
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'es': 'jaja',
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'fr': 'ptdr',
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'pt': 'kkkk',
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'he': 'חחח',
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'bg': 'xaxa',
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}
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def test_languages():
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# Make sure the number of available languages doesn't decrease
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avail = available_languages()
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assert_greater(len(avail), 26)
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# Look up the digit '2' in the main word list for each language
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for lang in avail:
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assert_greater(word_frequency('2', lang), 0, lang)
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# Make up a weirdly verbose language code and make sure
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# we still get it
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new_lang_code = '%s-001-x-fake-extension' % lang.upper()
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assert_greater(word_frequency('2', new_lang_code), 0, new_lang_code)
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def test_twitter():
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avail = available_languages('twitter')
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assert_greater(len(avail), 15)
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for lang in avail:
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assert_greater(word_frequency('rt', lang, 'twitter'),
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word_frequency('rt', lang, 'combined'))
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text = LAUGHTER_WORDS.get(lang, 'haha')
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assert_greater(word_frequency(text, lang, wordlist='twitter'), 0, (text, lang))
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def test_minimums():
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eq_(word_frequency('esquivalience', 'en'), 0)
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eq_(word_frequency('esquivalience', 'en', minimum=1e-6), 1e-6)
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eq_(word_frequency('the', 'en', minimum=1), 1)
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def test_most_common_words():
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# If something causes the most common words in well-supported languages to
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# change, we should know.
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def get_most_common(lang):
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"""
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Return the single most common word in the language.
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"""
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return top_n_list(lang, 1)[0]
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eq_(get_most_common('ar'), 'من')
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eq_(get_most_common('de'), 'die')
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eq_(get_most_common('en'), 'the')
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eq_(get_most_common('es'), 'de')
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eq_(get_most_common('fr'), 'de')
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eq_(get_most_common('it'), 'di')
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eq_(get_most_common('ja'), 'の')
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eq_(get_most_common('nl'), 'de')
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eq_(get_most_common('pt'), 'de')
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eq_(get_most_common('ru'), 'в')
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eq_(get_most_common('tr'), 'bir')
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eq_(get_most_common('zh'), '的')
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def test_language_matching():
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freq = word_frequency('的', 'zh')
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eq_(word_frequency('的', 'zh-TW'), freq)
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eq_(word_frequency('的', 'zh-CN'), freq)
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eq_(word_frequency('的', 'zh-Hant'), freq)
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eq_(word_frequency('的', 'zh-Hans'), freq)
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eq_(word_frequency('的', 'yue-HK'), freq)
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eq_(word_frequency('的', 'cmn'), freq)
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def test_cB_conversion():
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eq_(cB_to_freq(0), 1.)
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assert_almost_equal(cB_to_freq(-100), 0.1)
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assert_almost_equal(cB_to_freq(-600), 1e-6)
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@raises(ValueError)
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def test_failed_cB_conversion():
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cB_to_freq(1)
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def test_tokenization():
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# We preserve apostrophes within words, so "can't" is a single word in the
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# data
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eq_(tokenize("I don't split at apostrophes, you see.", 'en'),
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['i', "don't", 'split', 'at', 'apostrophes', 'you', 'see'])
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eq_(tokenize("I don't split at apostrophes, you see.", 'en', include_punctuation=True),
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['i', "don't", 'split', 'at', 'apostrophes', ',', 'you', 'see', '.'])
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# Certain punctuation does not inherently split a word.
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eq_(tokenize("Anything is possible at zombo.com", 'en'),
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['anything', 'is', 'possible', 'at', 'zombo.com'])
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# Splits occur after symbols, and at splitting punctuation such as hyphens.
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eq_(tokenize('😂test', 'en'), ['😂', 'test'])
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eq_(tokenize("flip-flop", 'en'), ['flip', 'flop'])
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eq_(tokenize('this text has... punctuation :)', 'en', include_punctuation=True),
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['this', 'text', 'has', '...', 'punctuation', ':)'])
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def test_casefolding():
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eq_(tokenize('WEISS', 'de'), ['weiss'])
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eq_(tokenize('weiß', 'de'), ['weiss'])
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eq_(tokenize('İstanbul', 'tr'), ['istanbul'])
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eq_(tokenize('SIKISINCA', 'tr'), ['sıkısınca'])
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def test_phrase_freq():
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ff = word_frequency("flip-flop", 'en')
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assert_greater(ff, 0)
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assert_almost_equal(
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1.0 / ff,
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1.0 / word_frequency('flip', 'en') + 1.0 / word_frequency('flop', 'en')
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)
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def test_not_really_random():
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# If your xkcd-style password comes out like this, maybe you shouldn't
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# use it
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eq_(random_words(nwords=4, lang='en', bits_per_word=0),
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'the the the the')
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# This not only tests random_ascii_words, it makes sure we didn't end
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# up with 'eos' as a very common Japanese word
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eq_(random_ascii_words(nwords=4, lang='ja', bits_per_word=0),
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'1 1 1 1')
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@raises(ValueError)
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def test_not_enough_ascii():
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random_ascii_words(lang='zh', bits_per_word=14)
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def test_arabic():
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# Remove tatweels
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eq_(
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tokenize('متــــــــعب', 'ar'),
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['متعب']
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)
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# Remove combining marks
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eq_(
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tokenize('حَرَكَات', 'ar'),
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['حركات']
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)
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eq_(
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tokenize('\ufefb', 'ar'), # An Arabic ligature...
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['\u0644\u0627'] # ...that is affected by NFKC normalization
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)
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def test_ideographic_fallback():
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# Try tokenizing Chinese text as English -- it should remain stuck together.
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eq_(tokenize('中国文字', 'en'), ['中国文字'])
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# When Japanese is tagged with the wrong language, it will be split
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# at script boundaries.
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ja_text = 'ひらがなカタカナromaji'
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eq_(
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tokenize(ja_text, 'en'),
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['ひらがな', 'カタカナ', 'romaji']
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)
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def test_other_languages():
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# Test that we leave Thai letters stuck together. If we had better Thai support,
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# we would actually split this into a three-word phrase.
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eq_(tokenize('การเล่นดนตรี', 'th'), ['การเล่นดนตรี'])
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eq_(tokenize('"การเล่นดนตรี" means "playing music"', 'en'),
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['การเล่นดนตรี', 'means', 'playing', 'music'])
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# Test Khmer, a script similar to Thai
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eq_(tokenize('សូមស្វាគមន៍', 'km'), ['សូមស្វាគមន៍'])
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# Test Hindi -- tokens split where there are spaces, and not where there aren't
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eq_(tokenize('हिन्दी विक्षनरी', 'hi'), ['हिन्दी', 'विक्षनरी'])
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# Remove vowel points in Hebrew
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eq_(tokenize('דֻּגְמָה', 'he'), ['דגמה'])
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# Deal with commas, cedillas, and I's in Turkish
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eq_(tokenize('kișinin', 'tr'), ['kişinin'])
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eq_(tokenize('KİȘİNİN', 'tr'), ['kişinin'])
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# Deal with cedillas that should be commas-below in Romanian
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eq_(tokenize('acelaşi', 'ro'), ['același'])
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eq_(tokenize('ACELAŞI', 'ro'), ['același'])
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