def test_detect_language_uses_several_ngrams(self):
letter_storage = LetterStorage()
language_detector = LanguageDetector((2, 3), 100)
file_first = open('lab_3/Frank_Baum.txt', 'r', encoding='utf-8')
file_second = open('lab_3/Thomas_Mann.txt', 'r', encoding='utf-8')
file_third = open('lab_3/unknown_Arthur_Conan_Doyle.txt',
'r',
encoding='utf-8')
text_english = tokenize_by_sentence(file_first.read())
text_german = tokenize_by_sentence(file_second.read())
text_unknown = tokenize_by_sentence(file_third.read())
letter_storage.update(text_english)
letter_storage.update(text_german)
letter_storage.update(text_unknown)
encoded_english = encode_corpus(letter_storage, text_english)
encoded_german = encode_corpus(letter_storage, text_german)
encoded_unknown = encode_corpus(letter_storage, text_unknown)
file_first.close()
file_second.close()
file_third.close()
language_detector.new_language(encoded_english, 'english')
language_detector.new_language(encoded_german, 'german')
actual = language_detector.detect_language(encoded_unknown)
self.assertTrue(actual['german'] > actual['english'])
def test_new_language_storage_already_created(self):
letter_storage = LetterStorage()
language_detector = LanguageDetector((3, ), 10)
file = open('lab_3/Thomas_Mann.txt', 'r', encoding='utf-8')
file_unknown = open('lab_3/unknown_Arthur_Conan_Doyle.txt',
'r',
encoding='utf-8')
text = tokenize_by_sentence(file.read())
text_unknown = tokenize_by_sentence(file_unknown.read())
letter_storage.update(text)
letter_storage.update(text_unknown)
encoded_text = encode_corpus(letter_storage, text)
encoded_unknown_text = encode_corpus(letter_storage, text_unknown)
file.close()
file_unknown.close()
language_detector.new_language(encoded_text, 'german')
language_detector.new_language(encoded_unknown_text, 'english')
self.assertTrue(language_detector.n_gram_storages['german'])
self.assertTrue(language_detector.n_gram_storages['english'])
self.assertEqual(type(language_detector.n_gram_storages['german'][3]),
NGramTrie)
self.assertEqual(type(language_detector.n_gram_storages['english'][3]),
NGramTrie)
def test_detect_language_calls_required_method(self, mock):
letter_storage = LetterStorage()
language_detector = LanguageDetector((3, ), 10)
text_to_detect = (((1, 2, 3), ), )
file = open('lab_3/Frank_Baum.txt', 'r', encoding='utf-8')
text = tokenize_by_sentence(file.read())
letter_storage.update(text)
encoded_text = encode_corpus(letter_storage, text)
file.close()
language_detector.new_language(encoded_text, 'english')
language_detector.detect_language(text_to_detect)
self.assertTrue(mock.called)
def test_new_language_creates_several_ngrams(self):
letter_storage = LetterStorage()
language_detector = LanguageDetector((2, 3), 10)
file = open('lab_3/Frank_Baum.txt', 'r', encoding='utf-8')
text = tokenize_by_sentence(file.read())
letter_storage.update(text)
encoded_text = encode_corpus(letter_storage, text)
file.close()
language_detector.new_language(encoded_text, 'english')
self.assertTrue(language_detector.n_gram_storages['english'][2])
self.assertTrue(language_detector.n_gram_storages['english'][3])
def test_new_language_add_existing_language(self):
letter_storage = LetterStorage()
language_detector = LanguageDetector((3, ), 10)
file = open('lab_3/Frank_Baum.txt', 'r', encoding='utf-8')
text = tokenize_by_sentence(file.read())
letter_storage.update(text)
encoded_text = encode_corpus(letter_storage, text)
file.close()
expected = 0
language_detector.new_language(encoded_text, 'german')
actual = language_detector.new_language(encoded_text, 'german')
self.assertEqual(expected, actual)
def test_new_language_incorrect_input(self):
language_detector = LanguageDetector((3, ), 10)
expected = 1
bad_inputs = [[], {}, '', 123, None, True, (None, )]
for bad_input in bad_inputs:
actual = language_detector.new_language(bad_input, 'english')
self.assertEqual(expected, actual)
def test_new_language_incorrect_language_input(self):
language_detector = LanguageDetector((3,), 10)
expected = 1
patches_encoded_text = (((),),)
bad_inputs = [[], {}, (), 123, None, True]
for bad_input in bad_inputs:
actual = language_detector.new_language(patches_encoded_text, bad_input)
self.assertEqual(expected, actual)
text_eng = tokenize_by_sentence(english_file.read())
english_file.close()
german_file.close()
unknown_file.close()
letter_storage = LetterStorage()
letter_storage.update(text_eng)
letter_storage.update(text_ger)
letter_storage.update(text_unk)
eng_encoded = encode_corpus(letter_storage, text_eng)
unk_encoded = encode_corpus(letter_storage, text_unk)
ger_encoded = encode_corpus(letter_storage, text_ger)
language_detector = LanguageDetector((3, 4, 5), 1000)
language_detector.new_language(eng_encoded, 'english')
language_detector.new_language(ger_encoded, 'german')
ngram_unknown = NGramTrie(4)
ngram_unknown.fill_n_grams(unk_encoded)
language_log_probability_dict = language_detector.detect_language(ngram_unknown.n_grams)
if language_log_probability_dict['german'] >\
language_log_probability_dict['english']:
RESULT = 'english'
else:
RESULT = 'german'
print('this is a {} text.'.format(RESULT))
# here goes your function calls
letter_storage = LetterStorage()
language_detector = LanguageDetector((3, ), 100)
file_first = open('lab_3/Frank_Baum.txt', 'r', encoding='utf-8')
file_second = open('lab_3/Thomas_Mann.txt', 'r', encoding='utf-8')
file_third = open('lab_3/unknown_Arthur_Conan_Doyle.txt',
'r',
encoding='utf-8')
text_english = tokenize_by_sentence(file_first.read())
text_german = tokenize_by_sentence(file_second.read())
text_unknown = tokenize_by_sentence(file_third.read())
letter_storage.update(text_english)
letter_storage.update(text_german)
letter_storage.update(text_unknown)
encoded_english = encode_corpus(letter_storage, text_english)
encoded_german = encode_corpus(letter_storage, text_german)
encoded_unknown = encode_corpus(letter_storage, text_unknown)
file_first.close()
file_second.close()
file_third.close()
language_detector.new_language(encoded_english, 'english')
language_detector.new_language(encoded_german, 'german')
actual = language_detector.detect_language(encoded_unknown)
RESULT = actual['german'] > actual['english']
# DO NOT REMOVE NEXT LINE - KEEP IT INTENTIONALLY LAST
assert RESULT == 1, ''