def test_overlapping(self):
cw_automat = fast_practical_multi_string_matching_build(
['he', 'she', 'his', 'her', 'hers'])
found = list(
fast_practical_multi_string_matching('eshers', 6, cw_automat))
correct = [('she', 1), ('he', 2), ('her', 2), ('hers', 2)]
self.assertListEqual(found, correct)
def test_non_overlapping(self):
cw_automat = fast_practical_multi_string_matching_build(
['aa', 'bcc', 'bcab'])
found = list(
fast_practical_multi_string_matching('aabccabcab', 10, cw_automat))
correct = [('aa', 0), ('bcc', 2), ('bcab', 6)]
self.assertListEqual(found, correct)
def test_small(self):
cw_automat = fast_practical_multi_string_matching_build(
['cacbaa', 'acb', 'aba', 'acbab', 'ccbab'])
found = list(
fast_practical_multi_string_matching('dacbaababababa', 14,
cw_automat))
correct = [('acb', 1), ('aba', 5), ('aba', 7), ('aba', 9), ('aba', 11)]
self.assertListEqual(found, correct)
def test_random_small(self):
n, m, A = 100, 25, ['a', 'b', 'c']
for _ in range(100):
t = random_word(n, A)
patterns = {(random_word(randint(2, 5), A)) for _ in range(m)}
cw_automat = fast_practical_multi_string_matching_build(patterns)
expected = set()
for p in patterns:
starts = brute_force(t, p, n, len(p) - 1)
indices = [(p, i) for i in starts]
expected.union(set(indices))
found = set(
fast_practical_multi_string_matching(t[1::], n, cw_automat))
self.assertSetEqual(expected, found)
def test_no_match(self):
cw_automat = fast_practical_multi_string_matching_build(['bb', 'abba'])
found = list(
fast_practical_multi_string_matching('abababab', 8, cw_automat))
self.assertFalse(list(found))
def test_pessimistic(self):
cw_automat = fast_practical_multi_string_matching_build(
[i * 'a' for i in range(1, 6)])
found = list(
fast_practical_multi_string_matching('a' * 20, 20, cw_automat))
self.assertEqual(len(found), 20 + 19 + 18 + 17 + 16)
def test_single_keyword(self):
cw_automat = fast_practical_multi_string_matching_build(['abc'])
found = list(
fast_practical_multi_string_matching('aabccabcab', 10, cw_automat))
correct = [('abc', 1), ('abc', 5)]
self.assertListEqual(found, correct)