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# external
import pytest
# project
import textdistance
ALG = textdistance.LCSStr
@pytest.mark.parametrize('left, right, expected', [
# prefix
('ab', 'abcd', 'ab'),
('abcd', 'ab', 'ab'),
# middle
('abcd', 'bc', 'bc'),
('bc', 'abcd', 'bc'),
# suffix
('abcd', 'cd', 'cd'),
('abcd', 'cd', 'cd'),
# no
('abcd', 'ef', ''),
('ef', 'abcd', ''),
# long
# https://github.com/life4/textdistance/issues/40
('MYTEST' * 100, 'TEST', 'TEST'),
('TEST', 'MYTEST' * 100, 'TEST'),
])
def test_distance(left, right, expected):
actual = ALG(external=False)(left, right)
assert actual == expected
actual = ALG(external=True)(left, right)
assert actual == expected
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