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39 lines
746 B
Python
39 lines
746 B
Python
# external
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import pytest
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# project
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import textdistance
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ALG = textdistance.Matrix
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# https://en.wikipedia.org/wiki/Needleman%E2%80%93Wunsch_algorithm
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NW_MATRIX = {
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('A', 'A'): 10,
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('G', 'G'): 7,
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('C', 'C'): 9,
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('T', 'T'): 8,
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('A', 'G'): -1,
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('A', 'C'): -3,
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('A', 'T'): -4,
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('G', 'C'): -5,
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('G', 'T'): -3,
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('C', 'T'): 0,
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}
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@pytest.mark.parametrize('left, right, expected', [
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('', '', 1),
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('', 'a', 0),
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('abcd', 'abcd', 1),
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('A', 'C', -3),
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('G', 'G', 7),
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('A', 'A', 10),
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('T', 'A', -4),
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('T', 'C', 0),
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('A', 'G', -1),
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('C', 'T', 0),
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])
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def test_distance(left, right, expected):
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actual = ALG(NW_MATRIX, symmetric=True)(left, right)
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assert actual == expected
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