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"""
Tests GDFA alignments
"""
import unittest
from nltk.translate.gdfa import grow_diag_final_and
class TestGDFA(unittest.TestCase):
def test_from_eflomal_outputs(self):
"""
Testing GDFA with first 10 eflomal outputs from issue #1829
https://github.com/nltk/nltk/issues/1829
"""
# Input.
forwards = [
"0-0 1-2",
"0-0 1-1",
"0-0 2-1 3-2 4-3 5-4 6-5 7-6 8-7 7-8 9-9 10-10 9-11 11-12 12-13 13-14",
"0-0 1-1 1-2 2-3 3-4 4-5 4-6 5-7 6-8 8-9 9-10",
"0-0 14-1 15-2 16-3 20-5 21-6 22-7 5-8 6-9 7-10 8-11 9-12 10-13 11-14 12-15 13-16 14-17 17-18 18-19 19-20 20-21 23-22 24-23 25-24 26-25 27-27 28-28 29-29 30-30 31-31",
"0-0 1-1 0-2 2-3",
"0-0 2-2 4-4",
"0-0 1-1 2-3 3-4 5-5 7-6 8-7 9-8 10-9 11-10 12-11 13-12 14-13 15-14 16-16 17-17 18-18 19-19 20-20",
"3-0 4-1 6-2 5-3 6-4 7-5 8-6 9-7 10-8 11-9 16-10 9-12 10-13 12-14",
"1-0",
]
backwards = [
"0-0 1-2",
"0-0 1-1",
"0-0 2-1 3-2 4-3 5-4 6-5 7-6 8-7 9-8 10-10 11-12 12-11 13-13",
"0-0 1-2 2-3 3-4 4-6 6-8 7-5 8-7 9-8",
"0-0 1-8 2-9 3-10 4-11 5-12 6-11 8-13 9-14 10-15 11-16 12-17 13-18 14-19 15-20 16-21 17-22 18-23 19-24 20-29 21-30 22-31 23-2 24-3 25-4 26-5 27-5 28-6 29-7 30-28 31-31",
"0-0 1-1 2-3",
"0-0 1-1 2-3 4-4",
"0-0 1-1 2-3 3-4 5-5 7-6 8-7 9-8 10-9 11-10 12-11 13-12 14-13 15-14 16-16 17-17 18-18 19-19 20-16 21-18",
"0-0 1-1 3-2 4-1 5-3 6-4 7-5 8-6 9-7 10-8 11-9 12-8 13-9 14-8 15-9 16-10",
"1-0",
]
source_lens = [2, 3, 3, 15, 11, 33, 4, 6, 23, 18]
target_lens = [2, 4, 3, 16, 12, 33, 5, 6, 22, 16]
# Expected Output.
expected = [
[(0, 0), (1, 2)],
[(0, 0), (1, 1)],
[
(0, 0),
(2, 1),
(3, 2),
(4, 3),
(5, 4),
(6, 5),
(7, 6),
(8, 7),
(10, 10),
(11, 12),
],
[
(0, 0),
(1, 1),
(1, 2),
(2, 3),
(3, 4),
(4, 5),
(4, 6),
(5, 7),
(6, 8),
(7, 5),
(8, 7),
(8, 9),
(9, 8),
(9, 10),
],
[
(0, 0),
(1, 8),
(2, 9),
(3, 10),
(4, 11),
(5, 8),
(6, 9),
(6, 11),
(7, 10),
(8, 11),
(31, 31),
],
[(0, 0), (0, 2), (1, 1), (2, 3)],
[(0, 0), (1, 1), (2, 2), (2, 3), (4, 4)],
[
(0, 0),
(1, 1),
(2, 3),
(3, 4),
(5, 5),
(7, 6),
(8, 7),
(9, 8),
(10, 9),
(11, 10),
(12, 11),
(13, 12),
(14, 13),
(15, 14),
(16, 16),
(17, 17),
(18, 18),
(19, 19),
],
[
(0, 0),
(1, 1),
(3, 0),
(3, 2),
(4, 1),
(5, 3),
(6, 2),
(6, 4),
(7, 5),
(8, 6),
(9, 7),
(9, 12),
(10, 8),
(10, 13),
(11, 9),
(12, 8),
(12, 14),
(13, 9),
(14, 8),
(15, 9),
(16, 10),
],
[(1, 0)],
[
(0, 0),
(1, 1),
(3, 2),
(4, 3),
(5, 4),
(6, 5),
(7, 6),
(9, 10),
(10, 12),
(11, 13),
(12, 14),
(13, 15),
],
]
# Iterate through all 10 examples and check for expected outputs.
for fw, bw, src_len, trg_len, expect in zip(
forwards, backwards, source_lens, target_lens, expected
):
self.assertListEqual(expect, grow_diag_final_and(src_len, trg_len, fw, bw))
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