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# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import unittest
import torch
from fairseq import utils
class TestUtils(unittest.TestCase):
def test_convert_padding_direction(self):
pad = 1
left_pad = torch.LongTensor([
[2, 3, 4, 5, 6],
[1, 7, 8, 9, 10],
[1, 1, 1, 11, 12],
])
right_pad = torch.LongTensor([
[2, 3, 4, 5, 6],
[7, 8, 9, 10, 1],
[11, 12, 1, 1, 1],
])
self.assertAlmostEqual(
right_pad,
utils.convert_padding_direction(
left_pad,
pad,
left_to_right=True,
),
)
self.assertAlmostEqual(
left_pad,
utils.convert_padding_direction(
right_pad,
pad,
right_to_left=True,
),
)
def test_make_positions(self):
pad = 1
left_pad_input = torch.LongTensor([
[9, 9, 9, 9, 9],
[1, 9, 9, 9, 9],
[1, 1, 1, 9, 9],
])
left_pad_output = torch.LongTensor([
[2, 3, 4, 5, 6],
[1, 2, 3, 4, 5],
[1, 1, 1, 2, 3],
])
right_pad_input = torch.LongTensor([
[9, 9, 9, 9, 9],
[9, 9, 9, 9, 1],
[9, 9, 1, 1, 1],
])
right_pad_output = torch.LongTensor([
[2, 3, 4, 5, 6],
[2, 3, 4, 5, 1],
[2, 3, 1, 1, 1],
])
self.assertAlmostEqual(
left_pad_output,
utils.make_positions(left_pad_input, pad),
)
self.assertAlmostEqual(
right_pad_output,
utils.make_positions(right_pad_input, pad),
)
def assertAlmostEqual(self, t1, t2):
self.assertEqual(t1.size(), t2.size(), "size mismatch")
self.assertLess(utils.item((t1 - t2).abs().max()), 1e-4)
if __name__ == '__main__':
unittest.main()
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