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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
import torch.nn as nn
from fairseq.modules import ConvTBC
class TestConvTBC(unittest.TestCase):
def test_convtbc(self):
# ksz, in_channels, out_channels
conv_tbc = ConvTBC(4, 5, kernel_size=3, padding=1)
# out_channels, in_channels, ksz
conv1d = nn.Conv1d(4, 5, kernel_size=3, padding=1)
conv_tbc.weight.data.copy_(conv1d.weight.data.transpose(0, 2))
conv_tbc.bias.data.copy_(conv1d.bias.data)
input_tbc = torch.randn(7, 2, 4, requires_grad=True)
input1d = input_tbc.data.transpose(0, 1).transpose(1, 2)
input1d.requires_grad = True
output_tbc = conv_tbc(input_tbc)
output1d = conv1d(input1d)
self.assertAlmostEqual(
output_tbc.data.transpose(0, 1).transpose(1, 2), output1d.data
)
grad_tbc = torch.randn(output_tbc.size())
grad1d = grad_tbc.transpose(0, 1).transpose(1, 2).contiguous()
output_tbc.backward(grad_tbc)
output1d.backward(grad1d)
self.assertAlmostEqual(
conv_tbc.weight.grad.data.transpose(0, 2), conv1d.weight.grad.data
)
self.assertAlmostEqual(conv_tbc.bias.grad.data, conv1d.bias.grad.data)
self.assertAlmostEqual(
input_tbc.grad.data.transpose(0, 1).transpose(1, 2), input1d.grad.data
)
def assertAlmostEqual(self, t1, t2):
self.assertEqual(t1.size(), t2.size(), "size mismatch")
self.assertLess((t1 - t2).abs().max(), 1e-4)
if __name__ == "__main__":
unittest.main()
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