def test_decode_batch_stable(generate_examples_and_batch):
i1, _, l1, i2, _, l2, i, _, l = generate_examples_and_batch
h = i1.size(2)
crf = CRF(h, batch_first=False)
crf.transitions_p.data = torch.rand(1, h, h)
p1, s1 = crf.decode(i1, l1)
p2, s2 = crf.decode(i2, l2)
pad = torch.zeros(p1.size(0) - p2.size(0), 1, dtype=torch.long)
one_x_one_p = torch.cat([p1, torch.cat([p2, pad], dim=0)], dim=1)
one_x_one_s = torch.cat([s1, s2], dim=0)
batched_p, batched_s = crf.decode(i, l)
np.testing.assert_allclose(one_x_one_s.detach().numpy(), batched_s.detach().numpy())
for p1, p2 in zip(one_x_one_p, batched_p):
np.testing.assert_allclose(p1.detach().numpy(), p2.detach().numpy())
def test_decode_shape_crf(generate_batch):
unary, _, lengths = generate_batch
h = unary.size(2)
crf = CRF(h, batch_first=False)
paths, scores = crf.decode(unary, lengths)
assert scores.shape == torch.Size([unary.size(1)])
assert paths.shape == torch.Size([unary.size(0), unary.size(1)])