def METHOD_NAME(self) -> None:
    tensorA = torch.tensor([1, 0], dtype=torch.float)
    tensorB = torch.tensor([0, 1], dtype=torch.float)
    unk_tensor = torch.tensor([0, 0], dtype=torch.float)
    tokens = ["a", "b"]
    vecs = torch.stack((tensorA, tensorB), 0)
    vectors_obj = build_vectors(tokens, vecs, unk_tensor=unk_tensor)
    tokens_to_lookup = ["a", "b", "c"]
    expected_vectors = torch.stack((tensorA, tensorB, unk_tensor), 0)
    vectors_by_tokens = vectors_obj.lookup_vectors(tokens_to_lookup)
    self.assertEqual(expected_vectors, vectors_by_tokens)