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# coding=utf-8
# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Testing suite for the PyTorch CpmBee tokenizer. """
import os
import unittest
from transformers.models.cpmbee.tokenization_cpmbee import VOCAB_FILES_NAMES, CpmBeeTokenizer
from transformers.tokenization_utils import AddedToken
from ...test_tokenization_common import TokenizerTesterMixin
class CPMBeeTokenizationTest(TokenizerTesterMixin, unittest.TestCase):
tokenizer_class = CpmBeeTokenizer
test_rust_tokenizer = False
def setUp(self):
super().setUp()
vocab_tokens = [
"<d>",
"</d>",
"<s>",
"</s>",
"</_>",
"<unk>",
"<pad>",
"<mask>",
"</n>",
"我",
"是",
"C",
"P",
"M",
"B",
"e",
"e",
]
self.vocab_file = os.path.join(self.tmpdirname, VOCAB_FILES_NAMES["vocab_file"])
vocab_tokens = list(set(vocab_tokens))
with open(self.vocab_file, "w", encoding="utf-8") as vocab_writer:
vocab_writer.write("".join([x + "\n" for x in vocab_tokens]))
# override test_add_tokens_tokenizer because <...> is special token in CpmBeeTokenizer.
def test_add_tokens_tokenizer(self):
tokenizers = self.get_tokenizers(do_lower_case=False)
for tokenizer in tokenizers:
with self.subTest(f"{tokenizer.__class__.__name__}"):
vocab_size = tokenizer.vocab_size
all_size = len(tokenizer)
self.assertNotEqual(vocab_size, 0)
# We usually have added tokens from the start in tests because our vocab fixtures are
# smaller than the original vocabs - let's not assert this
# self.assertEqual(vocab_size, all_size)
new_toks = ["aaaaa bbbbbb", "cccccccccdddddddd"]
added_toks = tokenizer.add_tokens(new_toks)
vocab_size_2 = tokenizer.vocab_size
all_size_2 = len(tokenizer)
self.assertNotEqual(vocab_size_2, 0)
self.assertEqual(vocab_size, vocab_size_2)
self.assertEqual(added_toks, len(new_toks))
self.assertEqual(all_size_2, all_size + len(new_toks))
tokens = tokenizer.encode("aaaaa bbbbbb low cccccccccdddddddd l", add_special_tokens=False)
self.assertGreaterEqual(len(tokens), 4)
self.assertGreater(tokens[0], tokenizer.vocab_size - 1)
self.assertGreater(tokens[-2], tokenizer.vocab_size - 1)
new_toks_2 = {"eos_token": ">>>>|||<||<<|<<", "pad_token": "<<<<<|||;;;||;"}
added_toks_2 = tokenizer.add_special_tokens(new_toks_2)
vocab_size_3 = tokenizer.vocab_size
all_size_3 = len(tokenizer)
self.assertNotEqual(vocab_size_3, 0)
self.assertEqual(vocab_size, vocab_size_3)
self.assertEqual(added_toks_2, len(new_toks_2))
self.assertEqual(all_size_3, all_size_2 + len(new_toks_2))
tokens = tokenizer.encode(
">>>>|||<||<<|<< aaaaabbbbbb low cccccccccdddddddd <<<<<|||;;;||; l", add_special_tokens=False
)
self.assertGreaterEqual(len(tokens), 6)
self.assertGreater(tokens[0], tokenizer.vocab_size - 1)
self.assertGreater(tokens[0], tokens[1])
self.assertGreater(tokens[-2], tokenizer.vocab_size - 1)
self.assertGreater(tokens[-2], tokens[-3])
self.assertEqual(tokens[0], tokenizer.eos_token_id)
self.assertEqual(tokens[-2], tokenizer.pad_token_id)
def test_added_tokens_do_lower_case(self):
tokenizers = self.get_tokenizers(do_lower_case=True)
for tokenizer in tokenizers:
with self.subTest(f"{tokenizer.__class__.__name__}"):
if not hasattr(tokenizer, "do_lower_case") or not tokenizer.do_lower_case:
continue
special_token = tokenizer.all_special_tokens[0]
text = special_token + " aaaaa bbbbbb low cccccccccdddddddd l " + special_token
text2 = special_token + " AAAAA BBBBBB low CCCCCCCCCDDDDDDDD l " + special_token
toks_before_adding = tokenizer.tokenize(text) # toks before adding new_toks
new_toks = ["aaaaa bbbbbb", "cccccccccdddddddd", "AAAAA BBBBBB", "CCCCCCCCCDDDDDDDD"]
added = tokenizer.add_tokens([AddedToken(tok, lstrip=True, rstrip=True) for tok in new_toks])
toks_after_adding = tokenizer.tokenize(text)
toks_after_adding2 = tokenizer.tokenize(text2)
# Rust tokenizers dont't lowercase added tokens at the time calling `tokenizer.add_tokens`,
# while python tokenizers do, so new_toks 0 and 2 would be treated as the same, so do new_toks 1 and 3.
self.assertIn(added, [2, 4])
self.assertListEqual(toks_after_adding, toks_after_adding2)
self.assertTrue(
len(toks_before_adding) > len(toks_after_adding), # toks_before_adding should be longer
)
# Check that none of the special tokens are lowercased
sequence_with_special_tokens = "A " + " yEs ".join(tokenizer.all_special_tokens) + " B"
# Convert the tokenized list to str as some special tokens are tokenized like normal tokens
# which have a prefix spacee e.g. the mask token of Albert, and cannot match the original
# special tokens exactly.
tokenized_sequence = "".join(tokenizer.tokenize(sequence_with_special_tokens))
for special_token in tokenizer.all_special_tokens:
self.assertTrue(special_token in tokenized_sequence)
tokenizers = self.get_tokenizers(do_lower_case=True)
for tokenizer in tokenizers:
with self.subTest(f"{tokenizer.__class__.__name__}"):
if hasattr(tokenizer, "do_lower_case") and tokenizer.do_lower_case:
continue
special_token = tokenizer.all_special_tokens[0]
text = special_token + " aaaaa bbbbbb low cccccccccdddddddd l " + special_token
text2 = special_token + " AAAAA BBBBBB low CCCCCCCCCDDDDDDDD l " + special_token
toks_before_adding = tokenizer.tokenize(text) # toks before adding new_toks
new_toks = ["aaaaa bbbbbb", "cccccccccdddddddd", "AAAAA BBBBBB", "CCCCCCCCCDDDDDDDD"]
added = tokenizer.add_tokens([AddedToken(tok, lstrip=True, rstrip=True) for tok in new_toks])
self.assertIn(added, [2, 4])
toks_after_adding = tokenizer.tokenize(text)
toks_after_adding2 = tokenizer.tokenize(text2)
self.assertEqual(len(toks_after_adding), len(toks_after_adding2)) # Length should still be the same
self.assertNotEqual(
toks_after_adding[1], toks_after_adding2[1]
) # But at least the first non-special tokens should differ
self.assertTrue(
len(toks_before_adding) > len(toks_after_adding), # toks_before_adding should be longer
)
def test_pre_tokenization(self):
tokenizer = CpmBeeTokenizer.from_pretrained("openbmb/cpm-bee-10b")
texts = {"input": "你好，", "<ans>": ""}
tokens = tokenizer(texts)
tokens = tokens["input_ids"][0]
input_tokens = [6, 8, 7, 6, 65678, 7, 6, 10273, 246, 7, 6, 9, 7]
self.assertListEqual(tokens, input_tokens)
normalized_text = "<s><root></s><s>input</s><s>你好，</s><s><ans></s>"
reconstructed_text = tokenizer.decode(tokens)
self.assertEqual(reconstructed_text, normalized_text)
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