# coding=utf-8 # Copyright 2019 HuggingFace Inc. # # 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. import concurrent.futures import json import os import shutil import tempfile import unittest from transformers import AutoTokenizer, PreTrainedTokenizerFast from transformers.testing_utils import require_tokenizers from ..test_tokenization_common import TokenizerTesterMixin @require_tokenizers class PreTrainedTokenizationFastTest(TokenizerTesterMixin, unittest.TestCase): rust_tokenizer_class = PreTrainedTokenizerFast test_slow_tokenizer = False test_rust_tokenizer = True from_pretrained_vocab_key = "tokenizer_file" def setUp(self): self.test_rust_tokenizer = False # because we don't have pretrained_vocab_files_map super().setUp() self.test_rust_tokenizer = True model_paths = ["robot-test/dummy-tokenizer-fast", "robot-test/dummy-tokenizer-wordlevel"] self.bytelevel_bpe_model_name = "SaulLu/dummy-tokenizer-bytelevel-bpe" # Inclusion of 2 tokenizers to test different types of models (Unigram and WordLevel for the moment) self.tokenizers_list = [(PreTrainedTokenizerFast, model_path, {}) for model_path in model_paths] tokenizer = PreTrainedTokenizerFast.from_pretrained(model_paths[0]) tokenizer.save_pretrained(self.tmpdirname) def test_tokenizer_mismatch_warning(self): # We disable this test for PreTrainedTokenizerFast because it is the only tokenizer that is not linked to any # model pass def test_pretrained_model_lists(self): # We disable this test for PreTrainedTokenizerFast because it is the only tokenizer that is not linked to any # model pass def test_prepare_for_model(self): # We disable this test for PreTrainedTokenizerFast because it is the only tokenizer that is not linked to any # model pass def test_rust_tokenizer_signature(self): # PreTrainedTokenizerFast doesn't have tokenizer_file in its signature pass def test_training_new_tokenizer(self): tmpdirname_orig = self.tmpdirname # Here we want to test the 2 available tokenizers that use 2 different types of models: Unigram and WordLevel. for tokenizer, pretrained_name, kwargs in self.tokenizers_list: with self.subTest(f"{tokenizer.__class__.__name__} ({pretrained_name})"): try: self.tmpdirname = tempfile.mkdtemp() tokenizer = self.rust_tokenizer_class.from_pretrained(pretrained_name, **kwargs) tokenizer.save_pretrained(self.tmpdirname) super().test_training_new_tokenizer() finally: # Even if the test fails, we must be sure that the folder is deleted and that the default tokenizer # is restored shutil.rmtree(self.tmpdirname) self.tmpdirname = tmpdirname_orig def test_training_new_tokenizer_with_special_tokens_change(self): tmpdirname_orig = self.tmpdirname # Here we want to test the 2 available tokenizers that use 2 different types of models: Unigram and WordLevel. for tokenizer, pretrained_name, kwargs in self.tokenizers_list: with self.subTest(f"{tokenizer.__class__.__name__} ({pretrained_name})"): try: self.tmpdirname = tempfile.mkdtemp() tokenizer = self.rust_tokenizer_class.from_pretrained(pretrained_name, **kwargs) tokenizer.save_pretrained(self.tmpdirname) super().test_training_new_tokenizer_with_special_tokens_change() finally: # Even if the test fails, we must be sure that the folder is deleted and that the default tokenizer # is restored shutil.rmtree(self.tmpdirname) self.tmpdirname = tmpdirname_orig def test_training_new_tokenizer_with_bytelevel(self): tokenizer = self.rust_tokenizer_class.from_pretrained(self.bytelevel_bpe_model_name) toy_text_iterator = ("a" for _ in range(1000)) new_tokenizer = tokenizer.train_new_from_iterator(text_iterator=toy_text_iterator, length=1000, vocab_size=50) encoding_ids = new_tokenizer.encode("a🤗") self.assertEqual(encoding_ids, [64, 172, 253, 97, 245]) @require_tokenizers class TokenizerVersioningTest(unittest.TestCase): def test_local_versioning(self): tokenizer = AutoTokenizer.from_pretrained("bert-base-cased") json_tokenizer = json.loads(tokenizer._tokenizer.to_str()) json_tokenizer["model"]["vocab"]["huggingface"] = len(tokenizer) with tempfile.TemporaryDirectory() as tmp_dir: # Hack to save this in the tokenizer_config.json tokenizer.init_kwargs["fast_tokenizer_files"] = ["tokenizer.4.0.0.json"] tokenizer.save_pretrained(tmp_dir) json.dump(json_tokenizer, open(os.path.join(tmp_dir, "tokenizer.4.0.0.json"), "w")) # This should pick the new tokenizer file as the version of Transformers is > 4.0.0 new_tokenizer = AutoTokenizer.from_pretrained(tmp_dir) self.assertEqual(len(new_tokenizer), len(tokenizer) + 1) json_tokenizer = json.loads(new_tokenizer._tokenizer.to_str()) self.assertIn("huggingface", json_tokenizer["model"]["vocab"]) # Will need to be adjusted if we reach v42 and this test is still here. # Should pick the old tokenizer file as the version of Transformers is < 4.0.0 shutil.move(os.path.join(tmp_dir, "tokenizer.4.0.0.json"), os.path.join(tmp_dir, "tokenizer.42.0.0.json")) tokenizer.init_kwargs["fast_tokenizer_files"] = ["tokenizer.42.0.0.json"] tokenizer.save_pretrained(tmp_dir) new_tokenizer = AutoTokenizer.from_pretrained(tmp_dir) self.assertEqual(len(new_tokenizer), len(tokenizer)) json_tokenizer = json.loads(new_tokenizer._tokenizer.to_str()) self.assertNotIn("huggingface", json_tokenizer["model"]["vocab"]) def test_repo_versioning(self): # This repo has two tokenizer files, one for v4.0.0 and above with an added token, one for versions lower. repo = "hf-internal-testing/test-two-tokenizers" # This should pick the new tokenizer file as the version of Transformers is > 4.0.0 tokenizer = AutoTokenizer.from_pretrained(repo) self.assertEqual(len(tokenizer), 28997) json_tokenizer = json.loads(tokenizer._tokenizer.to_str()) self.assertIn("huggingface", json_tokenizer["model"]["vocab"]) # Testing an older version by monkey-patching the version in the module it's used. import transformers as old_transformers old_transformers.tokenization_utils_base.__version__ = "3.0.0" old_tokenizer = old_transformers.models.auto.AutoTokenizer.from_pretrained(repo) self.assertEqual(len(old_tokenizer), 28996) json_tokenizer = json.loads(old_tokenizer._tokenizer.to_str()) self.assertNotIn("huggingface", json_tokenizer["model"]["vocab"]) @require_tokenizers class ReduceMutableBorrowTests(unittest.TestCase): def test_async_share_tokenizer(self): # See https://github.com/huggingface/transformers/pull/12550 # and https://github.com/huggingface/tokenizers/issues/537 tokenizer = PreTrainedTokenizerFast.from_pretrained("robot-test/dummy-tokenizer-wordlevel") text = "The Matrix is a 1999 science fiction action film." with concurrent.futures.ThreadPoolExecutor() as executor: futures = [executor.submit(self.fetch, tokenizer, text) for i in range(10)] return_value = [future.result() for future in futures] self.assertEqual(return_value, [[1, 10, 0, 8, 0, 18, 0, 0, 0, 2] for i in range(10)]) def fetch(self, tokenizer, text): return tokenizer.encode(text, truncation="longest_first", padding="longest")