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https://github.com/huggingface/transformers.git
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88a951e3cc
* offline mode start * add specific values * fix fallback * add test * better values check and range * test that actually works * document the offline mode * Apply suggestions from code review Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * more strict check * cleaner test * pt-only test * style Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
54 lines
2.4 KiB
Python
54 lines
2.4 KiB
Python
# Copyright 2020 The HuggingFace Team. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import subprocess
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import sys
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from transformers.testing_utils import TestCasePlus, require_torch
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class OfflineTests(TestCasePlus):
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@require_torch
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def test_offline_mode(self):
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# this test is a bit tricky since TRANSFORMERS_OFFLINE can only be changed before
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# `transformers` is loaded, and it's too late for inside pytest - so we are changing it
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# while running an external program
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# python one-liner segments
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load = "from transformers import BertConfig, BertModel, BertTokenizer;"
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run = "mname = 'lysandre/tiny-bert-random'; BertConfig.from_pretrained(mname) and BertModel.from_pretrained(mname) and BertTokenizer.from_pretrained(mname);"
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mock = 'import socket; exec("def offline_socket(*args, **kwargs): raise socket.error(\\"Offline mode is enabled.\\")"); socket.socket = offline_socket;'
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# baseline - just load from_pretrained with normal network
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cmd = [sys.executable, "-c", f"{load} {run}"]
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# should succeed
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env = self.get_env()
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result = subprocess.run(cmd, env=env, check=False, capture_output=True)
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self.assertEqual(result.returncode, 0, result.stderr)
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# next emulate no network
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cmd = [sys.executable, "-c", f"{load} {mock} {run}"]
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# should normally fail as it will fail to lookup the model files w/o the network
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env["TRANSFORMERS_OFFLINE"] = "0"
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result = subprocess.run(cmd, env=env, check=False, capture_output=True)
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self.assertEqual(result.returncode, 1, result.stderr)
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# should succeed as TRANSFORMERS_OFFLINE=1 tells it to use local files
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env["TRANSFORMERS_OFFLINE"] = "1"
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result = subprocess.run(cmd, env=env, check=False, capture_output=True)
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self.assertEqual(result.returncode, 0, result.stderr)
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