72 lines
2.6 KiB
Python
72 lines
2.6 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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# this must be loaded before socket.socket is monkey-patched
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load = """
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from transformers import BertConfig, BertModel, BertTokenizer
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"""
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run = """
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mname = "lysandre/tiny-bert-random"
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BertConfig.from_pretrained(mname)
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BertModel.from_pretrained(mname)
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BertTokenizer.from_pretrained(mname)
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print("success")
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"""
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mock = """
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import socket
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def offline_socket(*args, **kwargs): raise socket.error("Offline mode is enabled")
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socket.socket = offline_socket
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"""
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# baseline - just load from_pretrained with normal network
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cmd = [sys.executable, "-c", "\n".join([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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self.assertIn("success", result.stdout.decode())
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# next emulate no network
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cmd = [sys.executable, "-c", "\n".join([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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self.assertIn("success", result.stdout.decode())
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