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tests / test_file_utils.py

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	# Copyright 2020 The HuggingFace 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.

	import unittest

	import requests

	# Try to import everything from transformers to ensure every object can be loaded.
	from transformers import * # noqa F406
	from transformers.file_utils import CONFIG_NAME, WEIGHTS_NAME, filename_to_url, get_from_cache, hf_bucket_url
	from transformers.testing_utils import DUMMY_UNKWOWN_IDENTIFIER


	MODEL_ID = DUMMY_UNKWOWN_IDENTIFIER
	# An actual model hosted on huggingface.co

	REVISION_ID_DEFAULT = "main"
	# Default branch name
	REVISION_ID_ONE_SPECIFIC_COMMIT = "f2c752cfc5c0ab6f4bdec59acea69eefbee381c2"
	# One particular commit (not the top of `main`)
	REVISION_ID_INVALID = "aaaaaaa"
	# This commit does not exist, so we should 404.

	PINNED_SHA1 = "d9e9f15bc825e4b2c9249e9578f884bbcb5e3684"
	# Sha-1 of config.json on the top of `main`, for checking purposes
	PINNED_SHA256 = "4b243c475af8d0a7754e87d7d096c92e5199ec2fe168a2ee7998e3b8e9bcb1d3"
	# Sha-256 of pytorch_model.bin on the top of `main`, for checking purposes


	class GetFromCacheTests(unittest.TestCase):
	def test_bogus_url(self):
	# This lets us simulate no connection
	# as the error raised is the same
	# `ConnectionError`
	url = "https://bogus"
	with self.assertRaisesRegex(ValueError, "Connection error"):
	_ = get_from_cache(url)

	def test_file_not_found(self):
	# Valid revision (None) but missing file.
	url = hf_bucket_url(MODEL_ID, filename="missing.bin")
	with self.assertRaisesRegex(requests.exceptions.HTTPError, "404 Client Error"):
	_ = get_from_cache(url)

	def test_revision_not_found(self):
	# Valid file but missing revision
	url = hf_bucket_url(MODEL_ID, filename=CONFIG_NAME, revision=REVISION_ID_INVALID)
	with self.assertRaisesRegex(requests.exceptions.HTTPError, "404 Client Error"):
	_ = get_from_cache(url)

	def test_standard_object(self):
	url = hf_bucket_url(MODEL_ID, filename=CONFIG_NAME, revision=REVISION_ID_DEFAULT)
	filepath = get_from_cache(url, force_download=True)
	metadata = filename_to_url(filepath)
	self.assertEqual(metadata, (url, f'"{PINNED_SHA1}"'))

	def test_standard_object_rev(self):
	# Same object, but different revision
	url = hf_bucket_url(MODEL_ID, filename=CONFIG_NAME, revision=REVISION_ID_ONE_SPECIFIC_COMMIT)
	filepath = get_from_cache(url, force_download=True)
	metadata = filename_to_url(filepath)
	self.assertNotEqual(metadata[1], f'"{PINNED_SHA1}"')
	# Caution: check that the etag is not equal to the one from `test_standard_object`

	def test_lfs_object(self):
	url = hf_bucket_url(MODEL_ID, filename=WEIGHTS_NAME, revision=REVISION_ID_DEFAULT)
	filepath = get_from_cache(url, force_download=True)
	metadata = filename_to_url(filepath)
	self.assertEqual(metadata, (url, f'"{PINNED_SHA256}"'))