# What does this PR do?

This PR fixes the last batch of models that are too big for common tests. After it, only two classes override the common test to skip it:
- timm-backbone
- layoutlmv2
In the first case, it's because there is no timm model small enough to work (I did switch to the smallest resnet though) and in the second detectron2 does not let us configure a smaller backbone (I did try with the constant exposed by they don't seem to have any effect).
Fix last models for common tests that are too big.. # What does this PR do?

This PR fixes the last batch of models that are too big for common tests. After it, only two classes override the common test to skip it:
- timm-backbone
- layoutlmv2
In the first case, it's because there is no timm model small enough to work (I did switch to the smallest resnet though) and in the second detectron2 does not let us configure a smaller backbone (I did try with the constant exposed by they don't seem to have any effect).
# 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 json
import os
import tempfile
import unittest
import unittest.mock as mock
from pathlib import Path

from requests.exceptions import HTTPError

from transformers.utils import (
    CONFIG_NAME,
    FLAX_WEIGHTS_NAME,
    TF2_WEIGHTS_NAME,
    TRANSFORMERS_CACHE,
    WEIGHTS_NAME,
    cached_file,
    get_file_from_repo,
    has_file,
)


RANDOM_BERT = "hf-internal-testing/tiny-random-bert"
CACHE_DIR = os.path.join(TRANSFORMERS_CACHE, "models--hf-internal-testing--tiny-random-bert")
FULL_COMMIT_HASH = "9b8c223d42b2188cb49d29af482996f9d0f3e5a6"


class GetFromCacheTests(unittest.TestCase):
    def test_cached_file(self):
        archive_file = cached_file(RANDOM_BERT, CONFIG_NAME)
        # Should have downloaded the file in here
        self.assertTrue(os.path.isdir(CACHE_DIR))
        # Cache should contain at least those three subfolders:
        for subfolder in ["blobs", "refs", "snapshots"]:
            self.assertTrue(os.path.isdir(os.path.join(CACHE_DIR, subfolder)))
        with open(os.path.join(CACHE_DIR, "refs", "main")) as f:
            main_commit = f.read()
        self.assertEqual(archive_file, os.path.join(CACHE_DIR, "snapshots", main_commit, CONFIG_NAME))
        self.assertTrue(os.path.isfile(archive_file))

        # File is cached at the same place the second time.
        new_archive_file = cached_file(RANDOM_BERT, CONFIG_NAME)
        self.assertEqual(archive_file, new_archive_file)

        # Using a specific revision to test the full commit hash.
        archive_file = cached_file(RANDOM_BERT, CONFIG_NAME, revision="9b8c223")
        self.assertEqual(archive_file, os.path.join(CACHE_DIR, "snapshots", FULL_COMMIT_HASH, CONFIG_NAME))

    def test_cached_file_errors(self):
        with self.assertRaisesRegex(EnvironmentError, "is not a valid model identifier"):
            _ = cached_file("tiny-random-bert", CONFIG_NAME)

        with self.assertRaisesRegex(EnvironmentError, "is not a valid git identifier"):
            _ = cached_file(RANDOM_BERT, CONFIG_NAME, revision="aaaa")

        with self.assertRaisesRegex(EnvironmentError, "does not appear to have a file named"):
            _ = cached_file(RANDOM_BERT, "conf")

    def test_non_existence_is_cached(self):
        with self.assertRaisesRegex(EnvironmentError, "does not appear to have a file named"):
            _ = cached_file(RANDOM_BERT, "conf")

        with open(os.path.join(CACHE_DIR, "refs", "main")) as f:
            main_commit = f.read()
        self.assertTrue(os.path.isfile(os.path.join(CACHE_DIR, ".no_exist", main_commit, "conf")))

        path = cached_file(RANDOM_BERT, "conf", _raise_exceptions_for_missing_entries=False)
        self.assertIsNone(path)

        path = cached_file(RANDOM_BERT, "conf", local_files_only=True, _raise_exceptions_for_missing_entries=False)
        self.assertIsNone(path)

        response_mock = mock.Mock()
        response_mock.status_code = 500
        response_mock.headers = {}
        response_mock.raise_for_status.side_effect = HTTPError
        response_mock.json.return_value = {}

        # Under the mock environment we get a 500 error when trying to reach the tokenizer.
        with mock.patch("requests.Session.request", return_value=response_mock) as mock_head:
            path = cached_file(RANDOM_BERT, "conf", _raise_exceptions_for_connection_errors=False)
            self.assertIsNone(path)
            # This check we did call the fake head request
            mock_head.assert_called()

    def test_has_file(self):
        self.assertTrue(has_file("hf-internal-testing/tiny-bert-pt-only", WEIGHTS_NAME))
        self.assertFalse(has_file("hf-internal-testing/tiny-bert-pt-only", TF2_WEIGHTS_NAME))
        self.assertFalse(has_file("hf-internal-testing/tiny-bert-pt-only", FLAX_WEIGHTS_NAME))

    def test_get_file_from_repo_distant(self):
        # `get_file_from_repo` returns None if the file does not exist
        self.assertIsNone(get_file_from_repo("bert-base-cased", "ahah.txt"))

        # The function raises if the repository does not exist.
        with self.assertRaisesRegex(EnvironmentError, "is not a valid model identifier"):
            get_file_from_repo("bert-base-case", CONFIG_NAME)

        # The function raises if the revision does not exist.
        with self.assertRaisesRegex(EnvironmentError, "is not a valid git identifier"):
            get_file_from_repo("bert-base-cased", CONFIG_NAME, revision="ahaha")

        resolved_file = get_file_from_repo("bert-base-cased", CONFIG_NAME)
        # The name is the cached name which is not very easy to test, so instead we load the content.
        config = json.loads(open(resolved_file, "r").read())
        self.assertEqual(config["hidden_size"], 768)

    def test_get_file_from_repo_local(self):
        with tempfile.TemporaryDirectory() as tmp_dir:
            filename = Path(tmp_dir) / "a.txt"
            filename.touch()
            self.assertEqual(get_file_from_repo(tmp_dir, "a.txt"), str(filename))

            self.assertIsNone(get_file_from_repo(tmp_dir, "b.txt"))

# 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 json
import os
import tempfile
import unittest
import unittest.mock as mock
from pathlib import Path

from requests.exceptions import HTTPError

from transformers.utils import (
    CONFIG_NAME,
    FLAX_WEIGHTS_NAME,
    TF2_WEIGHTS_NAME,
    TRANSFORMERS_CACHE,
    WEIGHTS_NAME,
    cached_file,
    get_file_from_repo,
    has_file,
)


RANDOM_BERT = "hf-internal-testing/tiny-random-bert"
CACHE_DIR = os.path.join(TRANSFORMERS_CACHE, "models--hf-internal-testing--tiny-random-bert")
FULL_COMMIT_HASH = "9b8c223d42b2188cb49d29af482996f9d0f3e5a6"


class GetFromCacheTests(unittest.TestCase):
    def test_cached_file(self):
        archive_file = cached_file(RANDOM_BERT, CONFIG_NAME)
        # Should have downloaded the file in here
        self.assertTrue(os.path.isdir(CACHE_DIR))
        # Cache should contain at least those three subfolders:
        for subfolder in ["blobs", "refs", "snapshots"]:
            self.assertTrue(os.path.isdir(os.path.join(CACHE_DIR, subfolder)))
        with open(os.path.join(CACHE_DIR, "refs", "main")) as f:
            main_commit = f.read()
        self.assertEqual(archive_file, os.path.join(CACHE_DIR, "snapshots", main_commit, CONFIG_NAME))
        self.assertTrue(os.path.isfile(archive_file))

        # File is cached at the same place the second time.
        new_archive_file = cached_file(RANDOM_BERT, CONFIG_NAME)
        self.assertEqual(archive_file, new_archive_file)

        # Using a specific revision to test the full commit hash.
        archive_file = cached_file(RANDOM_BERT, CONFIG_NAME, revision="9b8c223")
        self.assertEqual(archive_file, os.path.join(CACHE_DIR, "snapshots", FULL_COMMIT_HASH, CONFIG_NAME))

    def test_cached_file_errors(self):
        with self.assertRaisesRegex(EnvironmentError, "is not a valid model identifier"):
            _ = cached_file("tiny-random-bert", CONFIG_NAME)

        with self.assertRaisesRegex(EnvironmentError, "is not a valid git identifier"):
            _ = cached_file(RANDOM_BERT, CONFIG_NAME, revision="aaaa")

        with self.assertRaisesRegex(EnvironmentError, "does not appear to have a file named"):
            _ = cached_file(RANDOM_BERT, "conf")

    def test_non_existence_is_cached(self):
        with self.assertRaisesRegex(EnvironmentError, "does not appear to have a file named"):
            _ = cached_file(RANDOM_BERT, "conf")

        with open(os.path.join(CACHE_DIR, "refs", "main")) as f:
            main_commit = f.read()
        self.assertTrue(os.path.isfile(os.path.join(CACHE_DIR, ".no_exist", main_commit, "conf")))

        path = cached_file(RANDOM_BERT, "conf", _raise_exceptions_for_missing_entries=False)
        self.assertIsNone(path)

        path = cached_file(RANDOM_BERT, "conf", local_files_only=True, _raise_exceptions_for_missing_entries=False)
        self.assertIsNone(path)

        response_mock = mock.Mock()
        response_mock.status_code = 500
        response_mock.headers = {}
        response_mock.raise_for_status.side_effect = HTTPError
        response_mock.json.return_value = {}

        # Under the mock environment we get a 500 error when trying to reach the tokenizer.
        with mock.patch("requests.Session.request", return_value=response_mock) as mock_head:
            path = cached_file(RANDOM_BERT, "conf", _raise_exceptions_for_connection_errors=False)
            self.assertIsNone(path)
            # This check we did call the fake head request
            mock_head.assert_called()

    def test_has_file(self):
        self.assertTrue(has_file("hf-internal-testing/tiny-bert-pt-only", WEIGHTS_NAME))
        self.assertFalse(has_file("hf-internal-testing/tiny-bert-pt-only", TF2_WEIGHTS_NAME))
        self.assertFalse(has_file("hf-internal-testing/tiny-bert-pt-only", FLAX_WEIGHTS_NAME))

    def test_get_file_from_repo_distant(self):
        # `get_file_from_repo` returns None if the file does not exist
        self.assertIsNone(get_file_from_repo("bert-base-cased", "ahah.txt"))

        # The function raises if the repository does not exist.
        with self.assertRaisesRegex(EnvironmentError, "is not a valid model identifier"):
            get_file_from_repo("bert-base-case", CONFIG_NAME)

        # The function raises if the revision does not exist.
        with self.assertRaisesRegex(EnvironmentError, "is not a valid git identifier"):
            get_file_from_repo("bert-base-cased", CONFIG_NAME, revision="ahaha")

        resolved_file = get_file_from_repo("bert-base-cased", CONFIG_NAME)
        # The name is the cached name which is not very easy to test, so instead we load the content.
        config = json.loads(open(resolved_file, "r").read())
        self.assertEqual(config["hidden_size"], 768)

    def test_get_file_from_repo_local(self):
        with tempfile.TemporaryDirectory() as tmp_dir:
            filename = Path(tmp_dir) / "a.txt"
            filename.touch()
            self.assertEqual(get_file_from_repo(tmp_dir, "a.txt"), str(filename))

            self.assertIsNone(get_file_from_repo(tmp_dir, "b.txt"))
