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# coding=utf-8
# Copyright 2018 The Hugging Face Inc. Team
#
# 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 logging
import unittest
from transformers import is_torch_available
from .utils import require_torch, slow
if is_torch_available():
from transformers import BertModel, BertForMaskedLM, Model2Model
from transformers.modeling_bert import BERT_PRETRAINED_MODEL_ARCHIVE_MAP
@require_torch
class EncoderDecoderModelTest(unittest.TestCase):
@slow
def test_model2model_from_pretrained(self):
logging.basicConfig(level=logging.INFO)
for model_name in list(BERT_PRETRAINED_MODEL_ARCHIVE_MAP.keys())[:1]:
model = Model2Model.from_pretrained(model_name)
self.assertIsInstance(model.encoder, BertModel)
self.assertIsInstance(model.decoder, BertForMaskedLM)
self.assertEqual(model.decoder.config.is_decoder, True)
self.assertEqual(model.encoder.config.is_decoder, False)
def test_model2model_from_pretrained_not_bert(self):
logging.basicConfig(level=logging.INFO)
with self.assertRaises(ValueError):
_ = Model2Model.from_pretrained("roberta")
with self.assertRaises(ValueError):
_ = Model2Model.from_pretrained("distilbert")
with self.assertRaises(ValueError):
_ = Model2Model.from_pretrained("does-not-exist")
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