95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
import time
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import unittest
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from transformers import is_torch_available
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from transformers.testing_utils import require_torch, torch_device
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from .test_modeling_common import ids_tensor
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if is_torch_available():
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import torch
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from transformers.generation_stopping_criteria import (
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MaxLengthCriteria,
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MaxNewTokensCriteria,
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MaxTimeCriteria,
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StoppingCriteriaList,
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validate_stopping_criteria,
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)
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@require_torch
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class StoppingCriteriaTestCase(unittest.TestCase):
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def _get_tensors(self, length):
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batch_size = 3
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vocab_size = 250
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input_ids = ids_tensor((batch_size, length), vocab_size)
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scores = torch.ones((batch_size, length), device=torch_device, dtype=torch.float) / length
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return input_ids, scores
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def test_list_criteria(self):
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input_ids, scores = self._get_tensors(5)
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criteria = StoppingCriteriaList(
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[
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MaxLengthCriteria(max_length=10),
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MaxTimeCriteria(max_time=0.1),
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]
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)
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self.assertFalse(criteria(input_ids, scores))
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input_ids, scores = self._get_tensors(9)
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self.assertFalse(criteria(input_ids, scores))
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input_ids, scores = self._get_tensors(10)
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self.assertTrue(criteria(input_ids, scores))
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def test_max_length_criteria(self):
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criteria = MaxLengthCriteria(max_length=10)
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input_ids, scores = self._get_tensors(5)
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self.assertFalse(criteria(input_ids, scores))
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input_ids, scores = self._get_tensors(9)
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self.assertFalse(criteria(input_ids, scores))
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input_ids, scores = self._get_tensors(10)
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self.assertTrue(criteria(input_ids, scores))
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def test_max_new_tokens_criteria(self):
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criteria = MaxNewTokensCriteria(start_length=5, max_new_tokens=5)
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input_ids, scores = self._get_tensors(5)
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self.assertFalse(criteria(input_ids, scores))
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input_ids, scores = self._get_tensors(9)
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self.assertFalse(criteria(input_ids, scores))
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input_ids, scores = self._get_tensors(10)
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self.assertTrue(criteria(input_ids, scores))
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criteria_list = StoppingCriteriaList([criteria])
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self.assertEqual(criteria_list.max_length, 10)
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def test_max_time_criteria(self):
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input_ids, scores = self._get_tensors(5)
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criteria = MaxTimeCriteria(max_time=0.1)
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self.assertFalse(criteria(input_ids, scores))
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criteria = MaxTimeCriteria(max_time=0.1, initial_timestamp=time.time() - 0.2)
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self.assertTrue(criteria(input_ids, scores))
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def test_validate_stopping_criteria(self):
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validate_stopping_criteria(StoppingCriteriaList([MaxLengthCriteria(10)]), 10)
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with self.assertWarns(UserWarning):
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validate_stopping_criteria(StoppingCriteriaList([MaxLengthCriteria(10)]), 11)
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stopping_criteria = validate_stopping_criteria(StoppingCriteriaList(), 11)
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self.assertEqual(len(stopping_criteria), 1)
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