[BugFix] Fix test breakages from transformers 4.45 upgrade (#8829)

tests/samplers/test_sampler.py

@@ -1,5 +1,6 @@
 import itertools
 import random
+from dataclasses import dataclass
 from typing import Dict, List, Optional, Tuple
 from unittest.mock import Mock, patch
 
@@ -596,8 +597,19 @@ def test_sampler_top_k_top_p(seed: int, device: str):
     generation_config = GenerationConfig(top_k=top_k,
                                          top_p=top_p,
                                          do_sample=True)
-    warpers = generation_model._get_logits_warper(generation_config, device)
-    assert len(warpers) == 2  # top_p and top_k
+
+    @dataclass
+    class MockConfig:
+        is_encoder_decoder: bool = False
+
+    generation_model.config = MockConfig()  # needed by the following method
+    generation_model._prepare_special_tokens(generation_config, device=device)
+    processors = generation_model._get_logits_processor(generation_config,
+                                                        None,
+                                                        None,
+                                                        None, [],
+                                                        device=device)
+    assert len(processors) == 2  # top_p and top_k
 
     seq_group_metadata_list: List[SequenceGroupMetadata] = []
     seq_lens: List[int] = []
@@ -639,7 +651,7 @@ def test_sampler_top_k_top_p(seed: int, device: str):
 
     assert sample_probs is not None
 
-    hf_probs = warpers(torch.zeros_like(fake_logits), fake_logits.clone())
+    hf_probs = processors(torch.zeros_like(fake_logits), fake_logits.clone())
     hf_probs = torch.softmax(hf_probs, dim=-1, dtype=torch.float)
     torch.testing.assert_close(hf_probs, sample_probs, rtol=0.0, atol=1e-5)
     assert torch.equal(hf_probs.eq(0), sample_probs.eq(0))