Re-add unit test

tests/deepsparse/transformers/pipelines/test_text_generation.py

@@ -104,6 +104,29 @@ def test_token_generation_non_deterministic(pipeline, prompt):
     assert len(set(text_outputs)) == 3
 
 
+def test_pipeline_for_ppl_eval(self, ):
+    pipeline = self.get_pipeline(
+        task="text-generation",
+        model_path=self.model_stub,
+        sequence_length=self.sequence_length,
+        prompt_sequence_length=1,
+    )
+    inputs = dict(
+        prompt=self.prompt,
+        output_scores=True,
+        return_input_tokens=True,
+        fixed_sequences_length=True,
+        include_prompt_logits=True,
+        max_length=1,
+    )
+    predictions = pipeline(**inputs)
+    assert hasattr(predictions, "generations")
+    assert hasattr(predictions.generations[0], "score")
+    assert hasattr(predictions.generations[0], "input_tokens")
+    assert "input_ids" in predictions.generations[0].input_tokens
+    assert "attention_mask" in predictions.generations[0].input_tokens
+
+
 def test_streaming_mode_returns_generator(pipeline, prompt):
     response_generator = pipeline(prompt, streaming=True)
     assert inspect.isgenerator(