Add integration tests for original_output in vLLM's generate

tests/generate/test_integration_vllm.py

@@ -4,6 +4,7 @@
 import pytest
 import torch
 from pydantic import BaseModel, constr
+from vllm.outputs import RequestOutput
 from vllm.sampling_params import SamplingParams
 
 import outlines.generate as generate
@@ -42,15 +43,31 @@ def test_vllm_generation_api(model, generator_type, params):
     res = generator("test", stop_at=[".", "ab"])
     assert isinstance(res, str)
 
+    res = generator("test", original_output=True)
+    assert isinstance(res, list)
+    assert len(res) == 1
+    assert isinstance(res[0], RequestOutput)
+
     res1 = generator("test", seed=1)
     res2 = generator("test", seed=1)
     assert isinstance(res1, str)
     assert isinstance(res2, str)
     assert res1 == res2
 
+    res1 = generator("test", seed=1, original_output=True)
+    res2 = generator("test", seed=1)
+    assert isinstance(res1[0], RequestOutput)
+    assert isinstance(res2, str)
+    text1 = [sample.text for sample in res1[0].outputs]
+    assert len(text1) == 1
+    assert text1[0] == res2
+
     res = generator(["test", "test1"])
     assert len(res) == 2
 
+    res = generator(["test", "test1"], original_output=True)
+    assert len(res) == 2
+
 
 def test_vllm_sampling_params(model):
     generator = generate.text(model)