[V1] V1 Enablement Oracle (#13726)

Signed-off-by: rshaw@neuralmagic.com <rshaw@neuralmagic.com>
Co-authored-by: rshaw@neuralmagic.com <rshaw@neuralmagic.com>
Co-authored-by: Nicolò Lucchesi <nlucches@redhat.com>
Co-authored-by: Tyler Michael Smith <tyler@neuralmagic.com>
Co-authored-by: Michael Goin <michael@neuralmagic.com>

tests/samplers/test_logits_processor.py

@@ -8,6 +8,14 @@ from vllm import SamplingParams
 MODELS = ["distilbert/distilgpt2"]
 
 
+@pytest.fixture(scope="function", autouse=True)
+def use_v0_only(monkeypatch):
+    """
+    This file tests V0 internals, so set VLLM_USE_V1=0.
+    """
+    monkeypatch.setenv('VLLM_USE_V1', '0')
+
+
 @pytest.mark.parametrize("model", MODELS)
 @pytest.mark.parametrize("dtype", ["half"])
 def test_logits_processor_force_generate(