[CI] Add PPL test for generation models (#24485)

Signed-off-by: wang.yuqi <noooop@126.com>

tests/models/language/generation_ppl_test/test_qwen.py

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import pytest
+
+from tests.models.utils import GenerateModelInfo
+
+from .ppl_utils import wikitext_ppl_test
+
+MODELS = [
+    GenerateModelInfo("Qwen/Qwen3-0.6B"),
+    GenerateModelInfo("Qwen/Qwen3-0.6B-FP8"),
+    # transformers:
+    # Loading a GPTQ quantized model requires optimum, gptqmodel
+    # GenerateModelInfo("Qwen/Qwen3-0.6B-GPTQ-Int8"),
+]
+
+
+@pytest.mark.parametrize("model_info", MODELS)
+def test_ppl(hf_runner, vllm_runner, model_info: GenerateModelInfo):
+    wikitext_ppl_test(hf_runner, vllm_runner, model_info)