Sync from v0.13

tests/models/language/generation/test_gemma.py

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+import numpy as np
+import pytest
+
+MODELS = ["google/gemma-2b", "google/gemma-2-2b", "google/gemma-3-4b-it"]
+
+
+@pytest.mark.parametrize("model", MODELS)
+def test_dummy_loader(vllm_runner, monkeypatch, model: str) -> None:
+    with monkeypatch.context() as m:
+        m.setenv("VLLM_ALLOW_INSECURE_SERIALIZATION", "1")
+        with vllm_runner(
+            model,
+            load_format="dummy",
+        ) as llm:
+            if model == "google/gemma-3-4b-it":
+                normalizers = llm.llm.collective_rpc(
+                    lambda self: self.model_runner.model.language_model.model.normalizer.cpu().item()  # noqa: E501
+                )
+                config = llm.llm.llm_engine.model_config.hf_config.text_config
+            else:
+                normalizers = llm.llm.collective_rpc(
+                    lambda self: self.model_runner.model.model.normalizer.cpu().item()
+                )
+                config = llm.llm.llm_engine.model_config.hf_config
+            assert np.allclose(normalizers, config.hidden_size**0.5, rtol=2e-3)