[CI/Build] VLM Test Consolidation (#9372)

Signed-off-by: Alex-Brooks <Alex.Brooks@ibm.com>

tests/engine/test_short_mm_context.py

@@ -0,0 +1,29 @@
+import pytest
+
+from ..conftest import IMAGE_ASSETS
+
+HF_IMAGE_PROMPTS = IMAGE_ASSETS.prompts({
+    "stop_sign":
+    "USER: <image>\nWhat's the content of the image?\nASSISTANT:",
+    "cherry_blossom":
+    "USER: <image>\nWhat is the season?\nASSISTANT:",
+})
+
+models = ["llava-hf/llava-1.5-7b-hf"]
+
+
+@pytest.mark.parametrize("model", models)
+def test_context_length_too_short(vllm_runner, image_assets, model):
+    images = [asset.pil_image for asset in image_assets]
+
+    with pytest.raises(ValueError, match="too long to fit into the model"):
+        vllm_model = vllm_runner(
+            model,
+            max_model_len=128,  # LLaVA has a feature size of 576
+            enforce_eager=True,
+        )
+
+        with vllm_model:
+            vllm_model.generate_greedy([HF_IMAGE_PROMPTS[0]],
+                                       max_tokens=1,
+                                       images=[images[0]])