[Core] Support image processor (#4197)

tests/tokenization/test_image_processor.py

@@ -0,0 +1,20 @@
+import pytest
+from transformers.image_processing_utils import BaseImageProcessor
+
+from vllm.transformers_utils.image_processor import get_image_processor
+
+IMAGE_PROCESSOR_NAMES = [
+    "llava-hf/llava-1.5-7b-hf",
+    "llava-hf/llava-v1.6-34b-hf",
+]
+
+
+@pytest.mark.parametrize("processor_name", IMAGE_PROCESSOR_NAMES)
+def test_image_processor_revision(processor_name: str):
+    # Assume that "main" branch always exists
+    image_processor = get_image_processor(processor_name, revision="main")
+    assert isinstance(image_processor, BaseImageProcessor)
+
+    # Assume that "never" branch always does not exist
+    with pytest.raises(OSError, match='not a valid git identifier'):
+        get_image_processor(processor_name, revision="never")