test_gemini_image_size_limit_exceeded

tests/llm_translation/test_gemini.py

@@ -1401,3 +1401,37 @@ def test_anthropic_thinking_param_via_map_openai_params():
     assert "thinkingLevel" not in thinking_config_2, "Should NOT have thinkingLevel for Gemini 2"
     assert thinking_config_2["includeThoughts"] is True
     assert thinking_config_2["thinkingBudget"] == 10000
+
+
+def test_gemini_image_size_limit_exceeded():
+    """
+    Test that large images exceeding MAX_IMAGE_URL_DOWNLOAD_SIZE_MB are rejected.
+    
+    This validates that the 50MB default limit prevents downloading very large images
+    that could cause memory issues and pod crashes.
+    """
+    messages = [
+        {
+            "role": "user",
+            "content": [
+                {
+                    "type": "text",
+                    "text": "What is in this image?"
+                },
+                {
+                    "type": "image_url",
+                    "image_url": "https://upload.wikimedia.org/wikipedia/commons/5/51/Blue_Marble_2002.jpg"
+                }
+            ]
+        }
+    ]
+    
+    with pytest.raises(litellm.ImageFetchError) as excinfo:
+        completion(
+            model="gemini/gemini-2.5-flash-lite",
+            messages=messages
+        )
+    
+    error_message = str(excinfo.value)
+    assert "Image size" in error_message
+    assert "exceeds maximum allowed size" in error_message