Test regex in vision api (#926)

test/srt/test_openai_server.py

@@ -139,10 +139,12 @@ class TestOpenAIServer(unittest.TestCase):
             model=self.model,
             messages=[
                 {"role": "system", "content": "You are a helpful AI assistant"},
-                {"role": "user", "content": "What is the capital of France?"},
+                {
+                    "role": "user",
+                    "content": "What is the capital of France? Answer in a few words.",
+                },
             ],
             temperature=0,
-            max_tokens=32,
             logprobs=logprobs is not None and logprobs > 0,
             top_logprobs=logprobs,
             n=parallel_sample_num,
@@ -178,7 +180,6 @@ class TestOpenAIServer(unittest.TestCase):
                 {"role": "user", "content": "What is the capital of France?"},
             ],
             temperature=0,
-            max_tokens=32,
             logprobs=logprobs is not None and logprobs > 0,
             top_logprobs=logprobs,
             stream=True,

test/srt/test_vision_openai_server.py

@@ -46,25 +46,71 @@ class TestOpenAIVisionServer(unittest.TestCase):
                         {
                             "type": "image_url",
                             "image_url": {
-                                "url": "https://github.com/sgl-project/sglang/blob/main/assets/logo.png?raw=true"
+                                "url": "https://github.com/sgl-project/sglang/blob/main/test/lang/example_image.png?raw=true"
                             },
                         },
-                        {"type": "text", "text": "Describe this image"},
+                        {
+                            "type": "text",
+                            "text": "Describe this image in a very short sentence.",
+                        },
                     ],
                 },
             ],
             temperature=0,
-            max_tokens=32,
         )
 
         assert response.choices[0].message.role == "assistant"
-        assert isinstance(response.choices[0].message.content, str)
+        text = response.choices[0].message.content
+        assert isinstance(text, str)
+        assert "car" in text or "taxi" in text, text
         assert response.id
         assert response.created
         assert response.usage.prompt_tokens > 0
         assert response.usage.completion_tokens > 0
         assert response.usage.total_tokens > 0
 
+    def test_regex(self):
+        client = openai.Client(api_key=self.api_key, base_url=self.base_url)
+
+        regex = (
+            r"""\{\n"""
+            + r"""   "color": "[\w]+",\n"""
+            + r"""   "number_of_cars": [\d]+\n"""
+            + r"""\}"""
+        )
+
+        response = client.chat.completions.create(
+            model="default",
+            messages=[
+                {
+                    "role": "user",
+                    "content": [
+                        {
+                            "type": "image_url",
+                            "image_url": {
+                                "url": "https://github.com/sgl-project/sglang/blob/main/test/lang/example_image.png?raw=true"
+                            },
+                        },
+                        {
+                            "type": "text",
+                            "text": "Describe this image in the JSON format.",
+                        },
+                    ],
+                },
+            ],
+            temperature=0,
+            extra_body={"regex": regex},
+        )
+        text = response.choices[0].message.content
+
+        try:
+            js_obj = json.loads(text)
+        except (TypeError, json.decoder.JSONDecodeError):
+            print("JSONDecodeError", text)
+            raise
+        assert isinstance(js_obj["color"], str)
+        assert isinstance(js_obj["number_of_cars"], int)
+
 
 if __name__ == "__main__":
     unittest.main(warnings="ignore")