fix(frontend): return 400 for missing completions json_schema (#28090)

Signed-off-by: Ting Sun <suntcrick@gmail.com>
2026-06-22 15:47:05 -07:00
parent 6c212a5d6b
commit e00703bb2a
2 changed files with 18 additions and 3 deletions
@@ -140,6 +140,17 @@ class ServingCompletionTestCase(unittest.TestCase):
        self.assertIn("json_schema", sampling_params)
        self.assertIsInstance(sampling_params["json_schema"], str)

+    def test_response_format_json_schema_missing_schema(self):
+        """Test that json_schema response_format without a schema raises a ValueError."""
+        req = CompletionRequest(
+            model="x",
+            prompt="Generate a JSON object:",
+            max_tokens=100,
+            response_format={"type": "json_schema"},
+        )
+        with self.assertRaises(ValueError):
+            self.sc._build_sampling_params(req)
+
    def test_response_format_structural_tag(self):
        """Test that response_format structural_tag is correctly processed in sampling params."""
        req = CompletionRequest(