From 8cedb742cb59f72a752bb0a6b4f73c02aeb15bf6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Ram=C3=ADrez?= <tiangolo@gmail.com>
Date: Tue, 9 Dec 2025 03:12:24 -0800
Subject: [PATCH] =?UTF-8?q?=E2=9C=85=20Add=20test=20for=20Pydantic=20v2,?=
 =?UTF-8?q?=20dataclasses,=20UUID,=20and=20`=5F=5Fannotations=5F=5F`=20(#1?=
 =?UTF-8?q?4477)?=
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---
 ...ataclasses_uuid_stringified_annotations.py | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 tests/test_pydanticv2_dataclasses_uuid_stringified_annotations.py

diff --git a/tests/test_pydanticv2_dataclasses_uuid_stringified_annotations.py b/tests/test_pydanticv2_dataclasses_uuid_stringified_annotations.py
new file mode 100644
index 000000000..c9f94563b
--- /dev/null
+++ b/tests/test_pydanticv2_dataclasses_uuid_stringified_annotations.py
@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+import uuid
+from dataclasses import dataclass, field
+from typing import List, Union
+
+from dirty_equals import IsUUID
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+from inline_snapshot import snapshot
+
+
+@dataclass
+class Item:
+    id: uuid.UUID
+    name: str
+    price: float
+    tags: List[str] = field(default_factory=list)
+    description: Union[str, None] = None
+    tax: Union[float, None] = None
+
+
+app = FastAPI()
+
+
+@app.get("/item", response_model=Item)
+async def read_item():
+    return {
+        "id": uuid.uuid4(),
+        "name": "Island In The Moon",
+        "price": 12.99,
+        "description": "A place to be be playin' and havin' fun",
+        "tags": ["breater"],
+    }
+
+
+client = TestClient(app)
+
+
+def test_annotations():
+    response = client.get("/item")
+    assert response.status_code == 200, response.text
+    assert response.json() == snapshot(
+        {
+            "id": IsUUID(),
+            "name": "Island In The Moon",
+            "price": 12.99,
+            "tags": ["breater"],
+            "description": "A place to be be playin' and havin' fun",
+            "tax": None,
+        }
+    )