✅ Add test for warnings

tests/test_pydantic_v1_deprecation_warnings.py

@@ -0,0 +1,77 @@
+import sys
+
+import pytest
+
+from tests.utils import skip_module_if_py_gte_314
+
+if sys.version_info >= (3, 14):
+    skip_module_if_py_gte_314()
+
+from fastapi import FastAPI
+from fastapi._compat.v1 import BaseModel
+
+
+def test_warns_pydantic_v1_model_in_endpoint_param() -> None:
+    class ParamModelV1(BaseModel):
+        name: str
+
+    app = FastAPI()
+
+    with pytest.warns(
+        DeprecationWarning,
+        match=r"pydantic\.v1 is deprecated.*Please update the param data:",
+    ):
+
+        @app.post("/param")
+        def endpoint(data: ParamModelV1):
+            return data
+
+
+def test_warns_pydantic_v1_model_in_return_type() -> None:
+    class ReturnModelV1(BaseModel):
+        name: str
+
+    app = FastAPI()
+
+    with pytest.warns(
+        DeprecationWarning,
+        match=r"pydantic\.v1 is deprecated.*Please update the response model",
+    ):
+
+        @app.get("/return")
+        def endpoint() -> ReturnModelV1:
+            return ReturnModelV1(name="test")
+
+
+def test_warns_pydantic_v1_model_in_response_model() -> None:
+    class ResponseModelV1(BaseModel):
+        name: str
+
+    app = FastAPI()
+
+    with pytest.warns(
+        DeprecationWarning,
+        match=r"pydantic\.v1 is deprecated.*Please update the response model",
+    ):
+
+        @app.get("/response-model", response_model=ResponseModelV1)
+        def endpoint():
+            return {"name": "test"}
+
+
+def test_warns_pydantic_v1_model_in_additional_responses_model() -> None:
+    class ErrorModelV1(BaseModel):
+        detail: str
+
+    app = FastAPI()
+
+    with pytest.warns(
+        DeprecationWarning,
+        match=r"pydantic\.v1 is deprecated.*In responses=\{\}, please update",
+    ):
+
+        @app.get(
+            "/responses", response_model=None, responses={400: {"model": ErrorModelV1}}
+        )
+        def endpoint():
+            return {"ok": True}