Add variants for `path-operation-advanced-configuration/tutorial004`

docs/en/docs/advanced/path-operation-advanced-configuration.md

@@ -50,7 +50,7 @@ Adding an `\f` (an escaped "form feed" character) causes **FastAPI** to truncate
 
 It won't show up in the documentation, but other tools (such as Sphinx) will be able to use the rest.
 
-{* ../../docs_src/path_operation_advanced_configuration/tutorial004.py hl[19:29] *}
+{* ../../docs_src/path_operation_advanced_configuration/tutorial004_py310.py hl[17:27] *}
 
 ## Additional Responses { #additional-responses }
 

docs_src/path_operation_advanced_configuration/tutorial004_py310.py

@@ -0,0 +1,28 @@
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+app = FastAPI()
+
+
+class Item(BaseModel):
+    name: str
+    description: str | None = None
+    price: float
+    tax: float | None = None
+    tags: set[str] = set()
+
+
+@app.post("/items/", response_model=Item, summary="Create an item")
+async def create_item(item: Item):
+    """
+    Create an item with all the information:
+
+    - **name**: each item must have a name
+    - **description**: a long description
+    - **price**: required
+    - **tax**: if the item doesn't have tax, you can omit this
+    - **tags**: a set of unique tag strings for this item
+    \f
+    :param item: User input.
+    """
+    return item

docs_src/path_operation_advanced_configuration/tutorial004_py39.py

@@ -0,0 +1,30 @@
+from typing import Union
+
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+app = FastAPI()
+
+
+class Item(BaseModel):
+    name: str
+    description: Union[str, None] = None
+    price: float
+    tax: Union[float, None] = None
+    tags: set[str] = set()
+
+
+@app.post("/items/", response_model=Item, summary="Create an item")
+async def create_item(item: Item):
+    """
+    Create an item with all the information:
+
+    - **name**: each item must have a name
+    - **description**: a long description
+    - **price**: required
+    - **tax**: if the item doesn't have tax, you can omit this
+    - **tags**: a set of unique tag strings for this item
+    \f
+    :param item: User input.
+    """
+    return item

tests/test_tutorial/test_path_operation_advanced_configurations/test_tutorial004.py

@@ -1,13 +1,30 @@
+import importlib
+
+import pytest
 from fastapi.testclient import TestClient
 
-from docs_src.path_operation_advanced_configuration.tutorial004 import app
-
-from ...utils import needs_pydanticv1, needs_pydanticv2
-
-client = TestClient(app)
+from ...utils import needs_py39, needs_py310, needs_pydanticv1, needs_pydanticv2
 
 
-def test_query_params_str_validations():
+@pytest.fixture(
+    name="client",
+    params=[
+        pytest.param("tutorial004"),
+        pytest.param("tutorial004_py39", marks=needs_py39),
+        pytest.param("tutorial004_py310", marks=needs_py310),
+    ],
+)
+def get_client(request: pytest.FixtureRequest):
+    mod = importlib.import_module(
+        f"docs_src.path_operation_advanced_configuration.{request.param}"
+    )
+
+    client = TestClient(mod.app)
+    client.headers.clear()
+    return client
+
+
+def test_query_params_str_validations(client: TestClient):
     response = client.post("/items/", json={"name": "Foo", "price": 42})
     assert response.status_code == 200, response.text
     assert response.json() == {
@@ -20,7 +37,7 @@ def test_query_params_str_validations():
 
 
 @needs_pydanticv2
-def test_openapi_schema():
+def test_openapi_schema(client: TestClient):
     response = client.get("/openapi.json")
     assert response.status_code == 200, response.text
     assert response.json() == {
@@ -123,7 +140,7 @@ def test_openapi_schema():
 
 # TODO: remove when deprecating Pydantic v1
 @needs_pydanticv1
-def test_openapi_schema_pv1():
+def test_openapi_schema_pv1(client: TestClient):
     response = client.get("/openapi.json")
     assert response.status_code == 200, response.text
     assert response.json() == {