From 830bc37a7297ac12b29bbbdefb9c4048139d0d9f Mon Sep 17 00:00:00 2001
From: Yurii Motov <yurii.motov.monte@gmail.com>
Date: Thu, 18 Dec 2025 10:35:57 +0100
Subject: [PATCH] Add test for `docs_src.settings.app01.main.py`

---
 .../test_tutorial/test_settings/test_app01.py | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 tests/test_tutorial/test_settings/test_app01.py

diff --git a/tests/test_tutorial/test_settings/test_app01.py b/tests/test_tutorial/test_settings/test_app01.py
new file mode 100644
index 000000000..3965a7aab
--- /dev/null
+++ b/tests/test_tutorial/test_settings/test_app01.py
@@ -0,0 +1,82 @@
+import importlib
+import sys
+
+import pytest
+from dirty_equals import IsAnyStr
+from fastapi.testclient import TestClient
+from pydantic import ValidationError
+from pytest import MonkeyPatch
+
+from ...utils import needs_pydanticv2
+
+skip_for_pydantic_v1 = needs_pydanticv2
+
+
+@pytest.fixture(
+    name="mod_name",
+    params=[
+        pytest.param("app01"),
+    ],
+)
+def get_mod_name(request: pytest.FixtureRequest):
+    return f"docs_src.settings.{request.param}.main"
+
+
+@pytest.fixture(name="client")
+def get_test_client(mod_name: str, monkeypatch: MonkeyPatch) -> TestClient:
+    if mod_name in sys.modules:
+        del sys.modules[mod_name]
+    monkeypatch.setenv("ADMIN_EMAIL", "admin@example.com")
+    main_mod = importlib.import_module(mod_name)
+    return TestClient(main_mod.app)
+
+
+def test_settings_validation_error(mod_name: str, monkeypatch: MonkeyPatch):
+    monkeypatch.delenv("ADMIN_EMAIL", raising=False)
+    if mod_name in sys.modules:
+        del sys.modules[mod_name]
+
+    with pytest.raises(ValidationError) as exc_info:
+        importlib.import_module(mod_name)
+    assert exc_info.value.errors() == [
+        {
+            "loc": ("admin_email",),
+            "msg": "Field required",
+            "type": "missing",
+            "input": {},
+            "url": IsAnyStr,
+        }
+    ]
+
+
+def test_app(client: TestClient):
+    response = client.get("/info")
+    data = response.json()
+    assert data == {
+        "app_name": "Awesome API",
+        "admin_email": "admin@example.com",
+        "items_per_user": 50,
+    }
+
+
+def test_openapi_schema(client: TestClient):
+    response = client.get("/openapi.json")
+    assert response.status_code == 200, response.text
+    assert response.json() == {
+        "openapi": "3.1.0",
+        "info": {"title": "FastAPI", "version": "0.1.0"},
+        "paths": {
+            "/info": {
+                "get": {
+                    "operationId": "info_info_get",
+                    "responses": {
+                        "200": {
+                            "description": "Successful Response",
+                            "content": {"application/json": {"schema": {}}},
+                        }
+                    },
+                    "summary": "Info",
+                }
+            }
+        },
+    }