Fix coverage for `docs_src.debugging.tutorial001`

tests/test_tutorial/test_debugging/test_tutorial001.py

@@ -1,4 +1,5 @@
 import importlib
+import runpy
 import sys
 import unittest
 
@@ -29,6 +30,17 @@ def test_get_root(client: TestClient):
     assert response.json() == {"hello world": "ba"}
 
 
+def test_uvicorn_run_called_when_run_as_main():  # Just for coverage
+    if sys.modules.get(MOD_NAME):
+        del sys.modules[MOD_NAME]
+    with unittest.mock.patch("uvicorn.run") as uvicorn_run_mock:
+        runpy.run_module(MOD_NAME, run_name="__main__")
+
+    uvicorn_run_mock.assert_called_once_with(
+        unittest.mock.ANY, host="0.0.0.0", port=8000
+    )
+
+
 def test_openapi_schema(client: TestClient):
     response = client.get("/openapi.json")
     assert response.status_code == 200