Add test scenario for --uds flag when file exists (#1741)

Co-authored-by: Marcelo Trylesinski <marcelotryle@gmail.com>

setup.cfg

@@ -82,7 +82,7 @@ plugins =
 
 [coverage:report]
 precision = 2
-fail_under = 97.69
+fail_under = 97.79
 show_missing = true
 skip_covered = true
 exclude_lines =

tests/test_cli.py

@@ -91,10 +91,20 @@ def test_cli_call_multiprocess_run() -> None:
     mock_run.assert_called_once()
 
 
+@pytest.fixture(params=(True, False))
+def uds_file(
+    tmp_path: Path, request: pytest.FixtureRequest
+) -> Path:  # pragma: py-win32
+    file = tmp_path / "uvicorn.sock"
+    should_create_file = request.param
+    if should_create_file:
+        file.touch(exist_ok=True)
+    return file
+
+
 @pytest.mark.skipif(sys.platform == "win32", reason="require unix-like system")
-def test_cli_uds(tmp_path: Path) -> None:  # pragma: py-win32
+def test_cli_uds(uds_file: Path) -> None:  # pragma: py-win32
     runner = CliRunner()
-    uds_file = tmp_path / "uvicorn.sock"
 
     with mock.patch.object(Config, "bind_socket") as mock_bind_socket:
         with mock.patch.object(Multiprocess, "run") as mock_run: