tests: Fix CLI tests, auto-clean temp files

tests/conftest.py

@@ -8,6 +8,7 @@
 import subprocess
 import sys
 import time
+from contextlib import suppress
 from pathlib import Path
 from typing import Iterator
 
@@ -231,21 +232,22 @@ def destroy(self, *, force: bool = False) -> None:
 
 
 ports_file = Path(".ports.json")
+lock_dir = Path(".lockdir")
 
 
 def get_lock() -> None:
-    lockdir = Path(".lockdir")
     while True:
         try:
-            lockdir.mkdir(exist_ok=False)
+            lock_dir.mkdir(exist_ok=False)
         except FileExistsError:
             time.sleep(0.025)
         else:
             break
 
 
 def release_lock() -> None:
-    Path(".lockdir").rmdir()
+    with suppress(FileNotFoundError):
+        lock_dir.rmdir()
 
 
 def get_random_port() -> int:
@@ -296,3 +298,9 @@ def port() -> Iterator[int]:
 def server(tmp_path: Path, port: int) -> Iterator[Aria2Server]:
     with Aria2Server(tmp_path, port) as server:
         yield server
+
+
+@pytest.fixture(scope="session", autouse=True)
+def _setup() -> None:
+    ports_file.unlink(missing_ok=True)
+    release_lock()

tests/test_cli.py

@@ -303,4 +303,4 @@ def test_show_debug_info(capsys: pytest.CaptureFixture) -> None:
 @pytest.mark.parametrize("command", ["autoclear", "autopurge", "autoremove"])
 def test_cli_autoclear_commands(command: str, tmp_path: Path, port: int) -> None:
     with Aria2Server(tmp_path, port, session="very-small-download.txt"):
-        assert main([command]) == 0
+        assert main([f"-p{port}", command]) == 0