fix: single load in remove, use dataclasses.replace in config_cmd, add remove-running test

tests/unit/test_cli_config.py

@@ -1,7 +1,10 @@
+import os
 import pytest
+from datetime import datetime, timezone
 from click.testing import CliRunner
 from autossh_mgr.cli import cli
 from autossh_mgr.config import load_tunnels, save_tunnels
+from autossh_mgr.process import write_pid_file
 
 
 @pytest.fixture(autouse=True)
@@ -126,3 +129,12 @@ def test_config_invalid_type(runner, config_dir, sample_tunnel):
     save_tunnels(config_dir, [sample_tunnel])
     result = runner.invoke(cli, ["config", "web-service", "port", "notanumber"])
     assert result.exit_code != 0
+
+
+def test_remove_running_tunnel_fails(runner, config_dir, sample_tunnel):
+    save_tunnels(config_dir, [sample_tunnel])
+    write_pid_file(config_dir, "web-service", os.getpid(), datetime.now(timezone.utc))
+    result = runner.invoke(cli, ["remove", "web-service"], input="y\n")
+    assert result.exit_code != 0
+    assert "Stop" in result.output
+    assert len(load_tunnels(config_dir)) == 1