fix test and streamline impl

chatmaild/src/chatmaild/metrics.py

@@ -11,7 +11,7 @@ def main(vmail_dir=None):
     ci_accounts = 0
 
     for path in Path(vmail_dir).iterdir():
-        if not path.is_dir() or not (path / "cur").is_dir():
+        if not path.joinpath("cur").is_dir():
             continue
         accounts += 1
         if path.name[:3] in ("ci-", "ac_"):

chatmaild/src/chatmaild/tests/test_metrics.py

@@ -2,8 +2,15 @@ from chatmaild.metrics import main
 
 
 def test_main(tmp_path, capsys):
+    paths = []
     for x in ("ci-asllkj", "ac_12l3kj", "qweqwe", "ci-l1k2j31l2k3"):
-        tmp_path.joinpath(x).mkdir()
+        p = tmp_path.joinpath(x)
+        p.mkdir()
+        p.joinpath("cur").mkdir()
+        paths.append(p)
+
+    tmp_path.joinpath("nomailbox").mkdir()
+
     main(tmp_path)
     out, _ = capsys.readouterr()
     d = {}