test(cli): ✅ add tests for prune command

add tests for prune command and some code optimization and formatting.

tests/conftest.py

@@ -34,6 +34,17 @@ def tmp_setup_logging(tmp_log_file):
     setup_logging(file_path=tmp_log_file)
 
 
+@pytest.fixture(autouse=True)
+def tmp_cli_logging(monkeypatch, tmp_path):
+    """Keep the CLI callback from writing run logs into the project `output/logs`.
+
+    The callback builds `LOGGING_PATH / <timestamp>.log` on every command call,
+    so `runner.invoke()` would otherwise create a file in the working tree and
+    add two handlers to the root logger for each test.
+    """
+    monkeypatch.setattr("logwatcher.cli.LOGGING_PATH", tmp_path / "logs")
+
+
 @pytest.fixture(name="original_log_dir")
 def original_log_dir_fixture() -> Path:
     """Return log directory containing real logs.

tests/test_cli.py

@@ -9,6 +9,8 @@ from unittest.mock import MagicMock
 
 from logwatcher import __version__
 from logwatcher.cli import _get_files_from_dir, app
+from logwatcher.config import RESULT_PATH
+from logwatcher.utils import is_log_file
 
 runner = CliRunner()
 
@@ -35,9 +37,7 @@ def get_argument_from_files(log_dir: Path, output_path: Path) -> list[str]:
         List of arguments in string format
 
     """
-    files = [
+    files = [str(file) for file in log_dir.iterdir() if is_log_file(file)]
-        str(file) for file in log_dir.iterdir() if file.suffix in ("", ".txt", ".log")
-    ]
 
     arguments = ["from-files", "--output-dir", str(output_path)]
     for file in files:
@@ -384,24 +384,28 @@ def test_cli_from_files_valid_logs(output_path: Path, valid_log_dir: Path):
 def test_cli_from_mails_no_output_dir(monkeypatch, make_mock_account):
     """Assert everything works when no output_path is provided.
 
-    Must use "output/" directory, located in project root.
+    Must use `RESULT_PATH` as the default output directory.
     """
     messages = [
         Message(subject="subject test 1", text_body="body test 1"),
         Message(subject="subject test 2", text_body="body test 2"),
         Message(subject="subject test 3", text_body="body test 3"),
     ]
+    write_log_report_mock = MagicMock()
 
     with monkeypatch.context() as m:
         m.setattr(
             "logwatcher.cli.connect_to_mailbox",
             lambda: make_mock_account(messages=messages, analyzed_folder="Analyzed"),
         )
-        m.setattr("logwatcher.notifier.Message.send", MagicMock(return_value=None))
+        m.setattr("logwatcher.cli.write_log_report", write_log_report_mock)
+        m.setattr("logwatcher.cli.send_n2_report", MagicMock())
 
         arguments = ["from-mails"]
         results = runner.invoke(app, arguments)
-        assert results.exit_code == 0
+
+    assert results.exit_code == 0
+    assert write_log_report_mock.call_args.kwargs["output_dir"] == RESULT_PATH
 
 
 def test_cli_from_mails_invalid_output_dir(tmp_path, monkeypatch):
@@ -465,3 +469,72 @@ def test_cli_from_mails_valid_output_dir(tmp_path, monkeypatch, make_mock_accoun
     assert len(output_children) == len(expected)
     for name in expected:
         assert name in file_names
+
+
+def test_prune_help_lists_targets():
+    """Assert the prune command lists both of its targets."""
+    results = runner.invoke(app, ["prune", "--help"])
+
+    assert results.exit_code == 0
+    assert "--mails" in results.output
+    assert "--logs" in results.output
+
+
+def test_prune_without_target_raises():
+    """Assert that prune without any target is rejected."""
+    results = runner.invoke(app, ["prune"])
+
+    assert results.exit_code == 2
+    assert "At least one of --mails or --logs must be provided." in results.output
+
+
+def test_prune_logs_only(monkeypatch):
+    """Assert `--logs` prunes logs only, without connecting to the mailbox."""
+    connect_mock = MagicMock()
+    prune_mails_mock = MagicMock()
+    get_logs_mock = MagicMock(return_value=[MagicMock()])
+    archive_logs_mock = MagicMock()
+    prune_logs_mock = MagicMock()
+
+    with monkeypatch.context() as m:
+        m.setattr("logwatcher.cli.connect_to_mailbox", connect_mock)
+        m.setattr("logwatcher.cli.prune_mails", prune_mails_mock)
+        m.setattr("logwatcher.cli.get_logs_to_archive", get_logs_mock)
+        m.setattr("logwatcher.cli.archive_logs", archive_logs_mock)
+        m.setattr("logwatcher.cli.prune_logs", prune_logs_mock)
+
+        results = runner.invoke(app, ["prune", "--logs"])
+
+    assert results.exit_code == 0
+    get_logs_mock.assert_called_once()
+    archive_logs_mock.assert_called_once()
+    prune_logs_mock.assert_called_once()
+    connect_mock.assert_not_called()
+    prune_mails_mock.assert_not_called()
+
+
+def test_prune_mails_only(monkeypatch):
+    """Assert `--mails` prunes mails only, without touching log archives."""
+    fake_account = MagicMock()
+    connect_mock = MagicMock(return_value=fake_account)
+    prune_mails_mock = MagicMock()
+    get_logs_mock = MagicMock()
+    archive_logs_mock = MagicMock()
+    prune_logs_mock = MagicMock()
+
+    with monkeypatch.context() as m:
+        m.setattr("logwatcher.cli.connect_to_mailbox", connect_mock)
+        m.setattr("logwatcher.cli.prune_mails", prune_mails_mock)
+        m.setattr("logwatcher.cli.get_logs_to_archive", get_logs_mock)
+        m.setattr("logwatcher.cli.archive_logs", archive_logs_mock)
+        m.setattr("logwatcher.cli.prune_logs", prune_logs_mock)
+
+        results = runner.invoke(app, ["prune", "--mails"])
+
+    assert results.exit_code == 0
+    connect_mock.assert_called_once()
+    prune_mails_mock.assert_called_once()
+    assert prune_mails_mock.call_args.args[1] is fake_account
+    get_logs_mock.assert_not_called()
+    archive_logs_mock.assert_not_called()
+    prune_logs_mock.assert_not_called()

tests/test_mail_reader.py

@@ -114,9 +114,6 @@ class OkAccount:
         self.protocol = OkProtocol()
 
 
-#########################################
-# _find_log_attachment #
-#########################################
 def test_find_log_attachment_returns_log_file(
     empty_mail: Message,
 ):
@@ -221,9 +218,6 @@ def test_find_log_attachment_rejects_non_file_attachment(empty_mail: Message):
     assert attachment is None
 
 
-############################
-# _get_attachment_content #
-############################
 def test_get_attachment_content_decodes_windows_1252(original_log_dir: Path):
     """Decodes content with accents correctly."""
     file_with_accents = original_log_dir / "CR_20260727110008.txt"
@@ -249,9 +243,6 @@ def test_get_attachment_content_empty_bytes():
     assert content == ""
 
 
-########################
-# _get_mail_body(mail) #
-########################
 def test_get_mail_body_from_marker_to_end(empty_mail: Message):
     """Returns body starting at 'Répertoire scanné'."""
     empty_mail.text_body += "Répertoire scanné : \\192.168.60.40\\e$\\MDC_1110\\Logs"
@@ -291,9 +282,6 @@ def test_get_mail_body_multiple_markers(empty_mail: Message):
     assert "Répertoire scanné\nRépertoire scanné\nRépertoire scanné" == content
 
 
-################################
-# _has_attachment_marker(body) #
-################################
 def test_has_attachment_marker_true():
     """Returns True when the exact pattern is present."""
     body_with_pattern = "Compte-rendu du suivi des imports NOSYMAG du 02/09/2026 à 15:00:10\n\nLe compte-rendu contient plus de 100 lignes.\nSe reporter à la pièce jointe."
@@ -318,9 +306,6 @@ def test_has_attachment_marker_empty_string():
     assert not _has_attachment_marker(body_empty)
 
 
-########################
-# connect_to_mailbox() #
-########################
 def test_connect_to_mailbox_success(monkeypatch: MonkeyPatch, caplog, set_env):
     """Returns an Account when credentials are valid."""
     with monkeypatch.context() as m, caplog.at_level(logging.INFO, "logwatcher"):

tests/test_reporter.py

@@ -235,7 +235,7 @@ def _test_write_log_report(
         SourceType.FILE,
         relevant,
         irrelevant,
-        datetime.now(FRENCH_TIMEZONE).strftime(DATETIME_FORMAT),
+        today,
         start_date,
         end_date,
         nb_files,