Add email delivery check command

tests/test_cli.py

@@ -41,6 +41,12 @@ def test_cli_has_dump_pbs_users() -> None:
     assert args.dump_pbs_users is True
 
 
+def test_cli_has_check_email() -> None:
+    args = build_parser().parse_args(["--check-email"])
+
+    assert args.check_email is True
+
+
 def test_dump_report_data_does_not_export_sensitive_raw_fields(
     monkeypatch,
     capsys,
@@ -246,3 +252,39 @@ def test_generate_pdf_sends_email_when_enabled(tmp_path, monkeypatch) -> None:
 
     assert run(["--generate-pdf"]) == 0
     assert sent == [("smtp.example.invalid", pdf_path)]
+
+
+def test_check_email_sends_test_email(monkeypatch) -> None:
+    config = AppConfig(
+        pve_api_url="https://pve.example.invalid:8006",
+        pve_api_token_id="backup-report@pve!report",
+        pve_api_token_secret="secret",
+        report_output_dir=Path("reports"),
+        report_timezone="Europe/Paris",
+        pve_verify_tls=True,
+        pve_ca_bundle=None,
+        pve_timeout_seconds=30,
+        pve_backup_jobs_endpoint="/cluster/backup",
+        pve_task_history_limit=500,
+        pve_task_log_limit=5000,
+        pbs_hostnames={},
+        pbs_servers=(),
+        log_level="INFO",
+        report_filename_prefix="rapport-sauvegardes-pve",
+        email=EmailConfig(
+            enabled=True,
+            smtp_host="smtp.example.invalid",
+            smtp_from="report@example.invalid",
+            smtp_to=("admin@example.invalid",),
+        ),
+    )
+    sent = []
+
+    monkeypatch.setattr("pve_backup_report.cli.load_config", lambda: config)
+    monkeypatch.setattr(
+        "pve_backup_report.cli.send_test_email",
+        lambda email_config: sent.append(email_config.smtp_host),
+    )
+
+    assert run(["--check-email"]) == 0
+    assert sent == ["smtp.example.invalid"]