Compute PBS retention depth

tests/test_report_pdf.py

@@ -26,6 +26,7 @@ from pve_backup_report.report_pdf import format_last_backup
 from pve_backup_report.report_pdf import format_size
 from pve_backup_report.report_pdf import pbs_datastore_usage_row
 from pve_backup_report.report_pdf import pbs_access_user_row
+from pve_backup_report.report_pdf import retention_policy_depth
 from pve_backup_report.report_pdf import retention_policy_row
 from pve_backup_report.report_pdf import add_table_of_contents
 from pve_backup_report.report_pdf import unique_report_path
@@ -171,10 +172,32 @@ def test_retention_policy_row_splits_columns() -> None:
         8,
         3,
         1,
-        0,
+        "29",
     ]
 
 
+def test_retention_policy_depth_sums_keep_values() -> None:
+    policy = PbsRetentionPolicy(
+        policy_id="prune-prod",
+        server_name="PBS01",
+        keep_last=1,
+        keep_hourly=2,
+        keep_daily=14,
+        keep_weekly=8,
+        keep_monthly=3,
+        keep_yearly=1,
+        max_depth=0,
+    )
+
+    assert retention_policy_depth(policy) == 29
+
+
+def test_retention_policy_row_displays_unspecified_depth_without_keep_values() -> None:
+    policy = PbsRetentionPolicy(policy_id="prune-empty", server_name="PBS01", max_depth=0)
+
+    assert retention_policy_row(policy)[-1] == "non renseigne"
+
+
 def test_find_snapshot_summary_matches_storage_namespace_and_guest() -> None:
     guest = Guest(vmid=100, name="srv", guest_type="qemu")
     item = BackupCoverage(