test: add coverage for ExpiredBanCleanupWorker

7 tests exercising perform/1: expired/active/permanent ban handling,
mixed scenarios, empty database, and PubSub broadcast behavior.

CHANGELOG.txt

@@ -1,6 +1,12 @@
 CHANGELOG - towerops-web
 ========================
 
+2026-02-11 - test: add 100% coverage for ExpiredBanCleanupWorker
+  - File: test/towerops/workers/expired_ban_cleanup_worker_test.exs (new)
+    Added 7 tests covering perform/1: expired ban deletion, active ban preservation,
+    permanent ban preservation, mixed scenarios, empty database, PubSub broadcast
+    on deletion, and no broadcast when nothing deleted.
+
 2026-02-11 - fix: handle "null" string values in SNMP parsing
   - File: lib/towerops/snmp/profiles/base.ex (parse_integer/1, parse_float/1)
     Added explicit handling for "null" string values before attempting integer/float

test/towerops/workers/expired_ban_cleanup_worker_test.exs

@@ -0,0 +1,108 @@
+defmodule Towerops.Workers.ExpiredBanCleanupWorkerTest do
+  use Towerops.DataCase, async: false
+
+  alias Towerops.Security.IpBlock
+  alias Towerops.Workers.ExpiredBanCleanupWorker
+
+  describe "perform/1" do
+    test "deletes expired temporary bans" do
+      insert_ip_block(%{
+        ip_address: "10.0.0.1",
+        banned_until: DateTime.add(DateTime.utc_now(), -60, :second)
+      })
+
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+
+      assert [] = Repo.all(IpBlock)
+    end
+
+    test "keeps active temporary bans" do
+      block =
+        insert_ip_block(%{
+          ip_address: "10.0.0.2",
+          banned_until: DateTime.add(DateTime.utc_now(), 300, :second)
+        })
+
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+
+      assert Repo.get(IpBlock, block.id)
+    end
+
+    test "keeps permanent bans" do
+      block =
+        insert_ip_block(%{
+          ip_address: "10.0.0.3",
+          offense_count: 3,
+          banned_until: nil
+        })
+
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+
+      assert Repo.get(IpBlock, block.id)
+    end
+
+    test "deletes only expired bans among mixed records" do
+      expired =
+        insert_ip_block(%{
+          ip_address: "10.0.0.10",
+          banned_until: DateTime.add(DateTime.utc_now(), -120, :second)
+        })
+
+      active =
+        insert_ip_block(%{
+          ip_address: "10.0.0.11",
+          banned_until: DateTime.add(DateTime.utc_now(), 600, :second)
+        })
+
+      permanent =
+        insert_ip_block(%{
+          ip_address: "10.0.0.12",
+          offense_count: 3,
+          banned_until: nil
+        })
+
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+
+      refute Repo.get(IpBlock, expired.id)
+      assert Repo.get(IpBlock, active.id)
+      assert Repo.get(IpBlock, permanent.id)
+    end
+
+    test "returns :ok when no records exist" do
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+    end
+
+    test "broadcasts to PubSub when bans are deleted" do
+      Phoenix.PubSub.subscribe(Towerops.PubSub, "security:blocks")
+
+      insert_ip_block(%{
+        ip_address: "10.0.0.20",
+        banned_until: DateTime.add(DateTime.utc_now(), -60, :second)
+      })
+
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+
+      assert_receive :blocks_updated
+    end
+
+    test "does not broadcast to PubSub when nothing is deleted" do
+      Phoenix.PubSub.subscribe(Towerops.PubSub, "security:blocks")
+
+      assert :ok = ExpiredBanCleanupWorker.perform(%Oban.Job{args: %{}})
+
+      refute_receive :blocks_updated
+    end
+  end
+
+  defp insert_ip_block(attrs) do
+    defaults = %{
+      offense_count: 1,
+      last_violation_at: DateTime.utc_now(),
+      reason: "test ban"
+    }
+
+    %IpBlock{}
+    |> IpBlock.changeset(Map.merge(defaults, attrs))
+    |> Repo.insert!()
+  end
+end