test: LeaderElection attempt_election + leader_call callbacks

test/aprsme/cluster/leader_election_test.exs

@@ -422,4 +422,61 @@ defmodule Aprsme.Cluster.LeaderElectionTest do
       assert new_state.election_forced
     end
   end
+
+  describe "handle_info(:attempt_election) direct callback" do
+    setup do
+      :global.unregister_name(@election_key)
+
+      on_exit(fn ->
+        :global.unregister_name(@election_key)
+      end)
+
+      :ok
+    end
+
+    test "becomes leader and persists leadership when no other registration exists" do
+      state = %LeaderElection{
+        cluster_enabled: false,
+        is_leader: false,
+        leader_node: nil
+      }
+
+      assert {:noreply, new_state} =
+               LeaderElection.handle_info(:attempt_election, state)
+
+      assert new_state.is_leader == true
+      assert new_state.leader_node == node()
+    end
+
+    test "re-confirms leadership when already registered as self" do
+      # Pre-register ourselves as the leader.
+      :global.register_name(@election_key, self())
+
+      state = %LeaderElection{
+        cluster_enabled: false,
+        is_leader: false,
+        leader_node: nil
+      }
+
+      assert {:noreply, new_state} =
+               LeaderElection.handle_info(:attempt_election, state)
+
+      assert new_state.is_leader == true
+    end
+  end
+
+  describe "handle_call callbacks" do
+    test "leader? returns state.is_leader" do
+      state = %LeaderElection{is_leader: true}
+      assert {:reply, true, ^state} = LeaderElection.handle_call(:leader?, self(), state)
+
+      state2 = %LeaderElection{is_leader: false}
+      assert {:reply, false, ^state2} = LeaderElection.handle_call(:leader?, self(), state2)
+    end
+
+    test "current_leader returns state.leader_node" do
+      state = %LeaderElection{leader_node: :node_a}
+      assert {:reply, :node_a, ^state} = LeaderElection.handle_call(:current_leader, self(), state)
+    end
+  end
 end