test: Aprsme.Is init/1 connect success and failure paths

test/aprsme/is_test.exs

@@ -644,6 +644,81 @@ defmodule Aprsme.IsTest do
     end
   end
 
+  describe "init/1 with real TCP connection (not :test env)" do
+    test "connects and sets up timers on successful login" do
+      {:ok, listen} = :gen_tcp.listen(0, [:binary, active: false, reuseaddr: true])
+      {:ok, port} = :inet.port(listen)
+
+      spawn_link(fn ->
+        case :gen_tcp.accept(listen, 5_000) do
+          {:ok, srv} ->
+            _ = :gen_tcp.recv(srv, 0, 1_000)
+            _ = :gen_tcp.close(srv)
+
+          _ ->
+            :ok
+        end
+      end)
+
+      original_disabled = Application.get_env(:aprsme, :disable_aprs_connection, false)
+      original_env = Application.get_env(:aprsme, :env)
+      original_server = Application.get_env(:aprsme, :aprs_is_server)
+      original_port = Application.get_env(:aprsme, :aprs_is_port)
+
+      Application.put_env(:aprsme, :disable_aprs_connection, false)
+      Application.put_env(:aprsme, :env, :dev)
+      Application.put_env(:aprsme, :aprs_is_server, ~c"127.0.0.1")
+      Application.put_env(:aprsme, :aprs_is_port, port)
+
+      try do
+        capture_log(fn ->
+          assert {:ok, state} = Aprsme.Is.init([])
+          # Socket should be set after successful connect.
+          assert state.socket
+          assert is_reference(state.timer)
+          assert is_reference(state.keepalive_timer)
+
+          # Cleanup
+          if state.socket, do: :gen_tcp.close(state.socket)
+          if state.timer, do: Process.cancel_timer(state.timer)
+          if state.keepalive_timer, do: Process.cancel_timer(state.keepalive_timer)
+        end)
+      after
+        Application.put_env(:aprsme, :disable_aprs_connection, original_disabled)
+        Application.put_env(:aprsme, :env, original_env)
+        if original_server, do: Application.put_env(:aprsme, :aprs_is_server, original_server)
+        if original_port, do: Application.put_env(:aprsme, :aprs_is_port, original_port)
+        _ = :gen_tcp.close(listen)
+      end
+    end
+
+    test "handles connect failure gracefully" do
+      original_disabled = Application.get_env(:aprsme, :disable_aprs_connection, false)
+      original_env = Application.get_env(:aprsme, :env)
+      original_server = Application.get_env(:aprsme, :aprs_is_server)
+      original_port = Application.get_env(:aprsme, :aprs_is_port)
+
+      Application.put_env(:aprsme, :disable_aprs_connection, false)
+      Application.put_env(:aprsme, :env, :dev)
+      Application.put_env(:aprsme, :aprs_is_server, ~c"127.0.0.1")
+      # Port 1 → connection refused.
+      Application.put_env(:aprsme, :aprs_is_port, 1)
+
+      try do
+        capture_log(fn ->
+          assert {:ok, state} = Aprsme.Is.init([])
+          # Connection failed — socket stays nil but state is still returned.
+          assert is_nil(state.socket)
+        end)
+      after
+        Application.put_env(:aprsme, :disable_aprs_connection, original_disabled)
+        Application.put_env(:aprsme, :env, original_env)
+        if original_server, do: Application.put_env(:aprsme, :aprs_is_server, original_server)
+        if original_port, do: Application.put_env(:aprsme, :aprs_is_port, original_port)
+      end
+    end
+  end
+
   describe "handle_info(:reconnect) when connect fails" do
     test "schedules another reconnect attempt on connection error" do
       # Port 1 should always refuse or fail — triggers the connect-error branch.