tests: add a few integration tests.

tests/integration/systemd/bootctl.bats

@@ -0,0 +1,22 @@
+#!/usr/bin/env bats
+# apparmor.d - Full set of apparmor profiles
+# Copyright (C) 2025 Alexandre Pujol <alexandre@pujol.io>
+# SPDX-License-Identifier: GPL-2.0-only
+
+load ../common
+
+@test "bootctl: Show information about the system firmware and the bootloaders" {
+    sudo bootctl status
+}
+
+@test "bootctl: Show all available bootloader entries" {
+    sudo bootctl list
+}
+
+@test "bootctl: Install 'systemd-boot' into the EFI system partition" {
+    sudo bootctl install
+}
+
+@test "bootctl: Remove all installed versions of 'systemd-boot' from the EFI system partition" {
+    sudo bootctl remove
+}