test: update integration tests.

tests/integration/apt/dpkg.bats

@@ -0,0 +1,27 @@
+#!/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 "dpkg: Remove a package" {
+    sudo apt install -y pass
+    sudo dpkg -r pass
+}
+
+@test "dpkg: List installed packages" {
+    dpkg -l apparmor
+}
+
+@test "dpkg: List a package's contents" {
+    dpkg -L apparmor.d
+}
+
+@test "dpkg: Find out which package owns a file" {
+    dpkg -S /etc/apparmor/parser.conf
+}
+
+@test "dpkg: Purge an installed or already removed package, including configuration" {
+    sudo dpkg -P pass
+}