tests: add a few integration tests.

tests/integration/pacman/paccache.bats

@@ -0,0 +1,22 @@
+#!/usr/bin/env bats
+# apparmor.d - Full set of apparmor profiles
+# Copyright (C) 2024 Alexandre Pujol <alexandre@pujol.io>
+# SPDX-License-Identifier: GPL-2.0-only
+
+load ../common
+
+@test "paccache: Perform a dry-run and show the number of candidate packages for deletion" {
+    sudo paccache -d
+}
+
+@test "paccache: Move candidate packages to a directory instead of deleting them" {
+    sudo paccache -m "$USER_BUILD_DIRS"
+}
+
+@test "paccache: Remove all but the 3 most recent package versions from the `pacman` cache" {
+    sudo paccache -r
+}
+
+@test "paccache: Set the number of package versions to keep" {
+    sudo paccache -rk 3
+}