test: add initial structure for the common integration tests.

- Add bats common helpers.
- Add a first set of tests for some simple program.

tests/bats/aa-status.bats

@@ -0,0 +1,40 @@
+#!/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
+
+setup_file() {
+    aa_setup
+}
+
+# bats test_tags=aa-status
+@test "aa-status: Check status" {
+    sudo aa-status
+    aa_check
+}
+
+# bats test_tags=aa-status
+@test "aa-status: Display the number of loaded policies" {
+    sudo aa-status --profiled
+    aa_check
+}
+
+# bats test_tags=aa-status
+@test "aa-status: Display the number of loaded enforicing policies" {
+    sudo aa-status --enforced
+    aa_check
+}
+
+# bats test_tags=aa-status
+@test "aa-status: Display the number of loaded non-enforcing policies" {
+    sudo aa-status --complaining
+    aa_check
+}
+
+# bats test_tags=aa-status
+@test "aa-status: Display the number of loaded enforcing policies that kill tasks" {
+    sudo aa-status --kill
+    aa_check
+}