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/lspci.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=lspci
+@test "lspci: Show a brief list of devices" {
+    lspci
+    aa_check
+}
+
+# bats test_tags=lspci
+@test "lspci: Display additional info" {
+    lspci -v
+    aa_check
+}
+
+# bats test_tags=lspci
+@test "lspci: Display drivers and modules handling each device" {
+    lspci -k
+    aa_check
+}
+
+# bats test_tags=lspci
+@test "lspci: Show a specific device" {
+    lspci -s 00:00.0
+    aa_check
+}
+
+# bats test_tags=lspci
+@test "lspci: Dump info in a readable form" {
+    lspci -vm
+    aa_check
+}