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/lsblk.bats

@@ -0,0 +1,58 @@
+#!/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=lsblk
+@test "lsblk: List all storage devices in a tree-like format" {
+    lsblk
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Also list empty devices" {
+    lsblk -a
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Print the SIZE column in bytes rather than in a human-readable format" {
+    lsblk -b
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Output info about filesystems" {
+    lsblk -f
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Use ASCII characters for tree formatting" {
+    lsblk -i
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Output info about block-device topology" {
+    lsblk -t
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Exclude the devices specified by the comma-separated list of major device numbers" {
+    lsblk -e 1
+    aa_check
+}
+
+# bats test_tags=lsblk
+@test "lsblk: Display a customized summary using a comma-separated list of columns" {
+    lsblk --output NAME,SERIAL,MODEL,TRAN,TYPE,SIZE,FSTYPE,MOUNTPOINT
+    aa_check
+}