Add module integration tests

tests/mods/01-test-modules.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -e
+set -u
+set -o pipefail
+
+CWD="$(cd -P -- "$(dirname -- "$0")" && pwd -P)"
+
+IMAGE="${1}"
+VERSION="${2}"
+FLAVOUR="${3}"
+
+
+# shellcheck disable=SC1090
+. "${CWD}/../.lib.sh"
+
+
+# -------------------------------------------------------------------------------------------------
+# Testing
+# -------------------------------------------------------------------------------------------------
+
+ERROR=0
+for dir in $( ls -1 "${CWD}/modules/" ); do
+	if ! "${CWD}/modules.sh" "${IMAGE}" "${VERSION}" "${FLAVOUR}" "${dir}"; then
+		ERROR="$(( ERROR + 1 ))"
+	fi
+done
+
+exit "${ERROR}"