diff --git a/installation/includes/02_helpers.sh b/installation/includes/02_helpers.sh
index d2e1162f1..df9fb8a43 100644
--- a/installation/includes/02_helpers.sh
+++ b/installation/includes/02_helpers.sh
@@ -56,3 +56,79 @@ check_os_type() {
   fi
 
 }
+
+
+
+##### Test helpers
+
+# Check if the file(s) has/have the expected owner and modifications
+verify_chmod_chown() {
+    local mod_expected=$1
+    local user_expected=$2
+    local group_expected=$3
+
+    for file in "$@"
+    do
+        test ! -f ${file} && exit_on_error "ERROR: ${file} does not exists or is not a file!"
+
+        mod_actual=$(stat --format '%a' "${file}")
+        user_actual=$(stat -c '%U' "${file}")
+        group_actual=$(stat -c '%G' "${file}")
+        test ! "${mod_expected}" -eq "${mod_actual}" && exit_on_error "ERROR: ${file} actual mod (${mod_actual}) differs from expected (${mod_expected})!"
+        test ! "${user_expected}" == "${user_actual}" && exit_on_error "ERROR: ${file} actual owner (${user_actual}) differs from expected (${user_expected})!"
+        test ! "${group_expected}" == "${group_actual}" && exit_on_error "ERROR: ${file} actual group (${group_actual}) differs from expected (${group_expected})!"
+    done
+}
+
+verify_file_contains_string() {
+    local string="$1"
+    local file="$2"
+
+    if [[ ! $(grep -iw "${string}" "${file}") ]]; then
+        exit_on_error "ERROR: '${string}' not found in ${file}"
+    fi
+}
+
+check_service_state() {
+    local service="$1"
+    local desired_state="$2"
+
+    local actual_state=$(systemctl show -p ActiveState --value "${service}")
+    if [[ ! "${actual_state}" == "${desired_state}" ]]; then
+        exit_on_error "ERROR: service ${service} is not ${desired_state} (state: ${actual_state})."
+    fi
+}
+
+check_service_enablement() {
+    local service="$1"
+    local desired_enablement="$2"
+
+    local actual_enablement=$(systemctl is-enabled "${service}")
+    if [[ ! "${actual_enablement}" == "${desired_enablement}" ]]; then
+        exit_on_error "ERROR: service ${service} is not ${desired_enablement} (state: ${actual_enablement})."
+    fi
+}
+
+# Reads a textfile and returns all lines as args.
+# Does filter out comments, egg-prefixes and version suffixes
+# Arguments:
+#   1    : textfile to read
+get_args_from_file() {
+    local package_file="$1"
+    sed 's/.*#egg=//g' ${package_file} | sed -E 's/(#|=|>|<).*//g' | xargs echo
+}
+
+# Check if all passed packages are installed. Fail on first missing.
+verify_apt_packages() {
+    local packages="$@"
+
+    if [ -n "${packages}" ]; then
+        local apt_list_installed=$(apt -qq list --installed 2>/dev/null)
+        for package in ${packages}
+        do
+            if [[ ! $(echo "${apt_list_installed}" | grep -i "${package}.*installed") ]]; then
+                exit_on_error "ERROR: ${package} is not installed"
+            fi
+        done
+    fi
+}