test: add CI test validating the new varlink interface and more

test/units/TEST-74-AUX-UTILS.ask-password.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
+
+at_exit() {
+    set +e
+    systemctl stop waldo-ask-pw-agent.service
+}
+
+trap at_exit EXIT
+
+systemd-ask-password --help
+systemd-tty-ask-password-agent --list
+
+varlinkctl introspect /run/systemd/io.systemd.AskPassword
+
+# Spawn an agent that always replies all ask password requests with "waldo"
+systemd-run -u waldo-ask-pw-agent.service -p Environment=SYSTEMD_ASK_PASSWORD_AGENT_PASSWORD=waldo -p Type=notify /usr/bin/systemd-tty-ask-password-agent --watch --console=/dev/console
+assert_eq "$(systemd-ask-password --no-tty)" "waldo"
+assert_eq "$(varlinkctl call /usr/bin/systemd-ask-password io.systemd.AskPassword.Ask '{"message":"foobar"}' | jq '.passwords[0]')" "\"waldo\""