test: add tests for RuntimeDirectoryPreserve=yes

test/TEST-37-RUNTIMEDIRECTORYPRESERVE/Makefile

@@ -0,0 +1 @@
+../TEST-01-BASIC/Makefile

test/TEST-37-RUNTIMEDIRECTORYPRESERVE/test.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+set -e
+TEST_DESCRIPTION="test RuntimeDirectoryPreserve=yes"
+
+. $TEST_BASE_DIR/test-functions
+
+test_setup() {
+    create_empty_image_rootdir
+
+    (
+        LOG_LEVEL=5
+        eval $(udevadm info --export --query=env --name=${LOOPDEV}p2)
+
+        setup_basic_environment
+
+        # mask some services that we do not want to run in these tests
+        ln -fs /dev/null $initdir/etc/systemd/system/systemd-hwdb-update.service
+        ln -fs /dev/null $initdir/etc/systemd/system/systemd-journal-catalog-update.service
+        ln -fs /dev/null $initdir/etc/systemd/system/systemd-networkd.service
+        ln -fs /dev/null $initdir/etc/systemd/system/systemd-networkd.socket
+        ln -fs /dev/null $initdir/etc/systemd/system/systemd-resolved.service
+        ln -fs /dev/null $initdir/etc/systemd/system/systemd-machined.service
+
+        # setup the testsuite service
+        cat >$initdir/etc/systemd/system/testsuite.service <<EOF
+[Unit]
+Description=Testsuite service
+
+[Service]
+ExecStart=/bin/bash -x /testsuite.sh
+Type=oneshot
+StandardOutput=tty
+StandardError=tty
+EOF
+        cp testsuite.sh $initdir/
+
+        setup_testsuite
+    ) || return 1
+    setup_nspawn_root
+}
+
+do_test "$@"

test/TEST-37-RUNTIMEDIRECTORYPRESERVE/testsuite.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+set -ex
+set -o pipefail
+
+systemd-mount -p RuntimeDirectory=hoge -p RuntimeDirectoryPreserve=yes -t tmpfs tmpfs /tmp/aaa
+
+touch /run/hoge/foo
+touch /tmp/aaa/bbb
+
+systemctl restart tmp-aaa.mount
+
+test -e /run/hoge/foo
+! test -e /tmp/aaa/bbb
+
+echo OK > /testok
+
+exit 0