test: Enable TEST-69-SHUTDOWN for mkosi

In mkosi, we run the test inside the VM instead of outside. To simplify
the implementation we drop the reboot part and only verify that we can
schedule and cancel shutdowns and that the wall messages are sent as
expected.

mkosi.images/system/mkosi.conf.d/10-arch/mkosi.conf

@@ -41,6 +41,7 @@ Packages=
         polkit
         procps-ng
         psmisc
+        python-pexpect
         python-psutil
         quota-tools
         sbsigntools

mkosi.images/system/mkosi.conf.d/10-centos-fedora/mkosi.conf

@@ -53,6 +53,7 @@ Packages=
         policycoreutils
         polkit
         procps-ng
+        python3-pexpect
         quota
         rpm
         rpm-build

mkosi.images/system/mkosi.conf.d/10-debian-ubuntu/mkosi.conf

@@ -64,6 +64,7 @@ Packages=
         policykit-1
         procps
         psmisc
+        python3-pexpect
         python3-psutil
         quota
         sbsigntool

mkosi.images/system/mkosi.conf.d/10-opensuse/mkosi.conf

@@ -60,6 +60,7 @@ Packages=
         procps4
         psmisc
         python3-pefile
+        python3-pexpect
         python3-psutil
         quota
         rpm-build

test/TEST-69-SHUTDOWN/TEST-69-SHUTDOWN.service

@@ -5,6 +5,8 @@ Wants=basic.target multi-user.target
 After=basic.target
 Before=getty-pre.target
 
+ConditionPathExists=/usr/bin/python3
+
 [Service]
 Type=oneshot
-ExecStart=true
+ExecStart=/usr/lib/systemd/tests/testdata/units/TEST-69-SHUTDOWN.py

test/TEST-69-SHUTDOWN/meson.build

@@ -3,7 +3,6 @@
 integration_tests += [
         integration_test_template + {
                 'name' : fs.name(meson.current_source_dir()),
-                'enabled' : false,
                 'unit' : files('TEST-69-SHUTDOWN.service'),
         },
 ]

test/units/TEST-69-SHUTDOWN.py

@@ -0,0 +1,58 @@
+#!/usr/bin/python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# pylint: disable=broad-except
+
+import logging
+import sys
+
+import pexpect
+
+
+def main():
+    logger = logging.getLogger("test-shutdown")
+
+    consoles = []
+    for _ in range(2):
+        # Use script to allocate a separate pseudo tty to run the login shell in.
+        console = pexpect.spawn(
+            "script", ["--quiet", "--return", "--flush", "--command", "login -f root", "/dev/null"],
+            logfile=sys.stdout,
+            env={"TERM": "dumb"},
+            encoding="utf-8",
+            timeout=60,
+        )
+
+        logger.info("waiting for login prompt")
+        console.expect(".*# ", 10)
+
+        consoles += [console]
+
+    consoles[1].sendline("tty")
+    consoles[1].expect(r"/dev/(pts/\d+)")
+    pty = console.match.group(1)
+    logger.info("window 1 at tty %s", pty)
+
+    logger.info("schedule reboot")
+    consoles[1].sendline("shutdown -r")
+    consoles[1].expect("Reboot scheduled for (?P<date>.*), use 'shutdown -c' to cancel", 2)
+    date = consoles[1].match.group("date")
+    logger.info("reboot scheduled for %s", date)
+
+    logger.info("verify broadcast message")
+    consoles[0].expect(f"Broadcast message from root@H on {pty}", 2)
+    consoles[0].expect(f"The system will reboot at {date}!", 2)
+
+    logger.info("check show output")
+    consoles[1].sendline("shutdown --show")
+    consoles[1].expect(f"Reboot scheduled for {date}, use 'shutdown -c' to cancel", 2)
+
+    logger.info("cancel shutdown")
+    consoles[1].sendline("shutdown -c")
+    consoles[0].expect("System shutdown has been cancelled", 2)
+
+    consoles[0].sendline("> /testok")
+
+if __name__ == "__main__":
+    main()
+
+# vim: sw=4 et