test(archsetup): port full shell validation sweep to Testinfra (P2)

Port all ~26 post-install checks from validation.sh to pytest/Testinfra,
reaching parity before the cutover. Adds test_users, test_packages,
test_services, test_desktop, test_boot, test_keyring, and test_archsetup
(88 tests after parametrizing groups, services, timers, tools, and configs),
plus shared conftest fixtures for ZFS/NVMe/compositor/networking gating.

The shell sweep's three outcomes map cleanly: hard failures become assertions,
advisory warnings and unmet preconditions (headless compositor, slirp
networking, optional services, non-ZFS/non-NVMe hosts) become skips.

One correctness fix vs the shell sweep: check awww, not swww — archsetup
installs awww (swww's successor) and `pacman -Q swww` no longer matches.

Verified on the host: py_compile clean, pytest --collect-only green (88 tests).
The sweep against a real VM is verified by the make test run that follows.

1 files changed, 26 insertions, 0 deletions

diff --git a/scripts/testing/tests/test_archsetup.py b/scripts/testing/tests/test_archsetup.py
new file mode 100644
index 0000000..52fe3f7
--- /dev/null
+++ b/scripts/testing/tests/test_archsetup.py
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+"""Post-install checks: archsetup's own log and state markers.
+
+Parity port of validate_archsetup_log and validate_state_markers.
+"""
+
+import pytest
+
+
+EXPECTED_STATE_STEPS = 12
+
+
+@pytest.mark.attribution("archsetup")
+def test_no_errors_in_archsetup_log(host):
+    out = host.run("grep -h '^Error:' /var/log/archsetup-*.log 2>/dev/null | wc -l")
+    count = int((out.stdout.strip() or "0"))
+    assert count == 0, "archsetup log reported %d Error: lines" % count
+
+
+@pytest.mark.attribution("archsetup")
+def test_all_install_steps_completed(host):
+    out = host.run("ls /var/lib/archsetup/state/ 2>/dev/null | wc -l")
+    count = int((out.stdout.strip() or "0"))
+    assert count >= EXPECTED_STATE_STEPS, (
+        "only %d/%d install steps completed" % (count, EXPECTED_STATE_STEPS)
+    )