test: Add userspace tests

tests/run.py

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: ISC
+
+import os
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+
+NOISE_RE = re.compile(r"\x1b\[[0-9;]*m|\r|^\[[ \d.]+\] (?:syslog\(\w+\): )?")
+PLAN_RE = re.compile(r"^1\.\.\d+")
+TAP_RE = re.compile(r"^(?:ok|not ok|#|1\.\.\d+|Bail out!)")
+
+sep = sys.argv.index("--")
+with tempfile.TemporaryDirectory(prefix="zinnia-esp-") as esp:
+    for spec in sys.argv[1:sep]:
+        src, dest = spec.split("=", 1)
+        path = os.path.join(esp, dest)
+        os.makedirs(os.path.dirname(path), exist_ok=True)
+        shutil.copyfile(src, path)
+
+    proc = subprocess.Popen(
+        sys.argv[sep + 1 :] + ["-drive", f"format=raw,file=fat:{esp},if=virtio,readonly=on"],
+        stdin=subprocess.DEVNULL,
+        stdout=subprocess.PIPE,
+        text=True,
+        errors="replace",
+    )
+    for line in proc.stdout:
+        line = NOISE_RE.sub("", line).rstrip()
+        print(line if TAP_RE.match(line) else f"# {line}", flush=True)
+        if PLAN_RE.match(line):
+            proc.kill()
+            proc.wait()
+            sys.exit(0)
+    proc.wait()
+sys.exit(1)