1 files changed, 28 insertions, 0 deletions
diff --git a/tests/drivers/hold_test.py b/tests/drivers/hold_test.py
new file mode 100644
index 0000000..1f6ea39
--- /dev/null
+++ b/tests/drivers/hold_test.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+# hold blocks (spec 4.16): accepted programs print what their first line expects, rejected
+# ones report the error their first line names (exit 1), and trapping ones stop with
+# exit 2 and the message named.  usage: hold_test.py [VM]
+from pathlib import Path
+import subprocess, sys
+root = Path(__file__).resolve().parents[2]
+vm = sys.argv[1] if len(sys.argv) > 1 else 'build/bin/zy'
+count = bad = 0
+for case in sorted((root / 'tests/hold').glob('*/*.zc')):
+    src = case.read_text(); first = src.splitlines()[0]
+    p = subprocess.run([str(root / vm) if not Path(vm).is_absolute() else vm], input=src, text=True, capture_output=True, cwd=root, timeout=60)
+    out = p.stdout + p.stderr
+    if first.startswith('// expect: '):
+        ok = p.returncode == 0 and p.stdout.strip() == first[11:].strip()
+    elif first.startswith('// error: '):
+        ok = p.returncode == 1 and first[10:].strip() in out
+    elif first.startswith('// trap: '):
+        ok = p.returncode == 2 and first[9:].strip() in out
+    else:
+        ok = False
+    count += 1
+    if not ok:
+        bad += 1; print(f'FAIL {case.relative_to(root)}: rc={p.returncode} out={out[:300]!r}')
+    else:
+        print(f'ok   {case.relative_to(root)}')
+print(f'{count - bad}/{count} hold fixtures passed')
+sys.exit(1 if bad or not count else 0)