1 files changed, 26 insertions, 0 deletions
diff --git a/tests/check_generators.py b/tests/check_generators.py
new file mode 100644
index 0000000..2b92789
--- /dev/null
+++ b/tests/check_generators.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+"""Require identical generated input bytes across platforms and Perl versions."""
+
+import hashlib
+import json
+from pathlib import Path
+import subprocess
+import sys
+
+
+directory = Path(__file__).resolve().parent / "ii"
+vectors = json.loads((directory / "generator-vectors.json").read_text(encoding="utf-8"))
+for name, digest in vectors.items():
+    command = [sys.argv[1], str(directory / name / "generate.pl")]
+    outputs = []
+    for seed in ["0" * 40, "0" * 40, "1" * 40]:
+        result = subprocess.run([*command, seed, "100"], check=True, stdout=subprocess.PIPE,
+                                stderr=subprocess.PIPE, timeout=10)
+        if result.stderr:
+            raise RuntimeError(f"{name}: unexpected stderr {result.stderr!r}")
+        outputs.append(result.stdout)
+    if outputs[0] != outputs[1] or outputs[0] == outputs[2]:
+        raise RuntimeError(f"{name}: seed reproducibility failed")
+    if hashlib.sha256(outputs[0]).hexdigest() != digest:
+        raise RuntimeError(f"{name}: generated input differs from the portable test vector")
+    print(f"PASS {name}: repeatable, seed-sensitive, portable bytes")