Build strict NUnit parity harness

tools/check_test_parity.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+"""Audit the checked-in NUnit-to-Rust parity catalog and source markers."""
+
+from __future__ import annotations
+
+import argparse
+from pathlib import Path
+
+from generate_surface import check_test_parity
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--root", type=Path, default=Path("."))
+    parser.add_argument("--require-reviewed", action="store_true")
+    args = parser.parse_args()
+    report = check_test_parity(args.root.resolve(), args.require_reviewed)
+    print(
+        "test parity: "
+        + ", ".join(f"{name}={count}" for name, count in report.items())
+    )
+
+
+if __name__ == "__main__":
+    main()