test(opcua): add fixed candidate saturation diagnosis with observer barriers

2026-11-10 14:51:19 -05:00
parent ab35ddd3c2
commit 54a4ff2149
8 changed files with 833 additions and 13 deletions
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+"""Small negative controls for artifact tampering and VSTest's misleading skipped counter."""
+import hashlib
+import json
+from pathlib import Path
+import tempfile
+from launch_saturation import trx, verify
+
+with tempfile.TemporaryDirectory(prefix="opcua-saturation-tools-") as temporary:
+    root = Path(temporary)
+    artifact = root / "immutable"
+    artifact.write_text("control")
+    receipt = {"protocol": "sdk2-saturation-v1", "acceptance": False, "canonicalCycles": 384,
+               "completedRestarts": 96, "settlingCycles": 1, "maximumPhaseSeconds": 1800,
+               "files": {"immutable": hashlib.sha256(artifact.read_bytes()).hexdigest()}}
+    path = root / "receipt.json"
+    path.write_text(json.dumps(receipt))
+    digest = hashlib.sha256(path.read_bytes()).hexdigest()
+    verify(root, digest)
+    artifact.write_text("tampered")
+    try:
+        verify(root, digest)
+    except ValueError:
+        pass
+    else:
+        raise RuntimeError("Changed artifact was accepted")
+    xml = root / "skipped.trx"
+    xml.write_text('<TestRun xmlns="http://microsoft.com/schemas/VisualStudio/TeamTest/2010"><Results>'
+                   '<UnitTestResult outcome="NotExecuted" /></Results><ResultSummary>'
+                   '<Counters executed="1" notExecuted="0" /></ResultSummary></TestRun>')
+    try:
+        trx(xml, 1)
+    except ValueError:
+        pass
+    else:
+        raise RuntimeError("Direct skipped result was hidden by the counter")
+print("Artifact verification, tamper rejection and direct skipped-result controls passed (3/3)")