Commit LLM generated test cases

frontend/deterministic-tests/src/tests/rapid-sync-toggle.test.ts

@@ -0,0 +1,36 @@
+import type { TestDefinition } from "../test-definition";
+
+export const rapidSyncToggleTest: TestDefinition = {
+    name: "Rapid Sync Toggle",
+    description:
+        "Client 0 creates a file, then toggles sync off and on multiple times. " +
+        "The file should eventually sync to Client 1 without deadlocks or data loss.",
+    clients: 2,
+    steps: [
+        { type: "enable-sync", client: 1 },
+
+        // Create a file while offline
+        { type: "create", client: 0, path: "stable.md", content: "must survive toggles" },
+
+        // Toggle sync on client 0 multiple times
+        { type: "enable-sync", client: 0 },
+        { type: "disable-sync", client: 0 },
+        { type: "enable-sync", client: 0 },
+        { type: "disable-sync", client: 0 },
+
+        // Final enable — this one must succeed
+        { type: "enable-sync", client: 0 },
+        { type: "sync" },
+        { type: "barrier" },
+
+        { type: "assert-exists", client: 0, path: "stable.md" },
+        { type: "assert-exists", client: 1, path: "stable.md" },
+        {
+            type: "assert-content",
+            client: 1,
+            path: "stable.md",
+            content: "must survive toggles"
+        },
+        { type: "assert-consistent" }
+    ]
+};