test: ensure ragelogger resist to JSON.stringify throws

src/settings/rageshake.test.ts

@@ -0,0 +1,34 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { expect, it } from "vitest";
+
+import { init as initRageshake } from "./rageshake";
+
+it("Logger should not crash if JSON.stringify fails", async () => {
+  // JSON.stringify can throw. We want to make sure that the logger can handle this gracefully.
+  await initRageshake();
+
+  const bigIntObj = { n: 1n };
+  const notStringifiable = {
+    bigIntObj,
+  };
+  // @ts-expect-error - we want to create an object that cannot be stringified
+  notStringifiable.foo = notStringifiable; // circular reference
+
+  // ensure this cannot be stringified
+  expect(() => JSON.stringify(notStringifiable)).toThrow();
+
+  expect(() =>
+    global.mx_rage_logger.log(
+      1,
+      "test",
+      "This is a test message",
+      notStringifiable,
+    ),
+  ).not.toThrow();
+});