test(whatsapp): cover UTF-16-safe echo previews

steipete · steipete · commit 9a014cfad4e4 · 2026-07-09T11:30:56.000+01:00
diff --git a/extensions/whatsapp/src/auto-reply/monitor/echo.test.ts b/extensions/whatsapp/src/auto-reply/monitor/echo.test.ts
@@ -0,0 +1,18 @@
+import { describe, expect, it, vi } from "vitest";
+import { createEchoTracker } from "./echo.js";
+
+describe("createEchoTracker", () => {
+  it("keeps verbose previews UTF-16 safe without changing the tracked text", () => {
+    const logVerbose = vi.fn();
+    const tracker = createEchoTracker({ logVerbose });
+    const prefix = "x".repeat(49);
+    const text = `${prefix}😀tail`;
+
+    tracker.rememberText(text, { logVerboseMessage: true });
+
+    expect(logVerbose).toHaveBeenCalledExactlyOnceWith(
+      `Added to echo detection set (size now: 1): ${prefix}...`,
+    );
+    expect(tracker.has(text)).toBe(true);
+  });
+});
