Telegram: enable grammY throttler and webhook tests

src/telegram/bot.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it, vi } from "vitest";
+
+const useSpy = vi.fn();
+const onSpy = vi.fn();
+const stopSpy = vi.fn();
+const apiStub = { config: { use: useSpy } };
+
+vi.mock("grammy", () => ({
+  Bot: class {
+    api = apiStub as any;
+    on = onSpy;
+    stop = stopSpy;
+    constructor(public token: string) {}
+  },
+  InputFile: class {},
+  webhookCallback: vi.fn(),
+}));
+
+const throttlerSpy = vi.fn(() => "throttler");
+
+vi.mock("@grammyjs/transformer-throttler", () => ({
+  apiThrottler: () => throttlerSpy(),
+}));
+
+import { createTelegramBot } from "./bot.js";
+
+describe("createTelegramBot", () => {
+  it("installs grammY throttler", () => {
+    createTelegramBot({ token: "tok" });
+    expect(throttlerSpy).toHaveBeenCalledTimes(1);
+    expect(useSpy).toHaveBeenCalledWith("throttler");
+  });
+});