await handler(payload);

const enqueuedPayload = enqueue.mock.calls[0]?.[0];

expect(enqueue).toHaveBeenCalledTimes(1);

const [firstCall] = enqueue.mock.calls;

if (!firstCall) {

throw new Error("Expected block reply pipeline enqueue call");

}

const [enqueuedPayload] = firstCall;

if (enqueuedPayload === undefined) {

throw new Error("Expected block reply pipeline payload");

}

expect(enqueuedPayload).toEqual({

text: "Alpha",

mediaUrl: undefined,