Function start

__tests__/api/streamResponseToUser.test.ts:12–15

(controller)

    const uint8array = new TextEncoder().encode(mockReadable.read());
    const mockStream = new ReadableStream({
      start(controller) {
        controller.enqueue(uint8array);
        controller.close();
      },
    });
    const mockFn = jest.fn();
    // @ts-ignore