Mock, jest and time - express

Question

I read some tips on how to mock your request/response in Express framework in the blog:
https://codewithhugo.com/express-request-response-mocking/. However, I have no clue how to mock the controller below.
export const healthCheck = async (req, res, next) => {
log("debug", "healthCheck controller called");
const healthcheck = {
uptime: process.uptime(),
message: "Server is running!",
now_timestamp: Date.now()
};
try {
res.send(healthcheck);
} catch (error) {
healthcheck.message = error;
res.status(503).send();
}
};
I am glad to share my efforts below. My suspicion is that I must mock class Date as well.
import {
healthCheck
} from "../healthcheck.js";
const mockRequest = () => {
const req = {}
req.body = jest.fn().mockReturnValue(req)
req.params = jest.fn().mockReturnValue(req)
return req
};
const mockResponse = () => {
const res = {}
res.get = jest.fn().mockReturnValue(res)
res.send = jest.fn().mockReturnValue(res)
res.status = jest.fn().mockReturnValue(res)
res.json = jest.fn().mockReturnValue(res)
return res
};
const mockNext = () => {
return jest.fn()
};
describe("healthcheck", () => {
afterEach(() => {
// restore the spy created with spyOn
jest.restoreAllMocks();
});
it("should call mocked log for invalid from scaler", async () => {
let req = mockRequest();
let res = mockResponse();
let next = mockNext();
await healthCheck(req, res, next);
expect(res.send).toHaveBeenCalledTimes(1)
expect(res.send.mock.calls.length).toBe(1);
});
});