in my test

    it("should list all tickets", async () => {

    const getTicket = await request(app)

        .get("/v1/ticket")

        .set("authorization", loginResponse.body.accessJWT);

    console.log(getTicket.body.result);

    console.log(getTicket.body.result[0].conversations);

    expect(getTicket.body.result).toEqual(

        expect.arrayContaining([

            expect.objectContaining({

                // _id: expect.any(String),

                // status: "pending response",

                openAt: expect.any(Date),

                conversations: expect.arrayContaining([

                    expect.objectContaining({

                        // sender: expect.any(String),

                        msgAt: expect.any(String),

                        // message: expect.any(String),

                    }),

                ]),

            }),

        ])

    );

});

});

i am checking if the value of openAt and msgAt is a date value. But the date value is saved in the string form similar to

"msgAt": "2021-12-22T08:29:15.038Z",

How to check if the value of openAt will be a date saved in a string format?