expect(convertToDate(0)).toStrictEqual(new Date('1970-01-01T00:00:00.000Z'));
expect(convertToDate(-1)).toStrictEqual(new Date('1969-12-31T23:59:59.999Z'));
const dateStr = '2020-01-01T00:00:00.000Z';
expect(convertToDate(0)).toStrictEqual(new Date('1970-01-01T00:00:00.000Z'));
expect(convertToDate(-1)).toStrictEqual(new Date('1969-12-31T23:59:59.999Z'));
const dateStr = '2020-01-01T00:00:00.000Z';