shared/dayStringToDate.test.ts
import { dayStringToDate } from "./dayStringToDate";
it.each([
["20211122", "2021-11-22"],
["20201031", "2020-10-31"],
])("for %s returns date object on %s", (day, expected) => {
const date = dayStringToDate(day);
expect(date.toISOString()).toContain(expected);
});