let dates = [ "0217-09-23", "+000217-09-23", "-000217-09-23", "2017-09-23", "+002017-09-23", "-002017-09-23", "+022017-09-23", "-022017-09-23", "+202017-09-23", "-202017-09-23", ]; for (let date of dates) { let d = new Date(date); let timeValue = d.valueOf(); assertEq(Number.isNaN(timeValue), false, `Cannot parse "${date}" as ISO date-only form`); // Ensure parsing the results of toString(), toUTCString(), and toISOString() // gives the same time value as required by 20.3.3.2 Date.parse. // // Additional requirement not present in ES2019 draft rev 7acacc524213058a2368b5fa751fac7ea08ba230: // The time zone offset must not contain seconds (or milliseconds) for |Date.parse(x.toString())| // to be equal to |x.valueOf()|. let tz = d.getTimezoneOffset(); if (Math.trunc(tz) === tz) { assertEq(Date.parse(d.toString()), timeValue, `Cannot parse from toString() of "${date}"`); } assertEq(Date.parse(d.toUTCString()), timeValue, `Cannot parse from toUTCString() of "${date}"`); assertEq(Date.parse(d.toISOString()), timeValue, `Cannot parse from toISOString() of "${date}"`); } if (typeof reportCompare === "function") reportCompare(true, true);