parse-from-tostring-methods.js (1328B)
1 // SKIP test262 export 2 // Behavior is not currently specified. 3 4 let dates = [ 5 "0217-09-23", "+000217-09-23", "-000217-09-23", 6 "2017-09-23", "+002017-09-23", "-002017-09-23", 7 "+022017-09-23", "-022017-09-23", 8 "+202017-09-23", "-202017-09-23", 9 ]; 10 11 for (let date of dates) { 12 let d = new Date(date); 13 let timeValue = d.valueOf(); 14 15 assertEq(Number.isNaN(timeValue), false, `Cannot parse "${date}" as ISO date-only form`); 16 17 // Ensure parsing the results of toString(), toUTCString(), and toISOString() 18 // gives the same time value as required by 20.3.3.2 Date.parse. 19 // 20 // Additional requirement not present in ES2019 draft rev 7acacc524213058a2368b5fa751fac7ea08ba230: 21 // The time zone offset must not contain seconds (or milliseconds) for |Date.parse(x.toString())| 22 // to be equal to |x.valueOf()|. 23 let tz = d.getTimezoneOffset(); 24 if (Math.trunc(tz) === tz) { 25 assertEq(Date.parse(d.toString()), timeValue, `Cannot parse from toString() of "${date}"`); 26 } 27 assertEq(Date.parse(d.toUTCString()), timeValue, `Cannot parse from toUTCString() of "${date}"`); 28 assertEq(Date.parse(d.toISOString()), timeValue, `Cannot parse from toISOString() of "${date}"`); 29 } 30 31 if (typeof reportCompare === "function") 32 reportCompare(true, true);