parse-from-tostring-methods.js

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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);