/*
 *  Test that ToNumber(ToString(x)) === x, except for -0 where the sign is
 *  lost.  This is not required, but very preferable.
 */

/*---
{
    "knownissue": "rounding corner cases"
}
---*/

var values = [
    // Some basic values
    Number.NEGATIVE_INFINITY,
    -1e100,
    -98765432109876543210.9876543210,
    -123456789.01234567890123456789,
    -1, -0, 0, 1,
    123456789.01234567890123456789,
    98765432109876543210.9876543210,
    1e100,
    Number.POSITIVE_INFINITY,
    Number.NaN,

    // Random numbers generated with Node and:
    //
    // for (var i = 0; i < 1000; i++) { console.log(Math.exp(Math.random() * 200 - 100)); }

    9.47885972948749e+39,
    2.6532555092896124e-38,
    6758389328007.754,
    10628584993.157171,
    2.6387756640974324e-14,
    1.7009553077579215e+22,
    9.09378225144655e-8,
    2.570245047158704e+33,
    1.9396386619107822e-16,
    6.73978643029618e+30,
    23023475.15899063,
    2.944663902929539e+36,
    8.765212372975559e+33,
    2.0281186554367569e+30,
    3162760770626405.5,
    2.511274146889772e+28,
    8.273496767055383e+26,
    7315.408519400525,
    1.2453729136986092e+31,
    2.1488528837888795e-14,
    207831500826.3388,
    8.467475251390892e+28,
    160140468041.11798,
    2317443293048.422,
    2.626896285281776e-40,
    2.594342974576634e+35,
    2.560414490937443e-11,
    25378617.623473298,
    2.5086804709066974e+42,
    15164278368312.924,
    4.217769679901025e+22,
    137.70455950632692,
    1.0548485556959191e-15,
    7.88141881125595e-21,
    6.599780780745824e-42,
    2.322325270214259e-27,
    2.0461779359754773e-33,
    1.838590481791029,
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    1.8001999764457677e-43,
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    3.677207262793838e-14,
    1.648593206994196e-23,
    1185481181649142800,
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    4.859110177701829e-19,
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    3718356750368012.5,
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    9.22461085881936e-38,
    9.691971681128414e-13,
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    3.310318575828092e-21,
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    7.197732536389885e-43,
    1.9326708934562343e-16,
    0.004496917544921244,
    7.983458506100303e+23,
    0.31405549198915556,
    1937244739.9472232,
    2.6385092363838773e-30,
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    1.870450853361116e-35,
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    3.233972832174404e-27,
    7.079676411437938e-13,
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    23455607645329332,
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    3.625029985340905e-11,
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function sign(x) {
    if (x !== 0) { return (x < 0 ? -1 : 1); }
    if (1 / x > 0) { return 1; }
    return -1;
}

function fmt(x) {
    if (x === 0) { return (1 / x > 0 ? '0' : '-0'); }
    return String(x);
}

/* The negative zero test fails intentionally: ToString() doesn't print out
 * the sign of a negative zero.
 */
/*===
fail 5 -0 0 0
===*/

function roundTripTest() {
    var i;
    var num1, str, num2;
    var fail;

    for (i = 0; i < values.length; i++) {
        num1 = values[i];
        str = num1.toString();
        num2 = Number(str);

        // Careful when comparing: even strict equality has (-0 === 0 => true).
        // On the other hand NaNs are never equal.

        fail = false;
        if (isNaN(num1) || isNaN(num2)) {
            if (!(isNaN(num1) && isNaN(num2))) {
                fail = true;
            }
        } else if (num1 === 0 && num2 === 0) {
            if (!(sign(num1) === sign(num2))) {
                fail = true;
            }
        } else if (num1 !== num2) {
            fail = true;
        }

        if (fail) {
            print('fail', i, fmt(num1), str, fmt(num2));
        }
    }
}

try {
    roundTripTest();
} catch (e) {
    print(e.stack || e);
}