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quickjs/tests/test_language.js  view on Meta::CPAN

    r = +2;
    assert(r, 2, "+2 === 2");

    r = 2 * 3;
    assert(r, 6, "2 * 3 === 6");

    r = 4 / 2;
    assert(r, 2, "4 / 2 === 2");

    r = 4 % 3;
    assert(r, 1, "4 % 3 === 3");

    r = 4 << 2;
    assert(r, 16, "4 << 2 === 16");

    r = 1 << 0;
    assert(r, 1, "1 << 0 === 1");

    r = 1 << 31;
    assert(r, -2147483648, "1 << 31 === -2147483648");
    
    r = 1 << 32;
    assert(r, 1, "1 << 32 === 1");
    
    r = (1 << 31) < 0;
    assert(r, true, "(1 << 31) < 0 === true");

    r = -4 >> 1;
    assert(r, -2, "-4 >> 1 === -2");

    r = -4 >>> 1;
    assert(r, 0x7ffffffe, "-4 >>> 1 === 0x7ffffffe");

    r = 1 & 1;
    assert(r, 1, "1 & 1 === 1");

    r = 0 | 1;
    assert(r, 1, "0 | 1 === 1");

    r = 1 ^ 1;
    assert(r, 0, "1 ^ 1 === 0");

    r = ~1;
    assert(r, -2, "~1 === -2");

    r = !1;
    assert(r, false, "!1 === false");

    assert((1 < 2), true, "(1 < 2) === true");

    assert((2 > 1), true, "(2 > 1) === true");

    assert(('b' > 'a'), true, "('b' > 'a') === true");

    assert(2 ** 8, 256, "2 ** 8 === 256");
}

function test_cvt()
{
    assert((NaN | 0) === 0);
    assert((Infinity | 0) === 0);
    assert(((-Infinity) | 0) === 0);
    assert(("12345" | 0) === 12345);
    assert(("0x12345" | 0) === 0x12345);
    assert(((4294967296 * 3 - 4) | 0) === -4);
    
    assert(("12345" >>> 0) === 12345);
    assert(("0x12345" >>> 0) === 0x12345);
    assert((NaN >>> 0) === 0);
    assert((Infinity >>> 0) === 0);
    assert(((-Infinity) >>> 0) === 0);
    assert(((4294967296 * 3 - 4) >>> 0) === (4294967296 - 4));
    assert((19686109595169230000).toString() === "19686109595169230000");
}

function test_eq()
{
    assert(null == undefined);
    assert(undefined == null);
    assert(true == 1);
    assert(0 == false);
    assert("" == 0);
    assert("123" == 123);
    assert("122" != 123);
    assert((new Number(1)) == 1);
    assert(2 == (new Number(2)));
    assert((new String("abc")) == "abc");
    assert({} != "abc");
}

function test_inc_dec()
{
    var a, r;
    
    a = 1;
    r = a++;
    assert(r === 1 && a === 2, true, "++");

    a = 1;
    r = ++a;
    assert(r === 2 && a === 2, true, "++");

    a = 1;
    r = a--;
    assert(r === 1 && a === 0, true, "--");

    a = 1;
    r = --a;
    assert(r === 0 && a === 0, true, "--");

    a = {x:true};
    a.x++;
    assert(a.x, 2, "++");

    a = {x:true};
    a.x--;
    assert(a.x, 0, "--");

    a = [true];
    a[0]++;
    assert(a[0], 2, "++");
    
    a = {x:true};
    r = a.x++;
    assert(r === 1 && a.x === 2, true, "++");
    
    a = {x:true};
    r = a.x--;
    assert(r === 1 && a.x === 0, true, "--");