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// If x is NaN, the result is NaN.
assertEq(Math.sign(NaN), NaN);
// If x is −0, the result is −0.
assertEq(Math.sign(-0), -0);
// If x is +0, the result is +0.
assertEq(Math.sign(+0), +0);
// If x is negative and not −0, the result is −1.
assertEq(Math.sign(-Number.MIN_VALUE), -1);
assertEq(Math.sign(-Number.MAX_VALUE), -1);
assertEq(Math.sign(-Infinity), -1);
for (var i = -1; i > -20; i--)
assertEq(Math.sign(i), -1);
assertEq(Math.sign(-1e-300), -1);
assertEq(Math.sign(-0x80000000), -1);
// If x is positive and not +0, the result is +1.
assertEq(Math.sign(Number.MIN_VALUE), +1);
assertEq(Math.sign(Number.MAX_VALUE), +1);
assertEq(Math.sign(Infinity), +1);
for (var i = 1; i < 20; i++)
assertEq(Math.sign(i), +1);
assertEq(Math.sign(+1e-300), +1);
assertEq(Math.sign(0x80000000), +1);
assertEq(Math.sign(0xffffffff), +1);
reportCompare(0, 0, "ok");
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