| // 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"); |