michael@0: // Properties of Math.atanh that are guaranteed by the spec.
michael@0: 
michael@0: // If x is NaN, the result is NaN.
michael@0: assertEq(Math.atanh(NaN), NaN);
michael@0: 
michael@0: // If x is less than −1, the result is NaN.
michael@0: assertEq(Math.atanh(-ONE_PLUS_EPSILON), NaN);
michael@0: assertEq(Math.atanh(-Number.MAX_VALUE), NaN);
michael@0: assertEq(Math.atanh(-Infinity), NaN);
michael@0: 
michael@0: for (var i = -5; i < -1; i += 0.1)
michael@0:     assertEq(Math.atanh(i), NaN);
michael@0: 
michael@0: // If x is greater than 1, the result is NaN.
michael@0: assertEq(Math.atanh(ONE_PLUS_EPSILON), NaN);
michael@0: assertEq(Math.atanh(Number.MAX_VALUE), NaN);
michael@0: assertEq(Math.atanh(Infinity), NaN);
michael@0: 
michael@0: for (var i = +5; i > +1; i -= 0.1)
michael@0:     assertEq(Math.atanh(i), NaN);
michael@0: 
michael@0: // If x is −1, the result is −∞.
michael@0: assertEq(Math.atanh(-1), -Infinity);
michael@0: 
michael@0: // If x is +1, the result is +∞.
michael@0: assertEq(Math.atanh(+1), Infinity);
michael@0: 
michael@0: // If x is +0, the result is +0.
michael@0: assertEq(Math.atanh(+0), +0);
michael@0: 
michael@0: // If x is −0, the result is −0.
michael@0: assertEq(Math.atanh(-0), -0);
michael@0: 
michael@0: 
michael@0: reportCompare(0, 0, "ok");