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// Properties of Math.log1p that are guaranteed by the spec.
// If x is NaN, the result is NaN.
assertEq(Math.log1p(NaN), NaN);
// If x is less than -1, the result is NaN.
assertEq(Math.log1p(-1 - 1e-10), NaN);
assertEq(Math.log1p(-1 - 1e-5), NaN);
assertEq(Math.log1p(-1 - 1e-1), NaN);
assertEq(Math.log1p(-ONE_PLUS_EPSILON), NaN);
for (var i = -2; i > -20; i--)
assertEq(Math.log1p(i), NaN);
// If x is -1, the result is -∞.
assertEq(Math.log1p(-1), -Infinity);
// If x is +0, the result is +0.
assertEq(Math.log1p(+0), +0);
// If x is −0, the result is −0.
assertEq(Math.log1p(-0), -0);
// If x is +∞, the result is +∞.
assertEq(Math.log1p(Infinity), Infinity);
reportCompare(0, 0, "ok");
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