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-rw-r--r--js/src/tests/ecma_6/Math/expm1-exact.js20
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diff --git a/js/src/tests/ecma_6/Math/expm1-exact.js b/js/src/tests/ecma_6/Math/expm1-exact.js
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+++ b/js/src/tests/ecma_6/Math/expm1-exact.js
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+// Properties of Math.expm1 that are guaranteed by the spec.
+
+// If x is NaN, the result is NaN.
+assertEq(Math.expm1(NaN), NaN);
+
+// If x is +0, the result is +0.
+assertEq(Math.expm1(+0), +0);
+
+// If x is −0, the result is −0.
+assertEq(Math.expm1(-0), -0);
+
+// If x is +∞, the result is +∞.
+assertEq(Math.expm1(Infinity), Infinity);
+
+// If x is −∞, the result is -1.
+assertEq(Math.expm1(-Infinity), -1);
+
+
+reportCompare(0, 0, "ok");
+