diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/number-tointeger.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/number-tointeger.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+assertEq(Number.toInteger(4), 4);
+assertEq(Number.toInteger(4.), 4);
+assertEq(Number.toInteger(4.3), 4);
+assertEq(Number.toInteger(-4), -4);
+assertEq(Number.toInteger(-4.), -4);
+assertEq(Number.toInteger(-4.3), -4);
+assertEq(Number.toInteger(0.), 0.);
+assertEq(Number.toInteger(-0.), -0.);
+assertEq(Number.toInteger(Infinity), Infinity);
+assertEq(Number.toInteger(-Infinity), -Infinity);
+assertEq(Number.toInteger(NaN), 0);
+assertEq(Number.toInteger(null), 0);
+assertEq(Number.toInteger(undefined), 0);
+assertEq(Number.toInteger(true), 1);
+assertEq(Number.toInteger(false), 0);
+assertEq(Number.toInteger({valueOf : function () { return 4; }}), 4);
+assertEq(Number.toInteger({valueOf : function () { return 4.3; }}), 4);
+assertEq(Number.toInteger({valueOf : function () { return "4"; }}), 4);
+assertEq(Number.toInteger({valueOf : function () { return {};}}), 0);
+assertEq(Number.toInteger(), 0);