diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/object-is.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/object-is.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var list = [
+    [1, 1, true],
+    [0, 1, false],
+    [3.5, 3.5, true],
+    [0, 0, true],
+    [0, -0, false],
+    [-0, 0, false],
+    [-0, -0, true],
+
+    [true, true, true],
+    [true, false, false],
+    [false, false, true],
+
+    [NaN, NaN, true],
+    [NaN, undefined, false],
+    [Infinity, -Infinity, false],
+    [Infinity, Infinity, true],
+]
+
+for (var test of list) {
+    assertEq(Object.is(test[0], test[1]), test[2])
+}
+
+var obj = {}
+assertEq(Object.is(obj, obj), true);
+assertEq(Object.is(obj, {}), false);
+assertEq(Object.is([], []), false);
+
+assertEq(Object.is(null, null, null), true);
+
+/* Not defined parameters are undefined ... */
+assertEq(Object.is(null), false);
+assertEq(Object.is(undefined), true);
+assertEq(Object.is(), true);
+
+assertEq(Object.is.length, 2);