--- /dev/null
+'use strict';
+
+module.exports = function (t, a) {
+ var x;
+ a(t.call([]), null, "Empty");
+ a(t.call([null]), 0, "One value");
+ a(t.call([1, 2, 3]), 0, "Many values");
+ a(t.call(new Array(1000)), null, "Sparse empty");
+ x = [];
+ x[883] = undefined;
+ x[890] = null;
+ a(t.call(x), 883, "Manual sparse, distant value");
+ x = new Array(1000);
+ x[657] = undefined;
+ x[700] = null;
+ a(t.call(x), 657, "Sparse, distant value");
+};