--- /dev/null
+'use strict';
+
+module.exports = function (t, a) {
+ var x = [], y = {}, z = {};
+ a.deep(t.call(x, y), [], "Empty");
+ a.not(t.call(x), x, "Returns copy");
+ a.deep(t.call([1], y), [1], "One");
+ a.deep(t.call([1, 'raz'], y), [1, y, 'raz'], "One");
+ a.deep(t.call([1, 'raz', x], y), [1, y, 'raz', y, x], "More");
+ x = new Array(1000);
+ x[23] = 2;
+ x[3453] = 'raz';
+ x[500] = z;
+ a.deep(t.call(x, y), [2, y, z, y, 'raz'], "Sparse");
+};