michael@0: // Array.of passes the number of arguments to the constructor it calls.
michael@0: 
michael@0: var hits = 0;
michael@0: function Herd(n) {
michael@0:     assertEq(arguments.length, 1);
michael@0:     assertEq(n, 5);
michael@0:     hits++;
michael@0: }
michael@0: Herd.of = Array.of;
michael@0: Herd.of("sheep", "cattle", "elephants", "whales", "seals");
michael@0: assertEq(hits, 1);