michael@0: var samples = [
michael@0:     "[...a]",
michael@0:     "[...[1]]",
michael@0:     "[1, ...a, 2]",
michael@0:     "[1, ...[2, 3], 4]",
michael@0:     "[...[1], , ]",
michael@0:     "[1, , ...[2]]",
michael@0:     "[, 1, ...[2], ...[3], , 4, 5, , ]"
michael@0: ];
michael@0: for (var sample of samples) {
michael@0:     var source = "function f() {\n    return " + sample + ";\n}";
michael@0:     eval(source);
michael@0:     assertEq(f.toString(), source);
michael@0: }