michael@0: 
michael@0: var C1 = 1;
michael@0: 
michael@0: function f(x) {
michael@0:     var s = "";
michael@0: 
michael@0:     switch(x) {
michael@0:     case 0:
michael@0:         s += "0";
michael@0:     case C1:
michael@0:         s += "1";
michael@0:     }
michael@0:     return s;
michael@0: }
michael@0: 
michael@0: assertEq(f(0), "01");
michael@0: assertEq(f(1), "1");
michael@0: assertEq(f(2), "");
michael@0: 
michael@0: assertEq(f(true), "");
michael@0: assertEq(f(Math), "");
michael@0: