michael@0: "abcdefg".match(/(x)y(z)/g);
michael@0: assertEq(RegExp.$1, "");
michael@0: 
michael@0: assertEq("abcdef".match(/a(b)cd/g)[0], "abcd");
michael@0: assertEq(RegExp.$1, "b");
michael@0: assertEq(RegExp.$2, "");
michael@0: 
michael@0: "abcdef".match(/(a)b(c)/g);
michael@0: assertEq(RegExp.$1, "a");
michael@0: assertEq(RegExp.$2, "c");
michael@0: assertEq(RegExp.$3, "");
michael@0: 
michael@0: "abcabdabe".match(/(a)b(.)/g);
michael@0: assertEq(RegExp.$1, "a");
michael@0: assertEq(RegExp.$2, "e");
michael@0: 
michael@0: "abcdefg".match(/(x)y(z)/g);
michael@0: assertEq(RegExp.$1, "a");    //If there's no match, we don't update the statics.
michael@0: 
michael@0: "abcdefg".match(/(g)/g);
michael@0: assertEq(RegExp.$1, "g");