0));
}, 'Appending a CSSUnitValue to <length>+ is not allowed');

test_specified_maps(function(map) {
    verify_map_no_append(map, generate_property('<number>+'), CSS.number(10));
}, 'Appending a CSSUnitValue to <number>+ is not allowed');

test_specified_maps(function(map) {
    verify_map_no_append(map, generate_property('<percentage>+'), CSS.percent(10));
}, 'Appending a CSSUnitValue to <percentage>+ is not allowed');

test_specified_maps(function(map) {
    verify_map_no_append(map, generate_property('