url>');

test_specified_maps(function(map){
    verify_map_set(map, generate_property('<length>+'), 'a b');
}, 'Specified string "a b" accepted by set() for syntax <length>+');

test_specified_maps(function(map){
    verify_map_set(map, generate_property('<length>#'), 'a, b');
}, 'Specified string "a, b" accepted by set() for syntax <length>#');

// CSSUnparsedValue should always be accepted by any custom property,
// regardless of registation status.

const unparsed = CSSStyleValue.parse('--x', 'foo bar th