erify_computed_type(generate_property('<length>#'), '10px, 20px', CSSUnitValue);
}, 'First computed value correctly reified in comma-separated list');

// StylePropertyMapReadOnly.getAll

test(function(){
    let name = generate_property({syntax: '<length>+', initialValue: '10px 20px'});
    assert_equals(target.computedStyleMap().getAll(name).length, 2);
    assert_true(target.computedStyleMap().getAll(name).every(x => x instanceof CSSUnitValue));

    target.style = `${name}: 10px 20px 30px`;
    assert_e