ue);

    let specifiedValue = map.get(name);
    assert_true(specifiedValue instanceof CSSUnparsedValue);
    assert_equals(specifiedValue.toString(), value);

    let allSpecifiedValues = map.getAll(name);
    assert_equals(allSpecifiedValues.length, 1);
    assert_true(allSpecifiedValues[0] instanceof CSSUnparsedValue);
    assert_equals(allSpecifiedValues[0].toString(), value);
}

// Verifies that the specified value is accepted by set().
function verify_map_set(map, name, value) {
    map.set(name, val