css/css-values/sin-cos-tan-serialize.html

<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-values-4/#comp-func">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#numbers">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#calc-serialize">
<link rel="author" title="Apple Inc">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../support/serialize-testcommon.js"></script>
<div id=target></div>
<script>
function test_serialization(t,s,c) {
    test_specified_serialization('opacity', t, s);
    test_specified_serialization('transform', `scale(${t})`, `scale(calc(${c}))`);
    test_computed_serialization('opacity', t, c);
    test_computed_serialization('transform', `scale(${t})`, `matrix(${c}, 0, 0, ${c}, 0, 0)`);
}

test_serialization(
    'cos(0)',
    'calc(1)',
    '1');
test_serialization(
    'sin(0)',
    'calc(0)',
    '0');
test_serialization(
    'tan(0)',
    'calc(0)',
    '0');

test_serialization(
    'calc(sin(0) + cos(0) + tan(0))',
    'calc(1)',
    '1');

test_serialization(
    'calc(sin(0) + 0.5)',
    'calc(0.5)',
    '0.5');
test_serialization(
    'calc(cos(0) + 0.5)',
    'calc(1.5)',
    '1.5');
test_serialization(
    'calc(tan(0) + 0.5)',
    'calc(0.5)',
    '0.5');

test_serialization(
    'calc(sin(infinity))',
    'calc(NaN)',
    'NaN');
test_serialization(
    'calc(cos(infinity))',
    'calc(NaN)',
    'NaN');
test_serialization(
    'calc(tan(infinity))',
    'calc(NaN)',
    'NaN');
</script>