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chromium/third_party/blink/web_tests/external/wpt/css/css-values/minmax-angle-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/#angles">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#calc-serialize">
<link rel="author" title="Xiaocheng Hu" href="mailto:[email protected]">
<link rel="author" title="Tab Atkins-Bittner" href="https://xanthir.com/contact">
<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,u, {prop="transform"}={}) {
	t = `rotate(${t})`;
    test_specified_serialization(prop, t, `rotate(${s})`);
    test_computed_serialization(prop, t, c);
    if(u) test_used_serialization(prop, t, u);
}

// Browsers aren't perfectly interoperable about how a 90deg rotation is serialized,
// but that's not the focus of this test,
// so just capture *whatever* the browser does and expect that.
const rotateMatrix = (()=>{
    const el = document.querySelector("#target");
    el.style.transform = "rotate(90deg)";
    const ret = getComputedStyle(el).transform;
    el.removeAttribute('style');
    return ret;
})();

test_serialization(
    'min(90deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'min(.25turn)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'min(100grad)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(90deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(.25turn)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(100grad)',
    'calc(90deg)',
    rotateMatrix);
// No way to test 'rad' serialization without depending heavily on numeric serialization
// and the precision used for radians...

test_serialization(
    'min(90deg, 92deg, 93deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'min(93deg, 92deg, 90deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'min(90deg, 1.58rad, 0.25turn)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'min(0.25turn, 1.58rad, 90deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(81deg, 82deg, 90deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(83deg, 82deg, 90deg)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(90deg, 1.57rad, 0.25turn)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'max(0.25turn, 1.57rad, 90deg)',
    'calc(90deg)',
    rotateMatrix);

test_serialization(
    'calc(min(30deg) + max(60deg))',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'calc(50grad + min(45deg))',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'calc(min(45deg) + 50grad)',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'calc(50grad + max(45deg))',
    'calc(90deg)',
    rotateMatrix);
test_serialization(
    'calc(max(45deg) + 50grad)',
    'calc(90deg)',
    rotateMatrix);

</script>