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calc-serialization-002.html
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calc-serialization-002.html
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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Values and Units: serialization of calc() specified values: 19 arithmetical operations (complex)</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<link rel="help" href="https://www.w3.org/TR/css-values-4/#calc-serialize">
<meta content="" name="flags">
<meta content="This test verifies how 19 arithmetical operations of mixed length units in calc() specified values are serialized. Absolute length units (cm, in, mm, pc, pt, q, px), font-relative length units (ex, em, rem), viewport-percentage length units (vh, vmax, vmin, vw) and percentage units are tested. 12 additions, 6 substractions and 1 division are tested." name="assert">
<!--
Issue 1050968: CSS calc and other math function serialization doesn't follow the spec
https://bugs.chromium.org/p/chromium/issues/detail?id=1050968
-->
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="target"></div>
<script>
function startTesting()
{
var targetElement = document.getElementById("target");
function verifySerialization(specified_value, serialization_expected, description)
{
test(function()
{
targetElement.style.height = specified_value;
assert_equals(targetElement.style.height, serialization_expected);
}, description);
}
/*
"
If nodes contains a number, remove it from nodes and append it to ret.
If nodes contains a percentage, remove it from nodes and append it to ret.
If nodes contains any dimensions, remove them from nodes, sort them by their units, ordered ASCII case-insensitively, and append them to ret.
If nodes still contains any items, append them to ret in the same order.
"
https://www.w3.org/TR/css-values-4/#calc-serialize
*/
/* 12 Additions */
verifySerialization("calc(1vh + 2px + 3%)", "calc(3% + 2px + 1vh)", "testing calc(1vh + 2px + 3%)");
verifySerialization("calc(4px + 1vh)", "calc(4px + 1vh)", "testing calc(4px + 1vh)");
verifySerialization("calc(5px + 6em + 1vh)", "calc(6em + 5px + 1vh)", "testing calc(5px + 6em + 1vh)");
verifySerialization("calc(-8px + 9em + 1vh)", "calc(9em - 8px + 1vh)", "testing calc(-8px + 9em + 1vh)");
verifySerialization("calc(1pc + 1in + 1vh + 10%)", "calc(10% + 112px + 1vh)", "testing calc(1pc + 1in + 1vh + 10%)");
verifySerialization("calc(25.4q + 1vh + 12%)", "calc(12% + 24px + 1vh)", "testing calc(25.4q + 1vh + 12%)");
verifySerialization("calc(1em + 1.27cm + 13% + 3em)", "calc(13% + 4em + 48px)", "testing calc(1em + 1.27cm + 13% + 3em)");
/* verifySerialization(specified_value, serialization_expected, description) */
verifySerialization("calc(15vw + 16vmin - 17vh)", "calc(-17vh + 16vmin + 15vw)", "testing calc(15vw + 16vmin - 17vh)");
verifySerialization("calc(9pt + calc(9rem + 10px))", "calc(22px + 9rem)", "testing calc(9pt + calc(9rem + 10px))");
verifySerialization("calc(5pt + 5em + 4pt + 3em)", "calc(8em + 12px)", "testing calc(5pt + 5em + 4pt + 3em)");
verifySerialization("calc(4vmin + 0pt + 3pc)", "calc(48px + 4vmin)", "testing calc(4vmin + 0pt + 3pc)");
verifySerialization("calc(4vmin + 0pt)", "calc(0px + 4vmin)", "testing calc(4vmin + 0pt)");
/*
More info on the calc(4vmin + 0pt) sub-test:
https://github.com/web-platform-tests/wpt/pull/38245#issuecomment-1464215777
Date: March 10th 2023
*/
/* 6 Substractions */
verifySerialization("calc(100% - 100% + 1em)", "calc(0% + 1em)", "testing calc(100% - 100% + 1em)");
verifySerialization("calc(100% + 1em - 100%)", "calc(0% + 1em)", "testing calc(100% + 1em - 100%)");
verifySerialization("calc(1vh - 7px)", "calc(-7px + 1vh)", "testing calc(1vh - 7px)");
verifySerialization("calc(5ex - 9ex)", "calc(-4ex)", "testing calc(5ex - 9ex)");
/*
An out-of-range value inside calc() is not syntactically invalid.
Inside a calc() function, the resulting summation value can be
out of range and can be serialized.
*/
verifySerialization("calc(-80px + 25.4mm)", "calc(16px)", "testing calc(-80px + 25.4mm)");
/* verifySerialization(specified_value, serialization_expected, description) */
/*
Check distributing multiplication over sums and subs simplification.
NOTE: If root contains only two children, one of which is a number
(not a percentage or dimension) and the other of which is a Sum
whose children are all numeric values, multiply all of the Sum’s
children by the number, then return the Sum. So, num * (fn + fn)
should not be simplified.
*/
verifySerialization("calc(2 * (10px + 1rem))", "calc(20px + 2rem)", "testing calc(2 * (10px + 1rem))");
verifySerialization("calc(2 * (10px - 1rem))", "calc(20px - 2rem)", "testing calc(2 * (10px - 1rem))");
verifySerialization("calc((10px + 1rem) / 2)", "calc(5px + 0.5rem)", "testing calc((10px + 1rem) / 2)");
verifySerialization(
"calc(2 * (min(10px, 20%) + max(1rem, 2%)))",
"calc(2 * (min(10px, 20%) + max(1rem, 2%)))",
"testing calc(2 * (min(10px, 20%) + max(1rem, 2%)))"
);
verifySerialization(
"calc((min(10px, 20%) + max(1rem, 2%)) * 2)",
"calc((min(10px, 20%) + max(1rem, 2%)) * 2)",
"testing calc((min(10px, 20%) + max(1rem, 2%)) * 2)"
);
verifySerialization("calc(1vmin - 14%)", "calc(-14% + 1vmin)", "testing calc(1vmin - 14%)");
/* 1 Multiplication and division */
verifySerialization("calc(4 * 3px + 4pc / 8)", "calc(20px)", "testing calc(4 * 3px + 4pc / 8)");
/*
This calc(4 * 3px + 4pc / 8) test is on purpose last. We want the
div#target to occupy 20px and to not cause document box height
to be unneedlessly tall.
*/
}
startTesting();
</script>