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Added 1 test about z-index and fractional values #15401

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Feb 18, 2019
Merged

Added 1 test about z-index and fractional values #15401

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Added 1 test about z-index and fractional values
TalbotG Feb 14, 2019
785485c
useless change to trigger a rebuild
frivoal Feb 15, 2019
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59 changes: 59 additions & 0 deletions css/css-values/calc-z-index-fractions-001.html
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<!DOCTYPE html>

<meta charset="UTF-8">

<title>CSS Values and Units Test: computed value of 'z-index' when specified with calc() function and fractional values</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-range">

<meta name="flags" content="">
<meta content="This test verifies how 2 calc() functions are computed for 'z-index' when involved expressions end up being numbers halfway between adjacent integers." name="assert">

<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 verifyComputedStyle(property_name, initial_value, specified_value, expected_value, description)
{

test(function()
{

targetElement.style.setProperty(property_name, initial_value);

/*
The purpose of the initial_value is to act as a fallback
value in case the calc() function in the specified value
fails or in case it generates an invalid value. Since we
are running 2 consecutive tests on the same element,
then it is necessary to reset its property to an initial
value.
*/

targetElement.style.setProperty(property_name, specified_value);

assert_equals(getComputedStyle(targetElement)[property_name], expected_value);

}, description);
}

/* verifyComputedStyle(property_name, initial_value, specified_value, expected_value, description) */

verifyComputedStyle("z-index", "auto", "calc(3 / 2)", "2", "testing z-index: calc(3 / 2)");

verifyComputedStyle("z-index", "auto", "calc(-3 / 2)", "-1", "testing z-index: calc(-3 / 2)");

}

startTesting();

</script>