css-variable-change-style-002.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-variables/css-variable-change-style-002.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Variables Test: Style changes on properties using variables</title>

<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">

<link rel="help" href="http://www.w3.org/TR/css-variables-1/#using-variables">

<meta name="assert" content="A change in the custom property declaration must be propagated to all the descendants">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<style>

    .test1 > div > div { color: var(--x); }

    .test2 > div > div { background-color: var(--x); }

    .test3 > div > div { white-space: var(--x); }

</style>

<div id="outer">

    <div>

        <div id="inner1"></div>

    </div>

    <div>

        <div id="inner2"></div>

    </div>

    <div>

        <div id="inner3"></div>

    </div>

</div>

<script>

    "use strict";

    let colorValues = [

        { Id: "case1", value: "red",   expected: "rgb(255, 0, 0)" },

        { Id: "case2", value: "green", expected: "rgb(0, 128, 0)" },

];

    let whiteSpaceValues = [

        { Id: "case1", value: "pre-wrap", expected: "pre-wrap" },

        { Id: "case2", value: "nowrap",   expected: "nowrap" },

];

    let testcases = [

        { property: "color",            className: "test1", values: colorValues, },

        { property: "background-color", className: "test2", values: colorValues, },

        { property: "white-space",      className: "test3", values: whiteSpaceValues},

];

    testcases.forEach(function (testcase) {

        test( function () {

            outer.className = testcase.className;

            testcase.values.forEach(function (entry) {

                document.body.style.cssText = "--x: " + entry.value;

                let actualValue = getComputedStyle(inner1).getPropertyValue(testcase.property);

                assert_equals(actualValue, entry.expected, entry.Id + "-1");

                actualValue = getComputedStyle(inner2).getPropertyValue(testcase.property);

                assert_equals(actualValue, entry.expected, entry.Id + "-2");

                actualValue = getComputedStyle(inner3).getPropertyValue(testcase.property);

                assert_equals(actualValue, entry.expected, entry.Id + "-3");

});

        }, "Declaration changes on '" + testcase.property + "' propagate to all variable references");

});

</script>