css/css-variables/variable-substitution-shadow-properties.html

<!DOCTYPE html>
<html>
<head>
    <title>test shadow property variable substitution</title>

    <meta rel="author" title="Kevin Babbitt">
    <meta rel="author" title="Greg Whitworth">
    <link rel="author" title="Microsoft Corporation" href="http://microsoft.com" />
    <link rel="help" href="http://www.w3.org/TR/css-variables-1/#defining-variables">

    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <style>
        .testArea {
            width: 100px;
            height: 100px;
            display: inline-block;
        }
    </style>
</head>
<body>
    <div id="log"></div>
    <div class="testArea" id="box-shadow" style="--foo: rgb(0, 128, 0); box-shadow: 1px 1px 1px 1px var(--foo);">box-shadow</div>
    <div class="testArea" id="box-shadow-with-comment" style="--foo: 1px /* hello */ rgb(0, 128, 0); box-shadow: 1px 1px 1px var(--foo);">box-shadow</div>
    <div class="testArea" id="text-shadow" style="--foo: rgb(0, 128, 0); text-shadow: 1px 1px 1px var(--foo);">text-shadow</div>
    <script type="text/javascript">
        "use strict";

        let templates = [
            {
                testName:"box-shadow",
                property:"box-shadow",
                expectedValue:"rgb(0, 128, 0) 1px 1px 1px 1px",
            },
            {
                testName:"box-shadow-with-comment",
                property:"box-shadow",
                expectedValue:"rgb(0, 128, 0) 1px 1px 1px 1px",
            },
            {
                testName:"text-shadow",
                property:"text-shadow",
                expectedValue:"rgb(0, 128, 0) 1px 1px 1px",
            },
        ];

        templates.forEach(function (template) {
            test( function () {
                let target = document.getElementById(template.testName);
                let computedStyle = window.getComputedStyle(target);
                let value = computedStyle.getPropertyValue(template.property);
                assert_equals(value, template.expectedValue, "Expected Value should match actual value");
            }, template.testName);
        });
    </script>
</body>
</html>