<!doctype html>
<meta charset="utf-8">
<title>CSS Pseudo-Elements Test: highlight cascade: inheritance with both universal and non-universal rules</title>
<link rel="author" title="Delan Azabani" href="mailto:dazabani@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#highlight-cascade">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7591">
<meta name="assert" content="This test verifies that non-applicable property declarations are ignored in highlight pseudos, that the computed values of ‘font-size’ and ‘line-height’ in highlight pseudos are taken from the originating element, and that ‘text-shadow’ in highlight pseudos respects these values when given ‘em’ and ‘lh’ units.">
<script src="support/selections.js"></script>
<link rel="stylesheet" href="support/highlights.css">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
    main {
        font-size: 12px;
        line-height: 13px;
    }
    main span {
        font-size: 18px;
        line-height: 19px;
    }
    /* * (universal) */::selection {
        font-size: 42px;
        line-height: 43px;
    }
    main .M::selection {
        text-shadow: green 1em 0;
    }
    main .W::selection {
        text-shadow: green 0 1lh;
    }
    /* * (universal) */::selection {
        text-decoration-thickness: 1em;
    }
</style>
<main>
    <div class="M"><div><span>M</span></div></div>
    <div class="W"><div><span>W</span></div></div>
    <div class="U"><div><span>U</span></div></div>
</main>
<script>
    selectNodeContents(document.querySelector("main"));

    const m = getComputedStyle(document.querySelector("main .M"), "::selection");
    const mSpan = getComputedStyle(document.querySelector("main .M span"), "::selection");
    test(() => void assert_equals(m.fontSize, "12px"),
        "M::selection’s font-size is the same as in M");
    test(() => void assert_equals(mSpan.fontSize, "18px"),
        "M span::selection’s font-size is the same as in M span");
    test(() => void assert_equals(m.textShadow, "rgb(0, 128, 0) 12px 0px 0px"),
        "M::selection’s own text-shadow respects M’s font-size");
    test(() => void assert_equals(mSpan.textShadow, "rgb(0, 128, 0) 12px 0px 0px"),
        "M span::selection’s inherited text-shadow respects M’s font-size");

    const w = getComputedStyle(document.querySelector("main .W"), "::selection");
    const wSpan = getComputedStyle(document.querySelector("main .W span"), "::selection");
    test(() => void assert_equals(w.lineHeight, "13px"),
        "W::selection’s line-height is the same as in W");
    test(() => void assert_equals(wSpan.lineHeight, "19px"),
        "W span::selection’s line-height is the same as in W span");
    test(() => void assert_equals(w.textShadow, "rgb(0, 128, 0) 0px 13px 0px"),
        "W::selection’s own text-shadow respects W’s line-height");
    test(() => void assert_equals(wSpan.textShadow, "rgb(0, 128, 0) 0px 13px 0px"),
        "W span::selection’s inherited text-shadow respects W’s line-height");

    const u = getComputedStyle(document.querySelector("main .U"), "::selection");
    const uSpan = getComputedStyle(document.querySelector("main .U span"), "::selection");
    test(() => void assert_equals(u.fontSize, "12px"),
        "U::selection’s font-size is the same as in U");
    test(() => void assert_equals(uSpan.fontSize, "18px"),
        "U span::selection’s font-size is the same as in U span");
    test(() => void assert_equals(u.textDecorationThickness, "12px"),
        "U::selection’s own text-decoration-thickness respects U’s font-size");
    test(() => void assert_equals(uSpan.textDecorationThickness, "18px"),
        "U span::selection’s own text-decoration-thickness respects U span’s font-size");
</script>
