<!DOCTYPE html>
<meta charset="utf-8" />
<title>CSS Selectors Invalidation: :fullscreen pseudo class in :has()</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://drafts.csswg.org/selectors/#relational">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>

<style>
    #subject:has(#target:fullscreen) { color: green; }
</style>

<div id="subject">
    This is some text.
    <div id="target">This is going to be fullscreened</div>
</div>

<script>
let waitForFullscreenChange = () => {
    return new Promise((resolve) => {
      document.addEventListener("fullscreenchange", resolve, { once: true });
    });
};

promise_test(async function() {
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black");
    test_driver.bless("fullscreen", () => target.requestFullscreen());
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 128, 0)",
                  "ancestor should be green since target is fullscreen");
    document.exitFullscreen();
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since target is no longer fullscreen");
}, ":fullscreen pseudo-class invalidation with requestFullscreen + exitFullscreen");

promise_test(async function() {
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black");
    test_driver.bless("fullscreen", () => target.requestFullscreen());
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 128, 0)",
                  "ancestor should be green since target is fullscreen");
    target.remove();
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since target is removed");
}, ":fullscreen pseudo-class invalidation with requestFullscreen + remove");
</script>
