<!DOCTYPE html>
<meta charset="utf-8" />
<title>CSS Selectors Invalidation: :modal 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">
<link rel="help" href="https://drafts.csswg.org/selectors/#modal-state">
<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(#dialog:modal) { color: green; }
  #subject:has(#fullscreenTarget:modal) { color: blue; }
</style>
<div id="subject">
  This is some text.
  <dialog id="dialog">This is a dialog</dialog>
  <div id="fullscreenTarget">This is going to be fullscreened</div>
</div>
<script>
  // Dialog tests
  test(function() {
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since dialog is not modal");
    dialog.show();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since dialog is not modal");
    dialog.close();
  }, ":modal pseudo-class is not active with dialog.show()");
  test(function() {
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black");
    dialog.showModal();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 128, 0)",
                  "ancestor should be green since dialog is shown modally");
    dialog.close();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since dialog is closed");
  }, ":modal pseudo-class invalidation with showModal + close");
  test(function() {
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black");
    dialog.showModal();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 128, 0)",
                  "ancestor should be green since dialog is shown modally");
    dialog.remove();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since dialog is removed");
  }, ":modal pseudo-class invalidation with showModal + remove");

  // Fullscreen tests
  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", () => fullscreenTarget.requestFullscreen());
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 255)",
                  "ancestor should be blue 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");
  }, ":modal 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", () => fullscreenTarget.requestFullscreen());
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 255)",
                  "ancestor should be blue since target is fullscreen");
    fullscreenTarget.remove();
    await waitForFullscreenChange();
    assert_equals(getComputedStyle(subject).color, "rgb(0, 0, 0)",
                  "ancestor should be black since target is removed");
  }, ":modal pseudo-class invalidation with requestFullscreen + remove");
</script>
