<!doctype html>
<meta charset="utf-8">
<title>Details activation with space bar</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1726454">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<style>
:root {
  scroll-behavior: instant;
}
.spacer {
  height: 200vh;
}
</style>
<details>
  <summary>Activate me with the <kbd>Space</kbd> key</summary>
  <p>Summary</p>
</details>
<div class="spacer"></div>
<script>
function tick() {
  return new Promise(resolve => requestAnimationFrame(() => requestAnimationFrame(resolve)));
}

promise_test(async t => {
  const details = document.querySelector("details");
  const summary = details.querySelector("summary");

  summary.focus();
  assert_equals(document.activeElement, summary, "Summary should be focusable");
  assert_false(details.open, "Details should be closed");

  const oldScrollY = window.scrollY;
  assert_equals(oldScrollY, 0, "Should be at top");

  window.addEventListener("scroll", t.unreached_func("Unexpected scroll event"));

  await test_driver.send_keys(summary, " ");

  assert_true(details.open, "Space bar on summary should open details");
  assert_equals(window.scrollY, oldScrollY, "Scroll position shouldn't change");

  await tick();

  assert_equals(window.scrollY, oldScrollY, "Scroll position shouldn't change");
});
</script>
