close-watcher/abortsignal.html

<!doctype html>
<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>
<script src="/resources/testdriver-actions.js"></script>

<div id='d' style='height: 100px; width: 100px'></div>
<script>
// *not* \uu001B; see https://w3c.github.io/webdriver/#keyboard-actions
const ESC = '\uE00C';

test(() => {
  let watcher = new CloseWatcher({ signal: AbortSignal.abort() });
  let oncancel_called = false;
  let onclose_called = false;
  watcher.oncancel = () => oncancel_called = true;
  watcher.onclose = () => onclose_called = true;

  watcher.close();

  assert_false(oncancel_called);
  assert_false(onclose_called);
}, "already-aborted AbortSignal then close() fires no events");

test(() => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  let oncancel_called = false;
  let onclose_called = false;
  watcher.oncancel = () => oncancel_called = true;
  watcher.onclose = () => onclose_called = true;

  controller.abort();
  watcher.close();

  assert_false(oncancel_called);
  assert_false(onclose_called);
}, "abortController.abort() then close() fires no events");

test(() => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  let oncancel_call_count_ = 0;
  let onclose_call_count_ = 0;
  watcher.oncancel = () => oncancel_call_count_++;
  watcher.onclose = () => onclose_call_count_++;

  watcher.close();
  controller.abort();

  assert_equals(oncancel_call_count_, 0);
  assert_equals(onclose_call_count_, 1);
}, "close() then abortController.abort() fires only one close event");

promise_test(async () => {
  let watcher = new CloseWatcher({ signal: AbortSignal.abort() });
  let oncancel_called = false;
  let onclose_called = false;
  watcher.oncancel = () => oncancel_called = true;
  watcher.onclose = () => onclose_called = true;

  await test_driver.send_keys(document.getElementById('d'), ESC);

  assert_false(oncancel_called);
  assert_false(onclose_called);
}, "already-aborted AbortSignal then Esc key fires no events");

promise_test(async t => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  let oncancel_called = false;
  let onclose_called = false;
  watcher.oncancel = () => oncancel_called = true;
  watcher.onclose = () => onclose_called = true;

  controller.abort();
  await test_driver.send_keys(document.getElementById('d'), ESC);

  assert_false(oncancel_called);
  assert_false(onclose_called);
}, "abortController.abort() then close via Esc key fires no events");

promise_test(async t => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  let oncancel_call_count_ = 0;
  let onclose_call_count_ = 0;
  watcher.oncancel = () => oncancel_call_count_++;
  watcher.onclose = () => onclose_call_count_++;

  await test_driver.send_keys(document.getElementById('d'), ESC);
  controller.abort();

  assert_equals(oncancel_call_count_, 0);
  assert_equals(onclose_call_count_, 1);
}, "Esc key then abortController.abort() fires only one close event");

test(t => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  controller.abort();
  let watcher2 = new CloseWatcher();
  t.add_cleanup(() => watcher2.destroy());
}, "abortController.abort()ing a free CloseWatcher allows a new one to be created without a user activation");

promise_test(async t => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  watcher.oncancel = () => { controller.abort(); }
  watcher.onclose = t.unreached_func("onclose");
  await test_driver.bless("give user activation so that cancel will fire", () => {
    watcher.close();
  });
}, "abortController.abort() inside oncancel");

test(t => {
  let controller = new AbortController();
  let watcher = new CloseWatcher({ signal: controller.signal });
  watcher.onclose = () => { controller.abort(); }
  watcher.close();
}, "abortController.abort() inside onclose is benign");
</script>