IndexedDB/event-dispatch-active-flag.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>Transaction active flag is set during event dispatch</title>
<link rel="help" href="https://w3c.github.io/IndexedDB/#fire-success-event">
<link rel="help" href="https://w3c.github.io/IndexedDB/#fire-error-event">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=support.js></script>
<script>

indexeddb_test(
  (t, db, tx) => {
    db.createObjectStore('store');
  },
  (t, db) => {
    const tx = db.transaction('store');
    const release_tx = keep_alive(tx, 'store');

    assert_true(is_transaction_active(tx, 'store'),
                'Transaction should be active after creation');

    const request = tx.objectStore('store').get(0);
    request.onerror = t.unreached_func('request should succeed');
    request.onsuccess = () => {
      assert_true(is_transaction_active(tx, 'store'),
                  'Transaction should be active during success handler');

      let saw_handler_promise = false;
      Promise.resolve().then(t.step_func(() => {
        saw_handler_promise = true;
        assert_true(is_transaction_active(tx, 'store'),
                    'Transaction should be active in handler\'s microtasks');
      }));

      setTimeout(t.step_func(() => {
        assert_true(saw_handler_promise);
        assert_false(is_transaction_active(tx, 'store'),
                     'Transaction should be inactive in next task');
        release_tx();
        t.done();
      }), 0);
    };
  },
  'Transactions are active during success handlers');

indexeddb_test(
  (t, db, tx) => {
    db.createObjectStore('store');
  },
  (t, db) => {
    const tx = db.transaction('store');
    const release_tx = keep_alive(tx, 'store');
    assert_true(is_transaction_active(tx, 'store'),
                'Transaction should be active after creation');

    const request = tx.objectStore('store').get(0);
    request.onerror = t.unreached_func('request should succeed');
    request.addEventListener('success', () => {
      assert_true(is_transaction_active(tx, 'store'),
                  'Transaction should be active during success listener');

      let saw_listener_promise = false;
      Promise.resolve().then(t.step_func(() => {
        saw_listener_promise = true;
        assert_true(is_transaction_active(tx, 'store'),
                    'Transaction should be active in listener\'s microtasks');
      }));

      setTimeout(t.step_func(() => {
        assert_true(saw_listener_promise);
        assert_false(is_transaction_active(tx, 'store'),
                     'Transaction should be inactive in next task');
        release_tx();
        t.done();
      }), 0);
    });
  },
  'Transactions are active during success listeners');

indexeddb_test(
  (t, db, tx) => {
    db.createObjectStore('store');
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const release_tx = keep_alive(tx, 'store');
    assert_true(is_transaction_active(tx, 'store'),
                'Transaction should be active after creation');

    tx.objectStore('store').put(0, 0);
    const request = tx.objectStore('store').add(0, 0);
    request.onsuccess = t.unreached_func('request should fail');
    request.onerror = e => {
      e.preventDefault();

      assert_true(is_transaction_active(tx, 'store'),
                  'Transaction should be active during error handler');

      let saw_handler_promise = false;
      Promise.resolve().then(t.step_func(() => {
        saw_handler_promise = true;
        assert_true(is_transaction_active(tx, 'store'),
                    'Transaction should be active in handler\'s microtasks');
      }));

      setTimeout(t.step_func(() => {
        assert_true(saw_handler_promise);
        assert_false(is_transaction_active(tx, 'store'),
                     'Transaction should be inactive in next task');
        release_tx();
        t.done();
      }), 0);
    };
  },
  'Transactions are active during error handlers');

indexeddb_test(
  (t, db, tx) => {
    db.createObjectStore('store');
  },
  (t, db) => {
    const tx = db.transaction('store', 'readwrite');
    const release_tx = keep_alive(tx, 'store');
    assert_true(is_transaction_active(tx, 'store'),
                'Transaction should be active after creation');

    tx.objectStore('store').put(0, 0);
    const request = tx.objectStore('store').add(0, 0);
    request.onsuccess = t.unreached_func('request should fail');
    request.addEventListener('error', e => {
      e.preventDefault();

      assert_true(is_transaction_active(tx, 'store'),
                  'Transaction should be active during error listener');

      let saw_listener_promise = false;
      Promise.resolve().then(t.step_func(() => {
        saw_listener_promise = true;
        assert_true(is_transaction_active(tx, 'store'),
                    'Transaction should be active in listener\'s microtasks');
      }));

      setTimeout(t.step_func(() => {
        assert_true(saw_listener_promise);
        assert_false(is_transaction_active(tx, 'store'),
                     'Transaction should be inactive in next task');
        release_tx();
        t.done();
      }), 0);
    });
  },
  'Transactions are active during error listeners');

</script>