LibTest/async/Zone/inSameErrorZone_A01_t03.dart

/*
 * Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion abstract bool inSameErrorZone(Zone otherZone)
 * Returns true if this and otherZone are in the same error zone.
 * Two zones are in the same error zone if they share the same
 * handleUncaughtError callback.
 * @description Checks that errors are handled by the error zone callbacks.
 * @author ilya
 */
import "dart:async";
import "../../../Utils/expect.dart";

same() {
  Zone? z = Zone.current.parent;
  if (z != null) {
    Expect.isTrue(Zone.current.inSameErrorZone(z));
  return;
  }
  Expect.fail("Zone.current.parent is null");
}

diff() {
  Zone? z = Zone.current.parent;
  if (z != null) {
    Expect.isFalse(Zone.current.inSameErrorZone(z));
  return;
  }
}

main() {
  runZoned(() {
    asyncStart();
    // new error zone
    diff();
    // error is caught by catchError
    new Future.error(1).catchError((_) {
      diff();
      asyncEnd();
    });

    runZoned(() {
      // not error zone, shares callback with the parent
      same();
      asyncStart();
      // catchError is registered in same error zone
      // error is caught by catchError
      new Future.error(2).catchError((_) {
        asyncEnd();
      });
    });
  }, onError: (e) {
    Expect.fail('should not happen');
  });
}