/*
 * Copyright (c) 2021, 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 CONST_CANONICAL_TYPE(FutureOr<T>) = FutureOr<S>* where S is
 * CONST_CANONICAL_TYPE(T)
 *
 * @description Checks that CONST_CANONICAL_TYPE(FutureOr<Null>) = FutureOr<Null>
 *
 * @author iarkh@unipro.ru
 */
// Requirements=nnbd-strong

import"dart:async";
import "../../Utils/expect.dart";
import "const_evaluation_lib.dart";

dynamic d = null;
Never n = throw "Should not reach here";

const c1 = C<FutureOr<Null>>(null);

void test1() => c1.test(1);
void test2() => c1.test(null);
void test3() => c1.test(d);
void test4() => c1.test(n);

main() {
  Expect.throws(() => test1());
  test2();
  test3();
  Expect.throws(() => test4());
}