| // Copyright (c) 2019, 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 The upwards inference element type of an if-else list element is |
| /// the least upper bound of the types of the "then" and "else" elements. |
| /// |
| /// @description Checks that the upwards inference element type of an if-else |
| /// list element is the least upper bound of the types of the "then" and "else" |
| /// elements. |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| main() { |
| var i = 1; |
| var list1 = [ |
| new C(), |
| if (i > 0) new B() else new A() |
| ]; |
| Expect.isTrue(list1 is List<A>); |
| Expect.runtimeIsType<List<A>>(list1); |
| |
| var list2 = [ |
| "", |
| if (i < 0) "" else 1, |
| ]; |
| Expect.isTrue(list2 is List<Object>); |
| Expect.runtimeIsType<List<Object>>(list2); |
| |
| var list3 = [ |
| 1, |
| if (i > 0) 3 else 3.14, |
| if (i < 0) 2 |
| ]; |
| Expect.isTrue(list3 is List<num>); |
| Expect.runtimeIsType<List<num>>(list3); |
| } |