| // Copyright (c) 2018, 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 We say that a type T0 is a subtype of a type T1 (written T0 <: T1) |
| /// when: |
| /// Left FutureOr: T0 is FutureOr<S0> |
| /// and Future<S0> <: T1 |
| /// and S0 <: T1 |
| /// @description Check that if a type T0 is FutureOr<S0> and S0 is a subtype of |
| /// T1 but Future<S0> is not a subtype of T1 , then a type T0 is not a subtype of |
| /// a type T1. |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// @description Check that if type T0 not a subtype of a type T1, then instance |
| /// of T0 cannot be be used as a return value of type T1 |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// This test is generated from left_FutureOr_fail_A01.dart and |
| /// return_value_fail_x01.dart. |
| /// Don't modify it. If you want to change this test, change one of the files |
| /// above and then run generator.dart to regenerate the tests. |
| |
| |
| import '../../utils/common.dart'; |
| import '../../../../Utils/expect.dart'; |
| |
| import "dart:async"; |
| |
| FutureOr t0Instance = 42; |
| Future t1Instance = Future.value(42); |
| |
| const t1Default = null; |
| |
| |
| |
| |
| Future? returnValueFunc() => forgetType(t0Instance); |
| |
| class ReturnValueTest { |
| static Future? staticTestMethod() => forgetType(t0Instance); |
| |
| Future? testMethod() => forgetType(t0Instance); |
| |
| Future? get testGetter => forgetType(t0Instance); |
| } |
| |
| class ReturnValueGen<X> { |
| X testMethod() => forgetType(t0Instance); |
| X get testGetter => forgetType(t0Instance); |
| } |
| |
| main() { |
| Future? returnValueLocalFunc() => forgetType(t0Instance); |
| |
| Expect.throws(() { |
| returnValueFunc(); |
| }, (e) => e is TypeError || e is CastError); |
| Expect.throws(() { |
| returnValueLocalFunc(); |
| }, (e) => e is TypeError || e is CastError); |
| Expect.throws(() { |
| ReturnValueTest.staticTestMethod(); |
| }, (e) => e is TypeError || e is CastError); |
| |
| Expect.throws(() { |
| new ReturnValueTest().testMethod(); |
| }, (e) => e is TypeError || e is CastError); |
| Expect.throws(() { |
| new ReturnValueTest().testGetter; |
| }, (e) => e is TypeError || e is CastError); |
| |
| // Test type parameters |
| |
| //# <-- NotGenericFunctionType |
| Expect.throws(() { |
| new ReturnValueGen<Future?>().testMethod(); |
| }, (e) => e is TypeError || e is CastError); |
| Expect.throws(() { |
| new ReturnValueGen<Future?>().testGetter; |
| }, (e) => e is TypeError || e is CastError); |
| //# --> |
| } |