| // 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 Nullable: if T0 is S0? then: |
| /// - T0 <: T1 iff S0 <: T1 and Null <: T1 |
| /// @description Check that if type T0 is S0? and Null <: T1 but S0 is not |
| /// subtype T1 then T0 is not subtype of T1. |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// @description Check that if type T0 not a subtype of a type T1, then instance |
| /// of T0 cannot be used as a return value of type T1 |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// This test is generated from left_nullable_fail_A02.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'; |
| |
| class T1 { |
| const T1(); |
| } |
| class S0 { |
| const S0(); |
| } |
| |
| S0? t0Instance = new S0(); |
| T1? t1Instance = new T1(); |
| |
| const t1Default = const T1(); |
| |
| |
| |
| |
| T1? returnValueFunc() => forgetType(t0Instance); |
| |
| class ReturnValueTest { |
| static T1? staticTestMethod() => forgetType(t0Instance); |
| |
| T1? testMethod() => forgetType(t0Instance); |
| |
| T1? get testGetter => forgetType(t0Instance); |
| } |
| |
| class ReturnValueGen<X> { |
| X testMethod() => forgetType(t0Instance); |
| X get testGetter => forgetType(t0Instance); |
| } |
| |
| main() { |
| T1? 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<T1?>().testMethod(); |
| }, (e) => e is TypeError || e is CastError); |
| Expect.throws(() { |
| new ReturnValueGen<T1?>().testGetter; |
| }, (e) => e is TypeError || e is CastError); |
| //# --> |
| } |