/*
 * 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 We say that a type T0 is a subtype of a type T1 (written T0 <: T1)
 * when:
 * Right Object: if T1 is Object then:
 *  - if T0 is an unpromoted type variable with bound B then T0 <: T1 iff
 *      B <: Object
 *  - if T0 is a promoted type variable X & S then T0 <: T1 iff S <: Object
 *  - if T0 is FutureOr<S> for some S, then T0 <: T1 iff S <: Object.
 *  - if T0 is S* for any S, then T0 <: T1 iff S <: T1
 *  - if T0 is Null, dynamic, void, or S? for any S, then the subtyping does not
 *      hold (per above, the result of the subtyping query is false).
 *  - Otherwise T0 <: T1 is true.
 * @description Check that if T0 is FutureOr<S> for some S but S is not subtype
 * of Object 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 be used as a return value of type T1
 * @author sgrekhov@unipro.ru
 */
/*
 * This test is generated from right_object_fail_A04.dart and 
 * return_value_fail_x01.dart.
 * Don't modify it. If you want to change this file, change one of the files 
 * above and then run generator.dart to regenerate the tests.
 */


import '../../utils/common.dart';
import '../../../../Utils/expect.dart';
// SharedOptions=--enable-experiment=non-nullable
import "dart:async";

class S {}

FutureOr<S?> t0Instance = new S();
Object t1Instance = new Object();


Object returnValueFunc() => forgetType(t0Instance);

class ReturnValueTest {
  static Object staticTestMethod() => forgetType(t0Instance);

  Object testMethod() => forgetType(t0Instance);

  Object get testGetter => forgetType(t0Instance);
}

class ReturnValueGen<X> {
  X testMethod() => forgetType(t0Instance);
  X get testGetter => forgetType(t0Instance);
}

main() {
  Object returnValueLocalFunc() => forgetType(t0Instance);

  Expect.throws(() {returnValueFunc();}, (e) => e is TypeError);
  Expect.throws(() {returnValueLocalFunc();}, (e) => e is TypeError);
  Expect.throws(() {ReturnValueTest.staticTestMethod();}, (e) => e is TypeError);

  Expect.throws(() {new ReturnValueTest().testMethod();}, (e) => e is TypeError);
  Expect.throws(() {new ReturnValueTest().testGetter;}, (e) => e is TypeError);

  // Test type parameters

  //# <-- NotGenericFunctionType
  Expect.throws(() {new ReturnValueGen<Object>().testMethod();}, (e) => e is TypeError);
  Expect.throws(() {new ReturnValueGen<Object>().testGetter;}, (e) => e is TypeError);
  //# -->
}