LanguageFeatures/Subtyping/dynamic/generated/left_FutureOr_fail_return_value_fail_A01_t01.dart

/*
 * 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 Future<S0> is a
 * subtype of T1 but S0 is not a subtype of a type T1, then a type T0 is not a
 * subtype of a type T1.
 * @author ngl@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 file, 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";

class S0 {}

FutureOr<S0> t0Instance = new S0();
Future<S0> t1Instance = new Future<S0>.value(new S0()); // S0 is not a subtype of T1 (T1 is Future<S0>)




Future<S0> returnValueFunc() => forgetType(t0Instance);

class ReturnValueTest {
  static Future<S0> staticTestMethod() => forgetType(t0Instance);

  Future<S0> testMethod() => forgetType(t0Instance);

  Future<S0> get testGetter => forgetType(t0Instance);
}

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

main() {
  Future<S0> 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<Future<S0>>().testMethod();}, (e) => e is TypeError);
  Expect.throws(() {new ReturnValueGen<Future<S0>>().testGetter;}, (e) => e is TypeError);
  //# -->
}