blob: 6ed6215a53154bb9b320c5be89ab17e59c799330 [file] [log] [blame]
* 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. Case when an instance of T0 is an instance of Future<S0> type.
* @author
* @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
* This test is generated from left_FutureOr_fail_A03.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 C1 {
const C1();
class S0 implements Future<C1> {
asStream() => null;
catchError(Function onError, {bool test(Object error)}) => null;
then<S0>(FutureOr<S0> onValue(C1 value), {Function onError}) => null;
timeout(Duration timeLimit, {FutureOr<C1> onTimeout()}) => null;
whenComplete(FutureOr action()) => null;
// Future<S0> is not a subtype of T1 (Future<C1>)
FutureOr<S0> t0Instance = new Future<S0>.value(new S0());
Future<C1> t1Instance = new Future.value(new C1());
const t1Default = const C1();
Future<C1> returnValueFunc() => forgetType(t0Instance);
class ReturnValueTest {
static Future<C1> staticTestMethod() => forgetType(t0Instance);
Future<C1> testMethod() => forgetType(t0Instance);
Future<C1> get testGetter => forgetType(t0Instance);
class ReturnValueGen<X> {
X testMethod() => forgetType(t0Instance);
X get testGetter => forgetType(t0Instance);
main() {
Future<C1> 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<C1>>().testMethod();}, (e) => e is TypeError);
Expect.throws(() {new ReturnValueGen<Future<C1>>().testGetter;}, (e) => e is TypeError);
//# -->