| // 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. |
| |
| // test w/ `dart test -N null_closures` |
| |
| import 'dart:async'; |
| import 'dart:core'; |
| |
| class A extends B { |
| A(int x); |
| } |
| class B extends A {} |
| |
| //https://github.com/dart-lang/linter/issues/1414 |
| void test_cycle() { |
| new A(null); |
| } |
| |
| void list_firstWhere() { |
| // firstWhere has a _named_ closure argument. |
| <int>[2, 4, 6].firstWhere((e) => e.isEven, orElse: null); // LINT |
| <int>[2, 4, 6].firstWhere((e) => e.isEven, orElse: () => null); // OK |
| <int>[2, 4, 6].where(null); // LINT |
| <int>[2, 4, 6].where((e) => e.isEven); // OK |
| } |
| |
| void iterable_singleWhere() { |
| // singleWhere has a _named_ closure argument. |
| <int>{2, 4, 6}.singleWhere((e) => e.isEven, orElse: null); // LINT |
| <int>[2, 4, 6].singleWhere((e) => e.isEven, orElse: () => null); // OK |
| } |
| |
| void map_putIfAbsent() { |
| // putIfAbsent has a _required_ closure argument. |
| var map = <int, int>{}; |
| map.putIfAbsent(7, null); // LINT |
| map.putIfAbsent(7, () => null); // OK |
| } |
| |
| void future_wait() { |
| // Future.wait is a _static_ function with a _named_ argument. |
| Future.wait([], cleanUp: null); // LINT |
| Future.wait([], cleanUp: (_) => print('clean')); // OK |
| } |
| |
| void list_generate() { |
| // List.generate is a _constructor_ with a _positional_ argument. |
| new List.generate(3, null); // LINT |
| new List.generate(3, (_) => null); // OK |
| } |
| |
| void map_otherMethods() { |
| // These methods have nothing we are concerned with. |
| new Map().keys; // OK |
| new Map().addAll({}); // OK |
| } |