| // 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 To handle these gracefully, we support a [...?] "null-aware |
| * spread" operator. In cases where the spread expression evaluates to [null], |
| * that expands to an empty collection instead of throwing a runtime expression. |
| * |
| * That turns the example to: |
| * |
| * var command = [ |
| * engineDartPath, |
| * '--target=flutter', |
| * ...?extraFrontEndOptions, |
| * mainPath |
| * ]; |
| * @description Checks that spreadable element of the [List] can be null-aware |
| * and example from the Spec works correctly. |
| * @author iarkh@unipro.ru |
| */ |
| |
| import "../../Utils/expect.dart"; |
| |
| List getAList( |
| String engineDartPath, List? extraFrontEndOptions, String mainPath) { |
| return( |
| [engineDartPath, "--target=flutter", ...?extraFrontEndOptions, mainPath]); |
| } |
| |
| main() { |
| Expect.listEquals(["enginePath", "--target=flutter", |
| "--option1", "--option2", "--option3", "mainPath"], |
| getAList( |
| "enginePath", ["--option1", "--option2", "--option3"], "mainPath")); |
| Expect.listEquals(["enginePath", "--target=flutter", "mainPath"], |
| getAList("enginePath", null, "mainPath")); |
| } |
