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// 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
import "../../Utils/expect.dart";
List getAList(
String engineDartPath, List? extraFrontEndOptions, String mainPath) {
[engineDartPath, "--target=flutter", ...?extraFrontEndOptions, mainPath]);
main() {
Expect.listEquals(["enginePath", "--target=flutter",
"--option1", "--option2", "--option3", "mainPath"],
"enginePath", ["--option1", "--option2", "--option3"], "mainPath"));
Expect.listEquals(["enginePath", "--target=flutter", "mainPath"],
getAList("enginePath", null, "mainPath"));