如何解决更新TestFairy插件版本后出现的错误？

Question

当我尝试构建iOS build时，我收到了很多错误。我当前的TestFairy版本是2.0.0。Flutter版本1.22.2。Dart版本2.10.2。

Xcode's output:
↳
    ../../../../../.pub-cache/hosted/pub.dartlang.org/testfairy-2.0.0/lib/testfairy.dart:201:23: Error: This requires the null safety language feature, which is experimental.
    You can enable the experiment using the '--enable-experiment=non-nullable' command line option.
      static Future<String?> getSessionUrl() async {
                          ^
    ../../../../../.pub-cache/hosted/pub.dartlang.org/testfairy-2.0.0/lib/testfairy.dart:416:13: Error: This requires the null safety language feature, which is experimental.
    You can enable the experiment using the '--enable-experiment=non-nullable' command line option.
          String? errorMessage) async {
                ^
    ../../../../../.pub-cache/hosted/pub.dartlang.org/testfairy-2.0.0/lib/testfairy.dart:442:14: Error: This requires the null safety language feature, which is experimental.
    You can enable the experiment using the '--enable-experiment=non-nullable' command line option.
          {String? defaultText,

Answer 1

这是维护者。

版本2.0.0只能在迁移到Dart 2作为开发语言的项目中工作。如果您不想这样做，您可以继续使用最新的Dart 1版本。

dependencies:
  testfairy: ^1.0.25 # Dart 1
  # testfairy: 2.0.0 # Dart 2

对于使用migrate连接到Dart 2的用户，请确保您的项目根目录具有一个类似于this的analysis_options.yaml。重要的部分是top声明中的启用实验。

您还必须在run和test命令中启用相同的实验：

flutter run --enable-experiment=non-nullable --no-sound-null-safety

flutter drive --enable-experiment=non-nullable --no-sound-null-safety -v --target=test_driver/app.dart

Answer 2

确保您遵循了插件的ReadMe文档，然后尝试以下操作。

flutter clean
rm -rf ios/Podfile ios/Podfile.lock pubspec.lock ios/Pods ios/Runner.xcworkspace
flutter packages pub upgrade