如何在 Flutter 中测试私有函数/方法? [英] How to test private functions/methods in Flutter?

问题描述

我目前正在开发一个使用 bloc 架构的应用程序.我的集团专门使用流与 UI 进行通信.因此，除了构造函数之外，它的所有方法都是私有的(它们以_"开头).

I'm currently developing an app that uses the bloc architecture. My bloc is using streams exclusively to communicate with the UI. Therefore all its methods except for the constructor are private ( they start by '_').

所以问题是如何从文本包中的测试类中测试 bloc 的私有方法，使其无法访问其他包的私有方法.

So the question is how can I test the bloc's private methods from the test class that lives in the text package so it cannot access private methods of other packages.

谢谢

推荐答案

你不能，但你可以将它们公开并使用 @visibleForTesting 对其进行注释，以便在从不在同一库或 test/

You can't, but you can make them public and annotate it with @visibleForTesting to get an DartAnalyzer warning when they are accessed from code that is not in in the same library or in test/

https://github.com/dart-lang/sdk/blob/master/pkg/meta/lib/meta.dart#L224-L233

/// Used to annotate a declaration was made public, so that it is more visible
/// than otherwise necessary, to make code testable.
///
/// Tools, such as the analyzer, can provide feedback if
///
/// * the annotation is associated with a declaration not in the `lib` folder
///   of a package, or
/// * the declaration is referenced outside of its the defining library or a
///   library which is in the `test` folder of the defining package.

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