英文:
How can calls to Histogram<T> and Counter<T> be verified in unit tests?
问题
我想在单元测试中进行断言，以确认遥测计量器 Histogram<T> 和 Counter<T> 是否被调用。如果我有一个对单元测试代码正在调用的计量器实例的引用，是否有一种方法可以检查它并确认是否调用了 Record 或 Add 方法？
英文:
I'd like to make a assertions in unit tests to confirm that the telemetry meters Histogram<T> and Counter<T> are being called. If I have a reference to the meter instance that the unit test code is calling, is there a way to inspect it and confirm that the Record or Add methods are being called or not?
答案1
得分: 2
你无法直接测试它们，但我认为它们不应该以这种方式进行测试。
您可以创建一个MetricsListener，它可以监听特定的指标，并验证您获得了正确的结果，而不是正确的值被传递。通过这种方式，您可以传递一个具有特定自动生成名称的指标，然后对其进行断言。类似于您测试Activity的方式。
英文:
You can't test them directly, however, I don't think that's the way that they should be tested.
You can create a MetricsListener that can listen to a specific metric and verify that you get the right outcome rather than the right value is passed. With this, you can pass in a Metric with a specific auto-generated name that you can assert against. Similar to the way that you'd test for Activity.
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