unit-testing - 如何使用 scalamock lib 模拟 org.apache.spark.streaming.State？

Question

我为 Spark.streaming.mapWithState 的“更新函数”编写了一个单元测试，我需要模拟“org.apache.spark.streaming.State”参数，但它是一个密封类，编译器抱怨一个异常：从密封的非法继承类状态。我应该如何测试我的功能？

Answer 1

A sealed trait can only be extended in the same source file as it's declared. So Scalamock has no chance of mocking this type.