PowerMock with Jacoco使用PreparedForTest坑

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使用JaCoCo进行实时代码覆盖率分析时遇到PowerMock集成难题，由于PowerMock使用Javassist修改类，导致JaCoCo的改动丢失，无法获取代码覆盖率。目前无解决方案，期待未来JaCoCo采用ByteBuddy解决此问题。

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NO WAY TO USER!!!!!

The simplest way to use JaCoCo it is — on-the-fly instrumentation with using JaCoCo Java Agent. In this case a class in modified when it is being loaded. You can just run you application with JaCoCo agent and a code coverage is calculated. This way is used by Eclemma and Intellij Idea. But there is a big issue. PowerMock instruments classes also. Javassist is used to modify classes. The main issue is that Javassist reads classes from disk and all JaCoCo changes are disappeared. As result zero code coverage for classes witch are loaded by PowerMock class loader.

We are going to replace Javassist with ByteBuddy (#727) and it should help to resolve this old issue. But right now there is NO WAY TO USE PowerMock with JaCoCo On-the-fly instrumentation. And no workaround to get code coverage in IDE.