JaCoCo can not instrument classes which is already instrumented by Jmockit

最新推荐文章于 2023-02-13 13:37:32 发布

原创最新推荐文章于 2023-02-13 13:37:32 发布 · 7.9k 阅读

3 ·

CC 4.0 BY-SA版权

Jacoco(Maven Plugin) 专栏收录该内容

7 篇文章

订阅专栏

本文探讨了Sonar 3.5结合JaCoCo进行代码覆盖率分析时遇到的问题，特别是JaCoCo与JMockit同时使用导致的类文件重复Instrument异常。文中提供了通过配置Maven JaCoCo插件来解决此问题的方法。

Here is what I have:

1) Sonar 3.5 which uses JaCoCo as coverage tool.

2) Jmockit lib to perform testing with use of mocks.

3) Build process automized with maven.

Jmockit seems to instrument classes it need.
JaCoCo can not instrument classes which is already instrumented by Jmockit and spits out a HUGE amount of exceptions, saying that it's impossible to instrument class, which were already instrumented. However Sonar seems to have a valid output for such a scenario.
So first question is: can I somehow suppress such an exceptions? It is really critical because the size of the log file on our CI system achieves 50Mb (!), which is not acceptable. A lot of free space is just eaten up by such a logs on our CI machine.

Here are the exceptions I've got:

java.lang.instrument.IllegalClassFormatException: Error while instrumenting class app/MyClass.
Caused by: java.lang.IllegalStateException: Class app/MyClass is already instrumented.

Assuming that suppression of such an exceptions is impossible I investigated it a little bit and found out that JaCoCo (a tool, which Sonar uses and a tool, which can't instrument already instrumented classes) have such a mode as

offline
 instrumentation

(AFAIK Sonar neither support this

offline
 instrumentation

or can suppress such a warnings). This thing is designed to be used exactly for such a cases. So I tried to set up JaCoCo as a plugin in maven, but I failed to do this cause JaCoCo can't find some execution file. When I'm running

mvn
 clean install

the following error pops up:

[INFO] --- jacoco-maven-plugin:0.6.2.201302030002:report (report) @ webservice-mws ---

[INFO] Skipping JaCoCo execution due to missing execution data file

解决方法：
在jacoco 中添加：

<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>${jacoco.version}</version>
<configuration>
  <excludes>
      <exclude>com.cloud.generated.*</exclude>
  </excludes>
  <skip>${jacoco.skip.instrument}</skip>
</configuration>
<executions>
<execution>
<id>default-instrument</id>
<goals>
<goal>instrument</goal>
</goals>
</execution>
<execution>
<id>default-restore-instrumented-classes</id>
<goals>
<goal>restore-instrumented-classes</goal>
</goals>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>

不然只能使用
Cobertura 插件，因为jacoco和 mock存在很多不兼容的地方。