雅各布 - “由：java.lang.类不发现例外：org.jacoco.agent.rt.internal_6da5971。离线”

Question

尝试通过jacoco为maven项目使用离线检测（由于powermock测试用例，无法使用即时检测）获得覆盖率。提花剂补充道。surefire插件中的jar到类路径，如下所示。将“org.jacoco.agent-0.7.7.201606060606-runtime.jar”（从本地maven存储库）重命名为“jacocoagent.jar”，并将其保存在该pom所在的同一文件夹中。xml正在驻留。即使在将其添加到classpath之后，我还是遇到了下面的异常。

pom的片段。xml（surefire-插件配置）

       <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-surefire-plugin</artifactId>
             <configuration>
                     <forkmode>once</forkmode>
                    <additionalClasspathElements>
            <additionalClasspathElement>jacocoagent.jar</additionalClasspathElement>
                                        </additionalClasspathElements>
              </configuration>
     </plugin>

控制台上出现异常:

#############
Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

-----------------------------------------------------

        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:166)
        ... 21 more
Caused by: java.lang.NoClassDefFoundError: org/jacoco/agent/rt/internal_6da5971/Offline
        at com.cisco.ise.ups.modelframework.hibernate.OracleNamingStrategy.$jacocoInit(OracleNamingStrategy.java)
        at com.cisco.ise.ups.modelframework.hibernate.OracleNamingStrategy.<clinit>(OracleNamingStrategy.java)
        at sun.misc.Unsafe.ensureClassInitialized(Native Method)
        at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:43)
        at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:142)
        at java.lang.reflect.Field.acquireFieldAccessor(Field.java:1082)
        at java.lang.reflect.Field.getFieldAccessor(Field.java:1063)
        at java.lang.reflect.Field.get(Field.java:387)
        at com.cisco.ise.ups.build.WorkflowRunnerMojo.namingStrategyInstance(WorkflowRunnerMojo.java:335)
        at com.cisco.ise.ups.build.WorkflowRunnerMojo.setupWorkflowEnvironment(WorkflowRunnerMojo.java:514)
        at com.cisco.ise.ups.build.WorkflowRunnerMojo.execute(WorkflowRunnerMojo.java:816)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        ... 21 more
Caused by: java.lang.ClassNotFoundException: org.jacoco.agent.rt.internal_6da5971.Offline
        at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
        ... 33 more
[ERROR]
###############

遵循的步骤：

1. “mvn编译”。
2. “mvn-org.jacoco:jacoo-maven-plugin:instrument”
3. “mvn test”-此步骤中出现异常

请让我知道如何摆脱这个异常？这是添加类路径的正确位置吗？？(在surefire插件中)还是应该在某个地方指定？？

谢谢。

Answer 1

Macphail博士关于获得声纳JaCoCo PowerMock的恍惚文章为我做了这项工作：

  <!-- Provide information for coverage per test -->
  <profile>
     <id>coverage-per-test</id>
     <build>
        <plugins>
           <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-surefire-plugin</artifactId>
              <version>2.20</version>
              <configuration>
                 <argLine>${argLine} -Xverify:none</argLine>
                 <properties>
                    <property>
                       <name>listener</name>
                       <value>org.sonar.java.jacoco.JUnitListener</value>
                    </property>
                 </properties>
              </configuration>
           </plugin>
        </plugins>
     </build>

     <dependencies>
        <dependency>
           <groupId>org.sonarsource.java</groupId>
           <artifactId>sonar-jacoco-listeners</artifactId>
           <version>4.9.0.9858</version>
           <scope>test</scope>
        </dependency>
     </dependencies>
  </profile>

如博文评论区所述：

如果您的默认argLine不“简单”,您可能需要使用以下代码片段:

{argLine} -XX：-UseSplitVerifier

否则，您可能会遇到ClassNotFoundException-例如java.lang.ClassNotFoundException：org.jacoco.agent.rt.RT

Answer 2

surefire插件上的类路径内容不是必需的。您需要向每个具有测试的模块添加依赖项，如下所示：

<dependency>
    <groupId>org.jacoco</groupId>
    <artifactId>org.jacoco.agent</artifactId>
    <classifier>runtime</classifier>
    <scope>test</scope>
    <version>${your.jacoco.version}</version>
</dependency>

请确保不要错过“分类器”部分，否则它将无法工作。

PowerMock项目的完整示例