I am unable to get the code coverage in Java 11 for Powermock tests using Jacoco maven plugin. My version details are as below:
Java version: jdk-11.0.2
Maven version: maven 3.5.2
Jacoco maven plugin version: 0.8.5
Powermock version: 2.0.0-beta.5
I have also added the jacoco runtime agent as we are supposed to in the classpath of all the subprojects:
<dependencies>
<!-- Added to provide jacocoagent in classpaths for offline instrumentation builds
Refer https://www.jacoco.org/jacoco/trunk/doc/offline.html -->
<dependency>
<groupId>org.jacoco</groupId>
<artifactId>org.jacoco.agent</artifactId>
<classifier>runtime</classifier>
<scope>test</scope>
<version>${jacoco.plugin.version}</version>
</dependency>
</dependencies>
These are my plugin details (Please note that these settings work absolutely fine in Java 8):
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<!-- Skips unit tests if the value of skipTests property is true -->
<skipTests>${skipTests}</skipTests>
<!-- Excludes integration tests when unit tests are run -->
<excludes>
<exclude>**/IT*.java</exclude>
</excludes>
<systemPropertyVariables>
<jacoco-agent.destfile>${project.build.directory}/target/jacoco.exec</jacoco-agent.destfile>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<configuration>
<append>true</append>
<destFile>${user.dir}/target/jacoco.exec</destFile>
<excludes>
<exclude>*</exclude>
</excludes>
<dataFile>${user.dir}/target/jacoco.exec</dataFile>
<outputDirectory>${user.dir}/target/coverage-reports/jacoco</outputDirectory>
</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>jacoco-site</id>
<phase>package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
Result:
[INFO] --- jacoco-maven-plugin:0.8.5:instrument (default-instrument) @ utils ---
[WARNING] The POM for org.codehaus.plexus:plexus-utils:jar:1.1 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO]
[INFO] --- jacoco-maven-plugin:0.8.5:restore-instrumented-classes (default-restore-instrumented-classes) @ utils ---
[INFO]
[INFO] --- jacoco-maven-plugin:0.8.5:report (jacoco-site) @ utils ---
[INFO] Skipping JaCoCo execution due to missing execution data file.
As you can see the jacoco.exec file is not being generated in case of offline instrumentation.
Please note that I am able to generate jacoco.exec file when I am not using offline instrumentation (i.e. using the prepare-agent goal) however it ignores the PowerMock tests.
As per this issue: https://github.com/jacoco/jacoco/issues/663
Support for Java 11 has been provided in version 0.8.3 however I am not sure if any changes were made in the offline instrumentation that is causing any issue.
Please advise if anything else is required from my end.
Along with offline instrument, also make sure the correct version has been set to the -source and -target of the Java Compiler. This also impacts the coverage report as sometime only offline instrument settings doesn't help to get power mock test coverages.