Jacoco Report missing

Question

I'm trying to create a jacoco report on my project. The project is in java 12 version and the jacoco-maven-plugin is on version 0.8.5.

            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.8.5</version>
                <executions>
                    <execution>
                        <id>pre-unit-test</id>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>post-unit-test</id>
                        <phase>test</phase>
                        <goals>
                            <goal>report</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

I launch a mvn clean site

mvn clean install site

And I obtain:

[INFO] --- jacoco-maven-plugin:0.8.5:prepare-agent (pre-unit-test) @ bowling-game ---
[INFO] argLine set to -javaagent:/home/baptiste/.m2/repository/org/jacoco/org.jacoco.agent/0.8.5/org.jacoco.agent-0.8.5-runtime.jar=destfile=/home/baptiste/IdeaProjects/Bowling-Game/target/jacoco.exec

...
[INFO] --- maven-surefire-plugin:2.22.1:test (default-test) @ bowling-game ---
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.keywer.kata.bowling.game.frame.state.FrameStateTest
[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.064 s - in com.keywer.kata.bowling.game.frame.state.FrameStateTest
[INFO] Running com.keywer.kata.bowling.game.BowlingGameTest
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 s - in com.keywer.kata.bowling.game.BowlingGameTest
...
[INFO] --- jacoco-maven-plugin:0.8.5:report (post-unit-test) @ bowling-game ---
[INFO] Skipping JaCoCo execution due to missing execution data file.

I'm looking for the report but indeed it was not created, due to the following line:
[INFO] Skipping JaCoCo execution due to missing execution data file.

What I have forget ?

bmeynier · Accepted Answer · 2021-01-27 19:00:53Z

6

My project is write in java 12 version and I enabled preview feature like this.

<plugin>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.22.1</version>
    <configuration>
      <argLine>--enable-preview</argLine> <=== This line
    </configuration>
</plugin>

The issue was that maven was not able to generate jacoco.exec.

I find the awnser thanks to @Jacek Laskowski with this comment https://stackoverflow.com/a/23605812/8591625

I just replace by

<plugin>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.22.1</version>
    <configuration>
       <argLine>${argLine} --enable-preview</argLine> <=== Here I adding ${argLine} in order to not override argument
    </configuration>
</plugin>

edited Jan 27, 2021 at 19:00

user479288

answered Oct 20, 2019 at 13:26

bmeynier

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