Jacoco.html is empty with 'No class files specified'

ragulra...@gmail.com

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Mar 25, 2020, 4:37:00 AM3/25/20

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Hi All,

I am trying to generate my coverage report using Jacoco plugin - which will in turn generate jacoco.html as output. But the file is empty with the msg stating "No class files specified" like below.

These are the below configuration I have regarding sonar and Jacoco

Jacoco Configuration:

<org.jacoco.version>0.8.5</org.jacoco.version>
      <profile>
            <id>sonar-coverage</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
        <build>
            <plugins>
                <plugin>
                    <groupId>org.sonarsource.scanner.maven</groupId>
                    <artifactId>sonar-maven-plugin</artifactId>
                    <version>3.3.0.603</version>
                </plugin>
            </plugins>
        </build>
    </profile>

    <profile>
        <id>jacoco</id>
        <build>
            <plugins>
                <plugin>
                    <groupId>org.jacoco</groupId>
                    <artifactId>jacoco-maven-plugin</artifactId>
                    <version>${org.jacoco.version}</version>
                    <configuration>
                        <append>true</append>
                    </configuration>
                    <executions>
                        <execution>
                            <id>agent-for-unit-test</id>
                            <goals>
                                <goal>prepare-agent</goal>
                            </goals>
                        </execution>
                        <execution>
                            <id>agent-for-integration-test</id>
                            <phase>verify</phase>
                            <goals>
                                <goal>prepare-agent-integration</goal>
                            </goals>
                        </execution>
                        <execution>
                            <id>jacoco-site</id>
                            <phase>verify</phase>
                            <goals>
                                <goal>report</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>

Sonar Configuration:

<sonar.language>java</sonar.language>
<sonar.verbose>true</sonar.verbose>
<sonar.sourceEncoding>UTF-8</sonar.sourceEncoding>
<sonar.java.source>8</sonar.java.source>
<sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>

Am I missing any configuration related to the Jacoco plugin?

Evgeny Mandrikov

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Mar 25, 2020, 7:01:26 AM3/25/20

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Hi,

Your partial snippet of configuration is not different from many others that work. Why do you exclude the possibility that your problem lies outside of this partial configuration?

Partial snippets are not debuggable.

Please stop asking about partial snippets and always provide a complete example.

And BTW configuration for Sonar has nothing to do with the generation of JaCoCo HTML report.

ragul rangarajan

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Mar 26, 2020, 12:10:49 PM3/26/20

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Hi team,

sorry, Evgeny for the partial snippet.

Now I upload the sample module with my Jacoco configuration in Github.

https://github.com/Ragulrangarajan/MathOperationJacoco

In my analysis, I could see the below behavior.

With the pom.xml https://github.com/Ragulrangarajan/MathOperationJacoco/blob/master/pom.xml, I could generate the Jacoco.html as expected.

The page shows as empty with the msg stating "No class files specified" as below.

But when we remove the <include>..</include> from the plugin configuration I could see the Jacoco report as expected.

I am a bit confused about the above behavior. Can you please help on this to clarify this behavior?

Or Am I missing something?

Thanks and Regards,

Ragul

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Evgeny Mandrikov

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Mar 26, 2020, 12:18:36 PM3/26/20

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Did you tried to read the documentation

https://www.jacoco.org/jacoco/trunk/doc/prepare-agent-mojo.html#includes

https://www.jacoco.org/jacoco/trunk/doc/report-mojo.html#includes

?

Your

<groupId>org.jacoco</groupId>

<artifactId>jacoco-maven-plugin</artifactId>

<version>${jacoco.version}</version>

<include>math.operation</include>

</includes>

</configuration>

Configures both mojos at the same time with pattern that doesn't match nor class names, nor class files.

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ragul rangarajan

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Mar 27, 2020, 11:51:20 AM3/27/20

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Thanks, Evgeny for the messed pattern. (Corrected now)

But I also able to see the include-pattern should be MavenName / FileName - math/operation/* (Jacoco report was generated)

and not as JavaName: math.operation.* (Jacoco report not generated)

After using MavenName in include-pattern now my report is generated. Hope this is the expected behavior.

Thanks and Regards,

Ragul

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Evgeny Mandrikov

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Apr 4, 2020, 6:52:05 AM4/4/20

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On Friday, March 27, 2020 at 4:51:20 PM UTC+1, ragul rangarajan wrote:

Thanks, Evgeny for the messed pattern. (Corrected now)

But I also able to see the include-pattern should be MavenName / FileName - math/operation/* (Jacoco report was generated)
and not as JavaName: math.operation.* (Jacoco report not generated)

After using MavenName in include-pattern now my report is generated. Hope this is the expected behavior.

This is expected behavior:

as written in https://www.jacoco.org/jacoco/trunk/doc/prepare-agent-mojo.html#includes "prepare-agent-mojo" uses class names

as written in https://www.jacoco.org/jacoco/trunk/doc/report-mojo.html#includes "report" uses file names

<groupId>org.jacoco</groupId>

<artifactId>jacoco-maven-plugin</artifactId>

<version>${jacoco.version}</version>

</configuration>

<id>agent-for-unit-test</id>

<goals>

<goal>prepare-agent</goal>

</goals>

</configuration>

</execution>

<id>jacoco-site</id>

<phase>verify</phase>

<goals>

<goal>report</goal>

</goals>

</configuration>

Thanks and Regards,
Ragul

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