Why don't work Jacoco? I hope I did everything right

Question

https://github.com/Teemitze/TelegramBot

Why is Jacoco statistics not displayed? A warning appears during Assembly

Skipping JaCoCo execution due to missing execution data file.

Answer 1

In your project

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

whereas similarly to many other questions here such as "Jacoco doesn't produce coverage reports" and quoting JaCoCo documentation:

If your project already defines VM arguments for test execution, be sure that they will include property defined by JaCoCo.

One of the ways to do this in case of maven-surefire-plugin - is to use syntax for late property evaluation:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <configuration>
    <argLine>@{argLine} -your -extra -arguments</argLine>
  </configuration>
</plugin>

Another way is to define "argLine" as a Maven property rather than as part of the configuration of maven-surefire-plugin:

<properties>
  <argLine>-your -extra -arguments</argLine>
</properties>
...
<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <configuration>
    <!-- no argLine here -->
  </configuration>
</plugin>