Not able to use junit5-system-exit

Question

I'm trying to write some unit tests for a command line application which makes use of System.exit(1) to signal a failed execution.

Since we are using Java 21, in order to avoid problems with the security manager as described here, we thought about using the approach proposed here, which uses the junit5-system-exit extension (site; GitHub).

Following the instructions from GitHub, my pom.xml looks like:

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>21</maven.compiler.source>
    <maven.compiler.target>21</maven.compiler.target>
    <argLine/>
</properties>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.junit</groupId>
            <artifactId>junit-bom</artifactId>
            <version>5.11.3</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.ginsberg</groupId>
        <artifactId>junit5-system-exit</artifactId>
        <version>2.0.2</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <artifactId>maven-dependency-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>properties</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>3.5.2</version>
            <configuration>
                <argLine>@{argLine} -javaagent:${com.ginsberg:junit5-system-exit:jar}</argLine>
            </configuration>
        </plugin>
    </plugins>
</build>

However, when I execute the tests, it fails with the following message:

java.lang.IllegalStateException: SystemExitExtension Agent not loaded, please see documentation

So, it seems that I'm not able to configure Surefire properly. I have tried different approaches, but without luck. What am I doing wrong?

Answer 1

I managed to make the extension work by changing the pom.xml.

Instead of using <dependencyManagement>, I imported the dependency directly to junit-jupiter-api. I also updated its version to 5.12.0.

I don't know if it was the pom.xml change, or if the previous version was corrupted in our local repository, but the fact is that now when I run maven, it works nicely and I'm able to test the system.exit calls.