CODEWITHSUNDEEP
mavenmaven-3pom.xmlmaven-compiler-plugin
A_Di-Matteo
A_Di-Matteo

Reputation: 27822

Maven compiler Plugin recompiling tests while having maven.test.skip to true

When updating the pom.xml file to use the newer maven-compiler-version, 3.6.0 and passing the -D=maven.test.skip=true option, tests compilation is actually not skipped.

Based on the following sample POM below:

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.sample</groupId>
  <artifactId>sample-compiler</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <build>
    <pluginManagement>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.0</version>
            </plugin>
        </plugins>
    </pluginManagement>
  </build>

  <dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
  </dependencies>
</project>

While setting the maven-compiler-plugin version to the previous 3.5.1 would effectively skip test compilation when invoking:

mvn clean test -Dmaven.test.skip=true

Would produce:

[INFO] --- maven-compiler-plugin:3.5.1:testCompile (default-testCompile) @ sample-compiler ---  
[INFO] Not compiling test sources  
[INFO]  
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ sample-compiler ---  
[INFO] Tests are skipped.

However, when upgrading it to 3.6.0 and invoking the same command as above, we would have:

[INFO] --- maven-compiler-plugin:3.6.0:testCompile (default-testCompile) @ sample-compiler ---
[INFO] Not compiling test sources   
[INFO] Changes detected - recompiling the module!   
[INFO] Compiling 1 source file to C:\data\eclipse-workspace\sample-compiler\target\test-classes  
[INFO]  
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ sample-compiler ---  
[INFO] Tests are skipped.

Note the additional Changes detected - recompiling the module! meaning that the maven.test.skip flag was actually ignored.

Question: is that a regression or is something missing in the process above?

Upvotes: 1

Views: 2353

Answers (1)

A_Di-Matteo
A_Di-Matteo

Reputation: 27822

While trying to post it as a bug report, I actually found it was already reported:

So it is probably a regression, to be further confirmed by the Maven team.

Important to note: the same behavior happens when passing the skip test to the testCompile goal (executed by default via default bindings), as following (overriding its default id, default-testCompile):

<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.0</version>
                <executions>
                    <execution>
                        <id>default-testCompile</id>
                        <configuration>
                            <skip>true</skip>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

Solutions: To fix this issue

  • Revert back to previous version, 3.5.1, or
  • Upgrade to version 3.6.1, now available

Upvotes: 2

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