使用 mpirun 运行 Junit 测试，使用 maven surefire

Question

I would like to make some Junit tests using mpirun -n 4 java <relevant arguments> , very similar to what was discussed in this question , but using maven surefire rather than ant.

From the comments in that previous question, it looks like the OP was able to achieve this by creating a dedicated script and having the jvm parameter of the junit part of his ant script reference that script.

My question is : does an equivalent feature exist in maven firesafe? Something that would allow me to change the "java" command used to an arbitrary script? Or should I create a specific ant script to call from maven?

Here is an exerpt of my pom.xml file:

         <plugin>
           <artifactId>maven-surefire-plugin</artifactId>
           <version>2.22.1</version>
           <configuration>
             <!-- Specify a script with a relative path here ? -->
           </configuration>
         </plugin>

Answer 1

After a little work I ended up with quite a different solution than what I was expecting.

I developed my own Junit4 runner which creates the proper mpirun -np X java -cp... command for me and parses the test results of each rank.

As using a custom runner is a standard feature of Junit4, it integrates seamlessly with any environment running Junit tests, including the Maven Surefire (and Failsafe) plugins which were of particular interest for me.

I will not develop the implementation details of how this custom Junit runner works but if you are interested, I just released it on GitHub (website: https://handist.github.io/mpi-junit/ ).