[infinispan-dev] PSA: How to debug an integration test

[Galder Zamarreno]

Thanks Dan!!

On Wed, Nov 21, 2018 at 5:14 PM Dan Berindei <dan.berindei at gmail.com> wrote:

> I had to debug some JMX stuff today and I remembered that Gustavo wanted a
> guide for debugging ITs, so here goes:
>
> 1. Build the server
>
> mvn install -DskipTests -am -pl server/integration/testsuite
>
> 2. Unpack the server in the testsuite module
>
> mvn test -pl server/integration/testsuite
>
> 3. Try to run the IT from the IDE, it should fail because it can't find
> the server definition
>
> 4. Check the @RunningServer references at the top of the IT and search for
> them in arquillian.xml. E.g. JmxManagementIT uses "jmx-management-1", which
> is defined under
>
> <group qualifier="suite-manual">
>
> 5. Add -Darquillian.launch=<group qualifier> to your debug configuration
>
> 6. Your test should run now. I got an error about env.JAVA_HOME not being
> defined, I just added a JAVA_HOME environment variable in the debug
> configuration and it worked.
>
> The Arquillian server configuration may need other system properties.
> IntelliJ automatically picks up the system properties set in the failsafe
> execution [1] when it imports the project, but you may have to set them
> manually in your debug configuration.
>
> Now that the test runs, we can try to debug the server.
>
> 7. Define a remote debug configuration. Preferably is should be in listen
> mode: IntelliJ 2018.3.Beta1+ can automatically restart listening after a
> debug session is over, so you only have to start the remote debug
> configuration once.
>
> 8. Search for the server in arquillian.xml again and add the connection
> string from the remote debug configuration, e.g.
>
>         <container qualifier="jmx-management-1" mode="manual">
>             <configuration>
>                 ...
>                 <property name="javaVmArguments">
>                    ....
>
> -agentlib:jdwp=transport=dt_socket,server=n,address=localhost:5005
>
> 9. Set a breakpoint in the server and start the test debug configuration.
> Your remote debug session should stop at the breakpoint.
>
> HTH
> Dan
>
> [1]:
> https://github.com/infinispan/infinispan/blob/8fb4a6a9d168b0d4fb4d709f524585d8708242ac/server/integration/testsuite/pom.xml#L822
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