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https://issues.apache.org/jira/browse/SUREFIRE-1262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17090783#comment-17090783
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Pavel_K commented on SUREFIRE-1262:
-----------------------------------

[~rfscholte] I wouldn't advice to put all modules on module-path as there are a 
lot of libraries that don't work well there. Put only those that are required 
in module-info of the module that is being tested and in module-info of its 
dependencies. 

Let's think this way - on module path we put only those jar that either have 
module-info or are required in module-info (so some module is going to use it 
as automatic module).  

For example, foo.jar has module-info and requires bar.jar. Bar.jar doesn't have 
module-info and it uses baz.jar. Baz.jar doesn't have module-info. So, foo.jar 
(explicit module), bar.jar (automatic module) are on module-path, baz is on 
class-path (unnamed module).

> Add modulepath support
> ----------------------
>
>                 Key: SUREFIRE-1262
>                 URL: https://issues.apache.org/jira/browse/SUREFIRE-1262
>             Project: Maven Surefire
>          Issue Type: Improvement
>            Reporter: Robert Scholte
>            Assignee: Tibor Digana
>            Priority: Major
>             Fix For: 2.21.0
>
>
> With the Jigsaw project Java9 is extended with a modulepath. This means that 
> surefire should be executed in a different way.
> When working with a modulepath, the Classpath in the MANIFEST of the 
> executable jar will be ignored, you need need to add everything on 
> commandline. 
> Just like javadoc, the java executable has an {{@<file>}} option, where you 
> can add arguments per line. So this is the new preferred way to build the 
> module-path.
> IIUC for surefire it is important to add {{--patch-module 
> target/test-classes}} (was: -Xpatch) which makes it possible to use the same 
> packages as target/classes.



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