Run all tests of a project

[LorenzoBettini]

Is there a way to run all tests of a project or of a directory? Something like what you can do in Eclipse.

Neotest and neotest-java provide something like that but it doesn't work very well.

[mfussenegger]

See #563 (comment)

[LorenzoBettini]

@mfussenegger thank you for the pointer.

I'd like to understand better what's being executed under the hood: from what I understand, the actual launch part is delegated to Eclipse JDT LSP, right? Eclipse itself allows you to run tests from a folder or project. I seem to understand that, instead, the JDT LSP does not provide such a mechanism?

Thanks in advance

[mfussenegger]

nvim-jdtls uses the java extension from vscode-java-test for the test discovery, but also for running them.

If you execute a test, it runs a mainclass org.eclipse.jdt.internal.junit.runner.RemoteTestRunner with args like -version 3 -port 39939 -testLoaderClass org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader -loaderpluginname org.eclipse.jdt.junit4.runtime -test some.example.ClassName:exampleTestMethod

The RemoteTestRunner serves the test output on the -port, and nvim-jdtls connects to it to read the results from it.

As mentioned in the other issue, it would possible to discover the test classes, and then run each in a separate debug session.