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microsoft / vscode-java-test

Run and debug Java test cases in Visual Studio Code.
https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-java-test
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VS Code in the browser: Test Runner fails to run the first time, but runs fine the second time #1650

Closed firasm closed 7 months ago

firasm commented 7 months ago

Hello,

My colleagues and I are trying to use the "Test Runner for Java" extension in a workspace using VS Code in the browser (specifically the code-server project).

We are trying to troubleshoot a really strange issue that only shows up in the cloud, and not when trying to run things locally.

Here is a very very simple Java project that when it's run in the browser, gives a Class not found model.SampleTest error.

Screenshot 2024-01-18 at 8 56 46 PM

However, when you do nothing else except just run the test one more time, it works just fine:

Screenshot 2024-01-18 at 8 57 03 PM

This happens for every project that's run in the cloud this way, so we are nearly 100% sure that it's got something to do with being execute remotely. The stack trace seems useful, but it's not something that gives me any insight so I thought I'd post here to ask for help in troubleshooting!

Class not found model.ProjectInNeedTest
java.lang.ClassNotFoundException: model.ProjectInNeedTest
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
BuiltinClassLoader.java:581
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
ClassLoaders.java:178
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527)
ClassLoader.java:527
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClass(RemoteTestRunner.java:766)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClasses(RemoteTestRunner.java:490)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:513)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)

I'll be cross-posting this in the code-server project to get some more eyes on it...

jdneo commented 7 months ago

What if you run it in GitHub Codespaces, will the same error happens for the first test execution?

firasm commented 7 months ago

I just tried it - and no, I cannot reproduce it in GitHub Codespaces, it runs fine the first time.

Screenshot 2024-01-18 at 11 32 57 PM

I assume this means the issue is likely somewhere in code-server configuration?

jdneo commented 7 months ago

I'm not familiar with Code Server, seems like yes.

Maybe some filesystem issue that the .class file is not discovered? I dont know...

firasm commented 7 months ago

Fair enough - I'll close this for now and hope someone there can help. Thanks for the fast reply!