Github user mateiz commented on the pull request:
https://github.com/apache/spark/pull/181#issuecomment-38107653
@darabos unfortunately testing this is kind of tricky because we need to
create a .jar with a class that is not normally on the classpath. There's some
TestUtils code to create this in
https://github.com/apache/spark/pull/119/files, which compiles a new class.
Maybe we can get for that to get merged. We can also try to create a dummy JAR
through our own build process and find it, but it will be kind of brittle.
Once we have such a JAR, I'd add a test to FileServerSuite that tries to
use those classes in tasks. This is already used to test that addJar ships the
JAR over.
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