How to change one system property without code or from command line
I'm developing a mocking framework and I need to change the class loader that unit uses to something else (This is due to a property of the API I'm mocking). I found that you can do this reliably in Junit by creating a custom LauncherInterceptor. The problem is that a system property needs to be assigned for this LauncherInterceptor implementation to be found.
I'm therefore wondering if it's possible to set a system property from a library that will later be used during tests for other projects. The user should preferably not have to do anything. Yes, there is the
System.setProperty function, but this requires a class to be loaded for this to work, which might not reliably be the case.4 Replies
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I'm not sure what's the real question, but the spi system was made so that libraries can ensure they run a little code just by being on the classpath without the library user having to load any class.
That seems like the most reasonable approach; to use the service provider interface. Is there a service I can register that will run before class loading of unit tests?
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