How to get a test resource file?

Probably just useful if you have the file available, for example when doing unit tests – this will not load it out of a jar AFAIK.

URL url = Thread.currentThread().getContextClassLoader().getResource("mypackage/YourFile.csv");
File file = new File(url.getPath());
// where the file is in the classpath eg. <project>/src/test/resources/mypackage/YourFile.csv