How to deal with the test data in Junit?

Question

In TDD(Test Driven Development) development process, how to deal with the test data? Assumption that a scenario, parse a log file to get the needed column. For a strong test

Answer 1

getClass().getClassLoader().getResourceAsStream("....xml");

inside the test worked for me. But

getClass().getResourceAsStream("....xml");

didn't worked. Don't know why but maybe it helps some others.