Junit before class ( non static )

Question

Are there any best practices to get Junit execute a function once in a test file , and it should also not be static.

like @BeforeClass on non static fun

Answer 1

Just use @BeforeClass:

@BeforeClass
public static void init() {
}

It doesn't make sense for init to be non-static because each test is run in a separate instance. The instance that init is run on would not match the instance of any test.

The only reason that you might want it to be non-static is to override it in subclasses, but you can do this with static methods too. Just use the same name, and only the subclass init method will be called.