java - @BeforeClass and inheritance - order of execution

Question

I have an abstract base class, which I use as a base for my unit tests (TestNG 5.10). In this class, I initialize the whole environment for my tests, setting up database mappings, etc. This abstract class has a method with a @BeforeClass annotation which does the initialization.

Next, I extend that class with specific classes in which I have @Test methods and also @BeforeClass methods. These methods do class-specific initialization of the environment (e.g. put some records into the database).

How I can enforce a specific order of the @BeforeClass annotated methods? I need the ones from the abstract base class to be executed before the ones of the extending class.

Example:

abstract class A {
    @BeforeClass
    doInitialization() {...}
}

class B extends A {
    @BeforeClass
    doSpecificInitialization() {...}

    @Test
    doTests() {...}
}

Expected order:

A.doInitialization
B.doSpecificInitialization
B.doTests

Actual order:

B.doSpecificInitialization // <- crashes, as the base init is missing
(A.doInitialization        // <---not executed
 B.doTests)                // <-/

Answer 1

edit: Answer below is for JUnit, but I will leave it here anyway, because it could be helpful.

According to the JUnit api: "The @BeforeClass methods of superclasses will be run before those the current class."

I tested this, and it seems to work for me.

However, as @Odys mentions below, for JUnit you need to have the two methods named differently though as doing otherwise will result in only the subclass method being run because the parent will be shadowed.