Python unittest TestCase setUp and tearDown behavior

output.txt

============================= test session starts ==============================
platform linux -- Python 3.6.3, pytest-3.3.1, py-1.5.0, pluggy-0.6.0
rootdir: /tmp/tmp.qJ0GaB9IXd/build, inifile:
plugins: cov-2.5.1
collected 5 items

test.py .....                                                            [100%]

==================================== PASSES ====================================
_________________________________ Test1.test_1 _________________________________
_________________________________ Test1.test_2 _________________________________
_________________________________ Test2.test_1 _________________________________
_________________________________ Test2.test_2 _________________________________
_____________________________ test_print_messages ______________________________
----------------------------- Captured stdout call -----------------------------
I'm Test1.setUpClass called with class Test1
I'm Parent.setUpClass called with class Test1
I'm Test1.setUp called with instance 0x0x7f3b3a3abb00 of class Test1
I'm Parent.setUp called with instance 0x0x7f3b3a3abb00 of class Test1
I'm Test1.test_1 called with instance 0x0x7f3b3a3abb00 of class Test1
I'm Test1.tearDown called with instance 0x0x7f3b3a3abb00 of class Test1
I'm Parent.tearDown called with instance 0x0x7f3b3a3abb00 of class Test1
I'm Test1.setUp called with instance 0x0x7f3b3a3abcf8 of class Test1
I'm Parent.setUp called with instance 0x0x7f3b3a3abcf8 of class Test1
I'm Test1.test_2 called with instance 0x0x7f3b3a3abcf8 of class Test1
I'm Test1.tearDown called with instance 0x0x7f3b3a3abcf8 of class Test1
I'm Parent.tearDown called with instance 0x0x7f3b3a3abcf8 of class Test1
I'm Test1.tearDownClass called with class Test1
I'm Parent.tearDownClass called with class Test1
I'm Test2.setUpClass called with class Test2
I'm Parent.setUpClass called with class Test2
I'm Test2.setUp called with instance 0x0x7f3b3a3abda0 of class Test2
I'm Parent.setUp called with instance 0x0x7f3b3a3abda0 of class Test2
I'm Test2.test_1 called with instance 0x0x7f3b3a3abda0 of class Test2
I'm Test2.tearDown called with instance 0x0x7f3b3a3abda0 of class Test2
I'm Parent.tearDown called with instance 0x0x7f3b3a3abda0 of class Test2
I'm Test2.setUp called with instance 0x0x7f3b3a3abe48 of class Test2
I'm Parent.setUp called with instance 0x0x7f3b3a3abe48 of class Test2
I'm Test2.test_2 called with instance 0x0x7f3b3a3abe48 of class Test2
I'm Test2.tearDown called with instance 0x0x7f3b3a3abe48 of class Test2
I'm Parent.tearDown called with instance 0x0x7f3b3a3abe48 of class Test2
I'm Test2.tearDownClass called with class Test2
I'm Parent.tearDownClass called with class Test2
=========================== 5 passed in 0.02 seconds ===========================

test.py

import unittest
import functools

log = []

def whoami(f):
    @functools.wraps(f)
    def wrapper(self):
        if isinstance(self, type):
            log.append(f"I'm {f.__qualname__} called with class "
                       f"{self.__qualname__}")
        else:
            log.append(f"I'm {f.__qualname__} called with instance "
                       f"0x{hex(id(self))} of class "
                       f"{self.__class__.__qualname__}")

        return f(self)
    return wrapper

class Parent(unittest.TestCase):
    @classmethod
    @whoami
    def setUpClass(cls):
        super().setUpClass()
    @classmethod
    @whoami
    def tearDownClass(cls):
        super().tearDownClass()
    @whoami
    def setUp(self):
        super().setUp()
    @whoami
    def tearDown(self):
        super().tearDown()

class Test1(Parent):
    @classmethod
    @whoami
    def setUpClass(cls):
        super().setUpClass()
    @classmethod
    @whoami
    def tearDownClass(cls):
        super().tearDownClass()
    @whoami
    def setUp(self):
        super().setUp()
    @whoami
    def tearDown(self):
        super().tearDown()

    @whoami
    def test_1(self):
        pass

    @whoami
    def test_2(self):
        pass

class Test2(Parent):
    @classmethod
    @whoami
    def setUpClass(cls):
        super().setUpClass()
    @classmethod
    @whoami
    def tearDownClass(cls):
        super().tearDownClass()
    @whoami
    def setUp(self):
        super().setUp()
    @whoami
    def tearDown(self):
        super().tearDown()

    @whoami
    def test_1(self):
        pass

    @whoami
    def test_2(self):
        pass

def test_print_messages():
    for msg in log:
        print(msg)