Test instance deletion (pytest runner, both pytest style class and xUnit)

gistfile1.py

from __future__ import unicode_literals
import weakref
from coilib50 import unittest

class Test(unittest.TestCase):

    _TESTS = []

    def test_01(self):
        Test._TESTS.append(weakref.ref(self))

    def test_02(self):
        import gc
        gc.collect()
        self.assertEqual(len(Test._TESTS), 1)
        self.assertIsNone(Test._TESTS[0]())


class Test2(object):

    _TESTS = []

    def test_pytest01(self):
        Test2._TESTS.append(weakref.ref(self))

    def test_pytest02(self):
        import gc
        gc.collect()
        assert len(Test2._TESTS) == 1
        assert Test2._TESTS[0]() is None