Capture not working for unittest.TestCase subclasses

[nicoddemus]

Not getting the Captured stdout call logs

Test:

# test_subtest.py
import unittest


class PytestSubtestTest(unittest.TestCase):
    def test_subtest_stdout(self):
        for i in range(2):
            with self.subTest(i=i):
                print(f"{i}: Print something to stdout")
                self.assertEqual(0, 1)

Output:

$ pytest -o log_cli=true test_subtest.py

================================================================================ test session starts ================================================================================
platform darwin -- Python 3.7.7, pytest-5.4.3, py-1.8.1, pluggy-0.13.1
rootdir: /Users/w.son/Projects/git.soma.salesforce.com/TESTS/presto-fit-tests/src/test/python
plugins: subtests-0.3.1
collected 1 item

test_subtest.py::PytestSubtestTest::test_subtest_stdout
test_subtest.py::PytestSubtestTest::test_subtest_stdout PASSED                                                                                                                [100%]

===================================================================================== FAILURES ======================================================================================
____________________________________________________________________ PytestSubtestTest.test_subtest_stdout (i=0) ____________________________________________________________________

self = <test_subtest.PytestSubtestTest testMethod=test_subtest_stdout>

    def test_subtest_stdout(self):
        for i in range(2):
            with self.subTest(i=i):
                print(f"{i}: Print something to stdout")
>               self.assertEqual(0, 1)
E               AssertionError: 0 != 1

test_subtest.py:9: AssertionError
____________________________________________________________________ PytestSubtestTest.test_subtest_stdout (i=1) ____________________________________________________________________

self = <test_subtest.PytestSubtestTest testMethod=test_subtest_stdout>

    def test_subtest_stdout(self):
        for i in range(2):
            with self.subTest(i=i):
                print(f"{i}: Print something to stdout")
>               self.assertEqual(0, 1)
E               AssertionError: 0 != 1

test_subtest.py:9: AssertionError
============================================================================== short test summary info ==============================================================================
FAILED test_subtest.py::PytestSubtestTest::test_subtest_stdout - AssertionError: 0 != 1
FAILED test_subtest.py::PytestSubtestTest::test_subtest_stdout - AssertionError: 0 != 1
============================================================================ 2 failed, 1 passed in 0.11s ============================================================================

Originally posted by @dongwoo1005 in #18 (comment)