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Fixed the CLA and created a bug report. Also, opened an account in bugs.python.org.

(1) Why is the result useful when no test was executed?
(2) This PR is missing a test.

1. The problem is that when I'm trying to collect test results if one of the tests is being skipped the error below pops up because test_result object is None.

AttributeError: 'NoneType' object has no attribute 'testsRun'

import unittest 
import json


class TestResultCollector(unittest.TestCase):

    @classmethod
    def setResult(cls, total, errors, failures):
        cls.total, cls.errors, cls.failures = \
                total, errors, failures

    @classmethod
    def tearDownClass(cls):
        json_res = {
                'total': cls.total,
                'errors': cls.errors,
                'failures': cls.failures
                }
        print(json.dumps(json_res))

    def test1(self):
        self.assertTrue(True)

    def test2(self):
        self.assertTrue(True) 

    def test3(self):
        self.assertTrue(True)

    @unittest.skip('Skip Test')
    def test4(self):
        self.assertTrue(True)

    def run(self, result=None): 
        test_result = super().run(result)
        total = test_result.testsRun
        errors = len(test_result.errors)
        failures = len(test_result.failures)
        self.setResult(total, errors, failures)

if __name__ == '__main__':
        unittest.main()

2. I will add a unittest for this test case if you think this is a valid change. @iritkatriel

I think it is a valid change. Please resolve conflicts and add tests.

Closing in favor of GH-28030.