Issue #19013: add unittest.main() epilogs to unittest's own test modules

Lib/unittest/test/test_assertions.py

@@ -361,3 +361,7 @@ class TestLongMessage(unittest.TestCase):
                               ['^"regex" does not match "foo"$', '^oops$',
                                '^"regex" does not match "foo"$',
                                '^"regex" does not match "foo" : oops$'])
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/test_break.py

@@ -282,3 +282,7 @@ class TestBreakSignalIgnored(TestBreak):
     "if threads have been used")
 class TestBreakSignalDefault(TestBreak):
     int_handler = signal.SIG_DFL
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/test_case.py

@@ -1405,3 +1405,7 @@ test case
         with support.disable_gc():
             del case
             self.assertFalse(wr())
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/test_functiontestcase.py

@@ -142,3 +142,7 @@ class Test_FunctionTestCase(unittest.TestCase):
         test = unittest.FunctionTestCase(lambda: None, description=desc)
 
         self.assertEqual(test.shortDescription(), "this tests foo")
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/test_loader.py

@@ -1306,3 +1306,7 @@ class Test_TestLoader(unittest.TestCase):
     def test_suiteClass__default_value(self):
         loader = unittest.TestLoader()
         self.assertTrue(loader.suiteClass is unittest.TestSuite)
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/test_runner.py

@@ -339,3 +339,7 @@ class Test_TextTestRunner(unittest.TestCase):
         f = io.StringIO()
         runner = unittest.TextTestRunner(f)
         self.assertTrue(runner.stream.stream is f)
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/test_setups.py

@@ -501,5 +501,6 @@ class TestSetups(unittest.TestCase):
             with self.assertRaisesRegex(Exception, msg):
                 suite.debug()
 
+
 if __name__ == '__main__':
     unittest.main()

Lib/unittest/test/test_skipping.py

@@ -221,3 +221,7 @@ class Test_TestSkipping(unittest.TestCase):
         suite = unittest.TestSuite([test])
         suite.run(result)
         self.assertEqual(result.skipped, [(test, "testing")])
+
+
+if __name__ == "__main__":
+    unittest.main()