[issue21741] Convert most of the test suite to using unittest.main()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Some abstract test classes now are included in testing:

Lib/test/test_calendar.py: MonthCalendarTestCase
Lib/test/test_csv.py: TestCsvBase
Lib/test/test_funcattrs.py: FuncAttrsTest
Lib/test/test_sys_setprofile.py: TestCaseBase
Lib/test/test_telnetlib.py: ExpectAndReadTestCase
Lib/test/test_thread.py: BasicThreadTest
Lib/test/test_unicodedata.py: UnicodeDatabaseTest
(and may be other)

Lib/test/test_enumerate.py, Lib/test/test_functools.py, Lib/test/test_list.py, 
Lib/test/test_peepholer.py, Lib/test/test_sort.py verified reference counting 
in verbose mode. Now this code is deleted.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21741>
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