Rewrite loading sqlite3 tests

[serhiy-storchaka]

BPO	45181
Nosy	@serhiy-storchaka, @erlend-aasland
PRs	bpo-45181: Simplify loading sqlite3 tests #28304

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-09-13.11:20:36.538>
created_at = <Date 2021-09-13.07:10:10.869>
labels = ['type-feature', 'tests', '3.11']
title = 'Rewrite loading sqlite3 tests'
updated_at = <Date 2021-09-13.11:20:36.537>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2021-09-13.11:20:36.537>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2021-09-13.11:20:36.538>
closer = 'serhiy.storchaka'
components = ['Tests']
creation = <Date 2021-09-13.07:10:10.869>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 45181
keywords = ['patch']
message_count = 2.0
messages = ['401687', '401697']
nosy_count = 3.0
nosy_names = ['ghaering', 'serhiy.storchaka', 'erlendaasland']
pr_nums = ['28304']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue45181'
versions = ['Python 3.11']

[serhiy-storchaka]

The proposed PR rewrites the loading of sqlite3 tests. Instead of explicitly enumerating test modules and test classes in every module, and manually creating test suites, it uses unittest discover ability. Every new test files and test classes will be automatically added to tests.

As a side effect, unittest filtering by pattern works now.

$ ./python -m test.test_sqlite -vk long
test_sqlite: testing with version '2.6.0', sqlite_version '3.31.1'
test_func_return_long_long (sqlite3.test.test_userfunctions.FunctionTests) ... ok
test_param_long_long (sqlite3.test.test_userfunctions.FunctionTests) ... ok

---

Ran 2 tests in 0.001s

OK

[serhiy-storchaka]

New changeset 3e19409 by Serhiy Storchaka in branch 'main':
bpo-45181: Simplify loading sqlite3 tests (GH-28304)
3e19409