[issue2551242] Get_IndexerTest.test_native_autoselect fails on import mock

New submission from Ralf Schlatterbeck:

Where is the 'mock' module supposed to come from?
Not found with Debian oldstable (Python3.7) and Debian stable (Python3.9)

=================================== FAILURES ===================================
____________________ Get_IndexerTest.test_native_autoselect ____________________

self = <test.test_indexer.Get_IndexerTest testMethod=test_native_autoselect>

    def test_native_autoselect(self):
>       import mock, sys
E       ModuleNotFoundError: No module named 'mock'

test/test_indexer.py:290: ModuleNotFoundError
=========================== short test summary info ============================
FAILED test/test_indexer.py::Get_IndexerTest::test_native_autoselect - Module...

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components: Test
messages: 7665
nosy: rouilj, schlatterbeck
severity: normal
status: new
title: Get_IndexerTest.test_native_autoselect fails on import mock
versions: devel

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