LudovicRousseau / pyscard

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test_readergroups: allow --iterations=10

The readergroup is global so each test must restore the previous state
(empty reader group).

The error was:
$ pytest --iterations=10 test/test_readergroups.py
============================= test session starts ==============================
platform darwin -- Python 3.12.8, pytest-8.3.3, pluggy-1.5.0
rootdir: /Users/rousseau/Documents/sc/pyscard/pyscard
configfile: pyproject.toml
plugins: run-parallel-0.3.0
collected 7 items

test/test_readergroups.py .Fxx..F                                        [100%]

=================================== FAILURES ===================================
_______________________ test_reader_groups_method_calls ________________________

    def test_reader_groups_method_calls():
        reader_group = smartcard.reader.ReaderGroups.readergroups()
>       assert len(reader_group.instance) == 0, "No reader groups should be pre-defined"
E       AssertionError: No reader groups should be pre-defined
E       assert 1 == 0
E        +  where 1 = len(['a'])
E        +    where ['a'] = <smartcard.reader.ReaderGroups.readergroups object at 0x10ecbb110>.instance

test/test_readergroups.py:17: AssertionError
____________________ test_demonstrate_getting_is_impossible ____________________

    def test_demonstrate_getting_is_impossible():
        """Demonstrate that `.getreadergroups()` returns hard-coded values."""

        reader_group = smartcard.reader.ReaderGroups.readergroups()
        list.append(reader_group.instance, "a")
>       assert reader_group.instance == ["a"]
E       AssertionError: assert ['a', 'a'] == ['a']
E
E         Left contains one more item: 'a'
E         Use -v to get more diff

test/test_readergroups.py:88: AssertionError
=========================== short test summary info ============================
FAILED test/test_readergroups.py::test_reader_groups_method_calls - AssertionError: No reader groups should be pre-defined
FAILED test/test_readergroups.py::test_demonstr... (continued)

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