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import pytest
from OpenSSL._util import exception_from_error_queue, lib
class TestErrors:
"""
Tests for handling of certain OpenSSL error cases.
"""
def test_exception_from_error_queue_nonexistent_reason(self) -> None:
"""
:func:`exception_from_error_queue` raises ``ValueError`` when it
encounters an OpenSSL error code which does not have a reason string.
"""
lib.ERR_put_error(lib.ERR_LIB_EVP, 0, 1112, b"", 10)
with pytest.raises(ValueError) as exc:
exception_from_error_queue(ValueError)
assert exc.value.args[0][0][2] in ("", "unknown error")
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