test_user_pass: Add UTs for character filtering

test_user_pass: Add UTs for character filtering

For simplicity I implemented them only with the
inline method, but they actually apply to all methods.

Change-Id: Ie8d2d5f6f58679baaf5eb817a7e2ca1afcb8c4db
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20240129105358.11161-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/search?l=mid&q=20240129105358.11161-1-gert@greenie.muc.de
Signed-off-by: Gert Doering <gert@greenie.muc.de>