105 lines
4.4 KiB
Erlang
105 lines
4.4 KiB
Erlang
% BCD (Binary-Coded Decimal) codec unit tests.
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% https://en.wikipedia.org/wiki/Binary-coded_decimal
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%
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% (C) 2020 by Vadim Yanitskiy <axilirator@gmail.com>
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%
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% All Rights Reserved
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%
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% This program is free software; you can redistribute it and/or modify
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% it under the terms of the GNU Affero General Public License as
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% published by the Free Software Foundation; either version 3 of the
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% License, or (at your option) any later version.
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%
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% This program is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU Affero General Public License
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% along with this program. If not, see <http://www.gnu.org/licenses/>.
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%
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% Additional Permission under GNU AGPL version 3 section 7:
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%
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% If you modify this Program, or any covered work, by linking or
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% combining it with runtime libraries of Erlang/OTP as released by
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% Ericsson on http://www.erlang.org (or a modified version of these
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% libraries), containing parts covered by the terms of the Erlang Public
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% License (http://www.erlang.org/EPLICENSE), the licensors of this
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% Program grant you additional permission to convey the resulting work
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% without the need to license the runtime libraries of Erlang/OTP under
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% the GNU Affero General Public License. Corresponding Source for a
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% non-source form of such a combination shall include the source code
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% for the parts of the runtime libraries of Erlang/OTP used as well as
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% that of the covered work.
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-module(bcd_codec_test).
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-include_lib("eunit/include/eunit.hrl").
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-define(TEST_IMSI_STR, "901701234567890").
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-define(TEST_IMSI_NUM, 901701234567890).
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-define(TEST_IMSI_ENC, << 16#09, 16#71, 16#10, 16#32, 16#54, 16#76, 16#98, 16#f0 >>).
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-define(TEST_IMSI_ENC_NOPAD, << 16#09, 16#71, 16#10, 16#32, 16#54, 16#76, 16#98, 16#0:4 >>).
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-define(TEST_USSD_STR, "*#100#").
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-define(TEST_USSD_ENC, << 16#ed, 16#01, 16#e0 >>).
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encode_test() ->
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?assertEqual(?TEST_IMSI_ENC, bcd_codec:encode(<< ?TEST_IMSI_STR >>)),
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?assertEqual(?TEST_IMSI_ENC, bcd_codec:encode(?TEST_IMSI_STR)),
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?assertEqual(?TEST_IMSI_ENC, bcd_codec:encode(?TEST_IMSI_NUM)),
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?assertEqual(?TEST_USSD_ENC, bcd_codec:encode(<< ?TEST_USSD_STR >>)),
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?assertEqual(?TEST_USSD_ENC, bcd_codec:encode(?TEST_USSD_STR)),
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?assertEqual(<< 16#ba, 16#fc >>, bcd_codec:encode(<< "abc" >>)),
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?assertEqual(<< >>, bcd_codec:encode(<< >>)),
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?assertEqual(<< >>, bcd_codec:encode("")),
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?assertError({bad_bcd_character, $M}, bcd_codec:encode(<< "Mahlzeit!" >>)),
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?assertError({bad_bcd_character, $f}, bcd_codec:encode("880043556f")),
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?assertError(_, bcd_codec:encode(nope)). % TODO: 'no matching function clause'
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encode_nopad_test() ->
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?assertEqual(?TEST_IMSI_ENC_NOPAD, bcd_codec:encode_nopad(<< ?TEST_IMSI_STR >>)),
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?assertEqual(?TEST_USSD_ENC, bcd_codec:encode_nopad(<< ?TEST_USSD_STR >>)),
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?assertEqual(<< 16#ba, 16#c:4 >>, bcd_codec:encode_nopad(<< "abc" >>)).
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decode_test() ->
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?assertEqual(?TEST_IMSI_STR, bcd_codec:decode(?TEST_IMSI_ENC)),
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?assertEqual(?TEST_USSD_STR, bcd_codec:decode(?TEST_USSD_ENC)),
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?assertEqual("abc", bcd_codec:decode(<< 16#ba, 16#fc >>)),
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?assertEqual("abc", bcd_codec:decode([16#ba, 16#fc])),
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?assertEqual("", bcd_codec:decode(<< >>)),
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%% TODO: expect 'no matching function clause' here
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?assertError(_, bcd_codec:decode_num(<< ?TEST_IMSI_ENC/binary, 16#ff:3 >>)),
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?assertError(_, bcd_codec:decode_num(<< 16#ff:1, ?TEST_USSD_ENC/binary >>)),
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?assertError(_, bcd_codec:encode_num(nope)).
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encode_num_test() ->
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?assertEqual(16#99, bcd_codec:encode_num(99)),
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?assertEqual(16#05, bcd_codec:encode_num(50)),
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?assertEqual(16#14, bcd_codec:encode_num(41)),
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?assertEqual(16#10, bcd_codec:encode_num(1)),
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?assertEqual(16#00, bcd_codec:encode_num(0)),
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%% TODO: expect 'no matching function clause' here
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?assertError(_, bcd_codec:encode_num(999)),
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?assertError(_, bcd_codec:encode_num(100)),
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?assertError(_, bcd_codec:encode_num(-1)).
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decode_num_test() ->
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?assertEqual(99, bcd_codec:decode_num(16#99)),
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?assertEqual(50, bcd_codec:decode_num(16#05)),
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?assertEqual(41, bcd_codec:decode_num(16#14)),
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?assertEqual(1, bcd_codec:decode_num(16#10)),
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?assertEqual(0, bcd_codec:decode_num(16#00)),
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%% TODO: expect 'no matching function clause' here
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?assertError(_, bcd_codec:decode_num(16#666)),
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?assertError(_, bcd_codec:decode_num(16#a0)),
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?assertError(_, bcd_codec:decode_num(16#0a)),
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?assertError(_, bcd_codec:decode_num(-1)).
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