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author | Vadim Yanitskiy <axilirator@gmail.com> | 2019-05-25 23:14:00 +0700 |
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committer | Vadim Yanitskiy <axilirator@gmail.com> | 2019-05-28 06:50:41 +0700 |
commit | aa0683d9f8290515fb9c6681727beeba39a72c1e (patch) | |
tree | 90990138a9b42e97d034662e91230028f12ca8e2 /src/bits.c | |
parent | 581a34da60abb4d1b5c32907961d7863a0ff3b8c (diff) |
gsm0408/gsm0408_test.c: introduce BCD number encoding / decoding test
So far, both gsm48_encode_bcd_number() and gsm48_decode_bcd_number2()
did not have any unit test coverage. Let's fill this gap by testing
the following scenarios:
- encoding / decoding of a regular 9-digit MSISDN;
- encoding / decoding of a MSISDN with optional LHV;
- encoding / decoding of a long 15-digit MSISDN;
- encoding / decoding of a MSISDN to a buffer:
- with exactly matching size,
- with lower size (truncation);
- decoding LV buffer with incorrect length,
- encoding / decoding an empty input buffer.
As it turns out, gsm48_decode_bcd_number2() does not properly
handle encoded LV if the output buffer size is equal to the
original MSISDN length + 1 (\0-terminator): one digit is lost.
For example, decoding of 15-digit long MSISDN to a buffer of size
16 (15 digits + 1 for \0) would give us only 14 digits. This is
reflected in the unit test output:
Decoding HEX (buffer limit=16) '0821436587092143f5'...
Expected: (rc=0) '123456789012345'
Actual: (rc=0) '12345678901234'
Moreover, if the output buffer is shorter than decoded number,
gsm48_decode_bcd_number2() silently truncates it and returns 0,
while its description states, that the rc should reflect this.
To be fixed in the follow-up patches.
Change-Id: I4b2c330cf8ffe4427c0bee7d5f3b74be56ecd85d
Related: OS#4025
Diffstat (limited to 'src/bits.c')
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