Add compile-time and runtime checks for feature availability

[pulsastrix]

This PR adds startup and compile-time checks to libcoap-rs and libcoap-sys that ensure that features enabled by Cargo.toml are actually available.

This is now possible thanks to the changes made in obgm/libcoap#1488, which adds the required defines for compile-time and functions for startup checks.

Closes #20

[github-actions]

Workflow Status Report

Generated for commit 9cf7cd3 on Thu Aug 22 14:04:26 UTC 2024.

Linting Report

Clippy check result: success

Refer to the "Files Changed" tab for identified issues.

Code Coverage Report

Filename                                    Stmts    Miss  Cover    Missing
----------------------------------------  -------  ------  -------  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
libcoap/tests/dtls_client_server_test.rs       10       0  100.00%
libcoap/src/context.rs                        217     114  47.47%   51, 105, 110-115, 121-122, 127, 132, 134, 136, 138, 140, 142-148, 184-227, 236-244, 261, 297, 380, 385, 401, 409-542, 567-574, 589-599, 612-619, 630-657
libcoap/src/crypto.rs                          31       2  93.55%   109, 183
libcoap/src/error.rs                            4       4  0.00%    87-166
libcoap/src/event.rs                            9       0  100.00%
libcoap/src/mem.rs                            118      49  58.47%   144-158, 192-193, 206-207, 267-293, 315-319, 349-350, 363-365, 377-388, 448-484, 503, 521-523, 526-527
libcoap/src/prng.rs                            18      14  22.22%   67-179
libcoap/src/protocol.rs                       150     110  26.67%   145-146, 152-157, 159-174, 176-177, 184-189, 191-206, 208-209, 266-267, 289, 303-304, 347-352, 361-380, 437-482, 515, 517
libcoap/src/resource.rs                       139      69  50.36%   96-98, 173-208, 216-221, 248, 251, 254, 257, 268-289, 302-304, 329-333, 340-341, 350-352, 358-360, 366-374, 496, 498-509
libcoap/src/transport.rs                       10       3  70.00%   28-33, 54
libcoap/src/types.rs                          237     152  35.86%   77-122, 129-158, 201-276, 286, 350, 424-464, 517-566, 574, 591, 623, 649-699, 753, 768, 798-818, 840-841, 874-958
libcoap/src/message/mod.rs                    245     124  49.39%   107-110, 112-133, 141-147, 149-170, 174, 176, 210, 212, 215-224, 227-245, 247-251, 267-276, 297-303, 400, 443, 449, 480, 488, 490-492, 499-500, 508, 513-526, 531, 551-552, 563-564
libcoap/src/message/request.rs                220     150  31.82%   52, 69-202, 229-257, 265-375, 381, 384-386, 390, 397-401, 412, 416, 431-432, 437, 440-441, 445-446, 450, 453, 456, 459, 462, 473-477
libcoap/src/message/response.rs               143     111  22.38%   33-156, 162, 165, 168, 171, 174, 192-322, 326-330, 356-357
libcoap/tests/common/mod.rs                    43       5  88.37%   66, 91, 93-94, 97
libcoap-sys/src/lib.rs                         91      32  64.84%   115-151, 183, 188, 193, 198, 228, 233, 238, 243, 248, 253, 258, 263, 268, 278, 320-337, 459-460
libcoap/src/session/client.rs                 135      62  54.07%   69-74, 76-84, 88-94, 96, 100, 111, 114, 119, 140, 146, 152-153, 155, 174, 180, 186-187, 189, 211, 213, 215, 217-223, 265-266, 272-282, 293-303, 314-324, 371-376
libcoap/src/session/mod.rs                    154      86  44.16%   61-67, 96-97, 111-225, 236-252, 268-270, 289-291, 301-311, 347, 362, 377-396, 419, 427, 451, 455, 476-480, 558, 564
libcoap/src/session/server.rs                  48      12  75.00%   71-73, 140-141, 149-150, 181-186
TOTAL                                        2022    1099  45.65%

Diff against main

Filename                         Stmts    Miss  Cover
-----------------------------  -------  ------  -------
libcoap/src/context.rs              +1      +2  -0.68%
libcoap/src/mem.rs                   0      +1  -0.85%
libcoap/src/prng.rs                 +2      +2  -2.78%
libcoap/src/resource.rs             +2      +1  -0.01%
libcoap/src/types.rs                +1       0  +0.27%
libcoap/src/message/mod.rs          +1       0  +0.21%
libcoap-sys/src/lib.rs             +30     +14  -5.66%
libcoap/src/session/client.rs       +9      +9  -3.86%
libcoap/src/session/server.rs       +5       0  +2.91%
TOTAL                              +51     +29  -0.06%

Results for commit: 4eb5188

Coverage target is 80%

[JKRhb]

See a couple of comments below, otherwise looks pretty good to me :)

[JKRhb]

LGTM! :)