ilpanich / axiam-c-sdk / 30049005468

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test(coverage): C SDK branch coverage 70.9%→82.0% + real TLS/mTLS handshake test (#7)

* test(coverage): raise C SDK branch coverage to 82% + prove real TLS/mTLS handshake

C2: add branch-depth tests (test_client_branches, test_client_null_args,
test_guard_branches, test_jwks_branches, test_util_branches, test_json_build,
and extensions to test_config/test_sensitive) covering JSON-parse-failure arms,
cookie/claim edge cases, base64url decode failures, and NULL-argument guards.
Branch coverage 70.9% -> 82.0%; lines 98.8% -> 99.0%; functions 100%.

C3: add test_tls_server — a loopback OpenSSL SSL_accept fixture that drives a
real HTTPS round-trip through the default libcurl transport, including an mTLS
path that verifies the client certificate is presented (CURLOPT_CAINFO_BLOB /
SSLCERT_BLOB / SSLKEY_BLOB now exercised against a completed handshake, not just
a closed port). gen_pki.sh gains a loopback-SAN server cert; keys are generated
at build time, none committed. Deterministic (ctest --repeat until-fail:20).

C1: restrict the coverage workflow's push trigger to main (keep pull_request)
so WIP-branch pushes no longer publish builds to Coveralls; add a
--fail-under-branch 80 gate alongside the existing --fail-under-line 96.

Additive tests + CI config only; no changes to src/ or public headers.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PV2KneaEYUU55B6toL1Yxf

* fix(test): include internal.h in test_tls_server for axiam_client_raw_get decl

clang treats the implicit function declaration as an error (gcc-13 only warns),
failing the clang CI matrix. axiam_client_raw_get is declared in the internal
(non-installed) header src/internal.h, which sibling transport tests already
include; add the same include here.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PV2KneaEYUU55B6toL1Yxf

---------

Co-authored-by: Claude <noreply@anthropic.com>

652 of 796 branches covered (81.91%)

Branch coverage included in aggregate %.

1037 of 1047 relevant lines covered (99.04%)

92.72 hits per line