Andrew Kesterson
43f46dca64
Introduce a self-contained mutation testing harness that verifies the unit tests actually catch bugs: it makes small deliberate breakages to the library (flip comparisons, delete statements, swap true/false, etc.), rebuilds, and runs the whole CTest suite against each mutant. Tests that still pass reveal a gap; tests that fail "kill" the mutant. - scripts/mutation_test.py: the engine (stdlib only, no LLVM/clang deps). Operators ROR/LCR/BCR/AOR/ICR/SDL over src/error.c and the macro header. Mutates a scratch copy, never the working tree. Supports --target, --list, --max-mutants sampling, --threshold gating, --timeout. - CMakeLists.txt: 'mutation' custom target (cmake --build build --target mutation). - .gitea/workflows/ci.yaml: gated mutation job on src/error.c (threshold 65%). - tests/MUTATION.md: how to run, interpret survivors, and known equivalents. Close the real gaps the harness found in src/error.c (score 53% -> 71%): - err_error_names: the AKERR_* codes have their names registered by akerr_init - err_release_clears: releasing a context wipes it before reuse - err_pool_exhaust: akerr_next_error returns NULL when the pool is full and always hands back the lowest free slot Also surfaced (documented, not fixed): AKERR_MAX_ERR_VALUE (+15) is below AKERR_NOT_IMPLEMENTED (+16) and AKERR_BADEXC (+17), so those codes can never have a name registered. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
#include "akerror.h"
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#include "err_capture.h"
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#include <string.h>
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/*
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* akerr_init() registers a human-readable name for each library error code.
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* Verify the names are actually installed (mutation testing showed the
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* registration calls could be deleted without any test noticing).
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*
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* Note: AKERR_NOT_IMPLEMENTED and AKERR_BADEXC are intentionally omitted -- they
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* exceed AKERR_MAX_ERR_VALUE, so akerr_name_for_status cannot store or return
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* their names (see tests/MUTATION.md).
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*/
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static const struct {
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int code;
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const char *name;
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} expected[] = {
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{ AKERR_NULLPOINTER, "Null Pointer Error" },
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{ AKERR_OUTOFBOUNDS, "Out Of Bounds Error" },
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{ AKERR_API, "API Error" },
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{ AKERR_ATTRIBUTE, "Attribute Error" },
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{ AKERR_TYPE, "Type Error" },
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{ AKERR_KEY, "Key Error" },
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{ AKERR_INDEX, "Index Error" },
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{ AKERR_FORMAT, "Format Error" },
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{ AKERR_IO, "Input Output Error" },
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{ AKERR_VALUE, "Value Error" },
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{ AKERR_RELATIONSHIP, "Relationship Error" },
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{ AKERR_CIRCULAR_REFERENCE, "Circular Reference Error" },
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};
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int main(void)
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{
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akerr_init();
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for ( unsigned i = 0; i < sizeof(expected) / sizeof(expected[0]); i++ ) {
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char *nm = akerr_name_for_status(expected[i].code, NULL);
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AKERR_CHECK(nm != NULL);
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AKERR_CHECK(strcmp(nm, expected[i].name) == 0);
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}
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fprintf(stderr, "err_error_names ok\n");
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return 0;
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}
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