Code coverage tests

This page documents the degree to which the PARI/GP source code is tested by our public test suite, distributed with the source distribution in directory src/test/. This is measured by the gcov utility; we then process gcov output using the lcov frond-end.

We test a few variants depending on Configure flags on the pari.math.u-bordeaux.fr machine (x86_64 architecture), and agregate them in the final report:

The target is to exceed 90% coverage for all mathematical modules (given that branches depending on DEBUGLEVEL or DEBUGMEM are not covered). This script is run to produce the results below.

LCOV - code coverage report
Current view: top level - basemath - volcano.c (source / functions) Hit Total Coverage
Test: PARI/GP v2.18.1 lcov report (development 30773-2078653b96) Lines: 340 345 98.6 %
Date: 2026-04-04 09:27:12 Functions: 28 28 100.0 %
Legend: Lines: hit not hit

Function Name Sort by function name Hit count Sort by hit count
Flm_Fl_polmodular_evalxy 554
surface_gcd_path 1072
common_nbr_verify 1093
descend_volcano 2903
common_nbr_corner 37365
common_nbr_pred 43025
common_nbr_pred_poly 44118
node_degree 84251
surface_gcd_cycle 96973
ascend_volcano 133380
nhbr_polynomial 148519
next_surface_nbr 155941
surface_parallel_path 205394
j_level_in_volcano 216471
random_distinct_neighbours_of 216786
surface_path 226620
pcp_get_enum_cnt 231902
pcp_get_k 231903
pcp_get_o 231903
enum_roots 231905
pcp_get_L 231906
pcp_get_L0 231906
pcp_get_n 231907
common_nbr 242746
extend_path 292788
is_j_exceptional 379041
get_nbrs 26474972
Flx_remove_root 35742429

Generated by: LCOV version 1.16