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 30735-65f72320ad) Lines: 340 345 98.6 %
Date: 2026-03-15 09:23:45 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 556
Flx_remove_root 35795440
ascend_volcano 133397
common_nbr 242601
common_nbr_corner 37319
common_nbr_pred 43023
common_nbr_pred_poly 44120
common_nbr_verify 1098
descend_volcano 2897
enum_roots 231884
extend_path 292643
get_nbrs 26492625
is_j_exceptional 379026
j_level_in_volcano 216420
next_surface_nbr 155900
nhbr_polynomial 148551
node_degree 84253
pcp_get_L 231883
pcp_get_L0 231884
pcp_get_enum_cnt 231882
pcp_get_k 231882
pcp_get_n 231884
pcp_get_o 231882
random_distinct_neighbours_of 216742
surface_gcd_cycle 96858
surface_gcd_path 1072
surface_parallel_path 205293
surface_path 226603

Generated by: LCOV version 1.16