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) Coverage Total Hit
Test: PARI/GP v2.18.1 lcov report (development 31053-95e3b72995) Lines: 98.6 % 345 340
Test Date: 2026-07-24 17:03:07 Functions: 100.0 % 28 28
Legend: Lines:     hit not hit

Function Name Sort by function name Hit count Sort by function hit count
Flm_Fl_polmodular_evalxy 547
Flx_remove_root 39917095
ascend_volcano 135339
common_nbr 244025
common_nbr_corner 37340
common_nbr_pred 43031
common_nbr_pred_poly 44120
common_nbr_verify 1089
descend_volcano 2893
enum_roots 236573
extend_path 296836
get_nbrs 29088624
is_j_exceptional 384644
j_level_in_volcano 219578
next_surface_nbr 157240
nhbr_polynomial 150786
node_degree 85477
pcp_get_L 236573
pcp_get_L0 236573
pcp_get_enum_cnt 236573
pcp_get_k 236573
pcp_get_n 236573
pcp_get_o 236573
random_distinct_neighbours_of 219904
surface_gcd_cycle 98247
surface_gcd_path 1072
surface_parallel_path 206685
surface_path 231291

Generated by: LCOV version 2.0-1