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 30674-be81ecfdd4) Lines: 340 345 98.6 %
Date: 2026-02-13 09:23:38 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 553
surface_gcd_path 1072
common_nbr_verify 1092
descend_volcano 2902
common_nbr_corner 37417
common_nbr_pred 43025
common_nbr_pred_poly 44117
node_degree 84318
surface_gcd_cycle 97065
ascend_volcano 133377
nhbr_polynomial 148549
next_surface_nbr 156010
surface_parallel_path 205502
j_level_in_volcano 216476
random_distinct_neighbours_of 216801
surface_path 226631
pcp_get_enum_cnt 231908
pcp_get_k 231908
pcp_get_o 231908
pcp_get_L 231909
pcp_get_n 231909
pcp_get_L0 231912
enum_roots 231913
common_nbr 242902
extend_path 292806
is_j_exceptional 379205
get_nbrs 26512395
Flx_remove_root 35788077

Generated by: LCOV version 1.16