Erlang Programming/Debugging and Tracing
Tools
[edit | edit source]- Debugging
- dbg
- debugger
- Tracing
- ttb
- invision
- et
- Coverage
- Cover
Coverage
[edit | edit source]Coverage shows what functions are covered by a test. Sample program: test_rotate.erl
-module(test_rotate). -export([test/0]). test() -> assert( left_rotate([a,b,c]), [b,c,a] ). assert(X, X) -> true. left_rotate([]) -> []; left_rotate([H|T]) -> T ++ [H].
Sample output:
33> cover:compile(test_rotate). 34> test_rotate:test(). true 35> cover:analyse_to_file(test_rotate, "cover.html", [html]).
Contents of cover.html shows that each clause was run once except for left_rotate([]). Each time the program is tested, the run count for each visited clause is increased by one. Cover sample output file:
File generated from test_rotate.erl by COVER 2008-04-23 at 12:49:11 ********************************************* | -module(test_rotate). | -export([test/0]). | | test() -> 1..| assert( left_rotate([a,b,c]), [b,c,a] ). | 1..| assert(X, X) -> true. | 0..| left_rotate([]) -> []; 1..| left_rotate([H|T]) -> T ++ [H]. |