/src/mochiweb_cover.erl
Erlang | 93 lines | 56 code | 12 blank | 25 comment | 2 complexity | b644d567d0890c60f4ad4d8c4a2cc53a MD5 | raw file
Possible License(s): MIT
- %% @author Bob Ippolito <bob@mochimedia.com>
- %% @copyright 2010 Mochi Media, Inc.
- %%
- %% Permission is hereby granted, free of charge, to any person obtaining a
- %% copy of this software and associated documentation files (the "Software"),
- %% to deal in the Software without restriction, including without limitation
- %% the rights to use, copy, modify, merge, publish, distribute, sublicense,
- %% and/or sell copies of the Software, and to permit persons to whom the
- %% Software is furnished to do so, subject to the following conditions:
- %%
- %% The above copyright notice and this permission notice shall be included in
- %% all copies or substantial portions of the Software.
- %%
- %% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- %% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- %% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- %% THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- %% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- %% FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- %% DEALINGS IN THE SOFTWARE.
- %% @doc Workarounds for various cover deficiencies.
- -module(mochiweb_cover).
- -export([get_beam/1, get_abstract_code/1,
- get_clauses/2, clause_lookup_table/1]).
- -export([clause_lookup_table/2]).
- %% Internal
- get_beam(Module) ->
- {Module, Beam, _Path} = code:get_object_code(Module),
- Beam.
- get_abstract_code(Beam) ->
- {ok, {_Module,
- [{abstract_code,
- {raw_abstract_v1, L}}]}} = beam_lib:chunks(Beam, [abstract_code]),
- L.
- get_clauses(Function, Code) ->
- [L] = [Clauses || {function, _, FName, _, Clauses}
- <- Code, FName =:= Function],
- L.
- clause_lookup_table(Module, Function) ->
- clause_lookup_table(
- get_clauses(Function,
- get_abstract_code(get_beam(Module)))).
- clause_lookup_table(Clauses) ->
- lists:foldr(fun clause_fold/2, [], Clauses).
- clause_fold({clause, _,
- [InTerm],
- _Guards=[],
- [OutTerm]},
- Acc) ->
- try [{erl_parse:normalise(InTerm), erl_parse:normalise(OutTerm)} | Acc]
- catch error:_ -> Acc
- end;
- clause_fold(_, Acc) ->
- Acc.
- %%
- %% Tests
- %%
- -ifdef(TEST).
- -include_lib("eunit/include/eunit.hrl").
- foo_table(a) -> b;
- foo_table("a") -> <<"b">>;
- foo_table(123) -> {4, 3, 2};
- foo_table([list]) -> [];
- foo_table([list1, list2]) -> [list1, list2, list3];
- foo_table(ignored) -> some, code, ignored;
- foo_table(Var) -> Var.
- foo_table_test() ->
- T = clause_lookup_table(?MODULE, foo_table),
- [?assertEqual(V, foo_table(K)) || {K, V} <- T].
- clause_lookup_table_test() ->
- ?assertEqual(b, foo_table(a)),
- ?assertEqual(ignored, foo_table(ignored)),
- ?assertEqual('Var', foo_table('Var')),
- ?assertEqual(
- [{a, b},
- {"a", <<"b">>},
- {123, {4, 3, 2}},
- {[list], []},
- {[list1, list2], [list1, list2, list3]}],
- clause_lookup_table(?MODULE, foo_table)).
- -endif.