ops_tests.erl

-module(ops_tests).
-include_lib("eunit/include/eunit.hrl").

add_test() ->
    4 = ops:add(2,2).

new_add_test() ->
    ?assertEqual(4, ops:add(2,2)),
    ?assertEqual(3, ops:add(1,2)),
    ?assert(is_number(ops:add(1,2))),
    ?assertEqual(3, ops:add(1,1)),
    ?assertError(badarith, 1/0).

add_test_() ->
    [test_them_types(),
     test_them_values(),
     ?_assertError(badarith, 1/0)].

test_them_types() ->
    ?_assert(is_number(ops:add(1,2))).

test_them_values() ->
    [?_assertEqual(4, ops:add(2,2)),
     ?_assertEqual(3, ops:add(1,2)),
     ?_assertEqual(3, ops:add(1,1))].