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-module(sample_callback_wrong).
%% This attribute uses the american spelling of 'behaviour'.
-behavior(sample_behaviour).
-export([
% sample_callback_1/0,
sample_callback_2/0,
sample_callback_3/0,
sample_callback_4/1,
sample_callback_5/1,
sample_callback_6/3
]).
% sample_callback_1() -> 41. % We can't really break this contract so: missing!
sample_callback_2() -> 42. % This is not an atom().
sample_callback_3() -> fair. % This is probably a typo.
sample_callback_4(_) -> % We cannot break the input.
fail. % We can definitely return a wrong value however. :)
sample_callback_5(Input) -> % Input is treated as an atom, result is a list.
atom_to_list(Input). % Both violate the contract.
sample_callback_6(OldNr, NewNr, Reason) ->
Diff = NewNr - OldNr, % This is valid handling of the input
%% Reason should have been treated as a string.
Msg = string:join(["Reason: ", atom_to_list(Reason)], ","),
{okk, NewNr}. %% This, too, is a typo.
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