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EQC Cluster example
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-module(client_eqc). | |
-compile(export_all). | |
-include_lib("eqc/include/eqc.hrl"). | |
-include_lib("eqc/include/eqc_component.hrl"). | |
api_spec() -> | |
#api_spec { | |
language = erlang, | |
modules = [ | |
#api_module { | |
name = xmaps, | |
functions = [ | |
#api_fun { name = new, arity = 0, classify = xmaps_eqc}, | |
#api_fun { name = get, arity = 2, classify = xmaps_eqc}, | |
#api_fun { name = put, arity = 3, classify = xmaps_eqc} | |
]} ]}. | |
-record(state, { | |
init = false | |
}). | |
initial_state() -> #state{}. | |
new() -> {x, xmaps:new()}. | |
new_pre(S) -> not initialized(S). | |
new_args(_S) -> []. | |
new_callouts(_S, []) -> | |
?CALLOUT(xmaps, new, [], 'MAP'), | |
?RET({x, 'MAP'}). | |
new_next(S, _, _) -> S#state { init = true }. | |
%% Use a common postcondition for all commands, so we can utilize the valid return | |
%% of each command. | |
postcondition_common(S, Call, Res) -> | |
eq(Res, return_value(S, Call)). | |
%% Main property, just verify that the commands are in sync with reality. | |
prop_component_correct() -> | |
?SETUP(fun() -> | |
eqc_mocking:start_mocking(api_spec()), | |
fun() -> ok end | |
end, | |
?FORALL(Cmds, commands(?MODULE), | |
begin | |
{H,S,R} = run_commands(?MODULE, Cmds), | |
pretty_commands(?MODULE, Cmds, {H,S,R}, | |
aggregate(with_title('Commands'), command_names(Cmds), | |
aggregate(with_title('Features'), eqc_statem:call_features(H), | |
features(eqc_statem:call_features(H), | |
R == ok)))) | |
end)). | |
%% Helper for showing states of the output: | |
t() -> t(5). | |
t(Secs) -> | |
eqc:quickcheck(eqc:testing_time(Secs, eqc_statem:show_states(prop_component_correct()))). | |
initialized(#state { init = I }) -> I. |
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-module(cluster). | |
-include_lib("eqc/include/eqc.hrl"). | |
-include_lib("eqc/include/eqc_cluster.hrl"). | |
-compile(export_all). | |
components() -> [ | |
xmaps_eqc, client_eqc | |
]. | |
api_spec() -> api_spec(?MODULE). | |
prop_cluster_correct() -> | |
?SETUP(fun() -> | |
eqc_mocking:start_mocking(api_spec()), | |
fun() -> ok end | |
end, | |
?FORALL(Cmds, eqc_cluster:commands(?MODULE), | |
begin | |
{H,S,R} = run_commands(?MODULE, Cmds), | |
pretty_commands(?MODULE, Cmds, {H,S,R}, | |
aggregate(command_names(Cmds), | |
R == ok)) | |
end)). | |
t() -> t(15). | |
t(Secs) -> | |
eqc:quickcheck(eqc:testing_time(Secs, eqc_statem:show_states(prop_cluster_correct()))). | |
cmds() -> | |
eqc_gen:sample(eqc_cluster:commands(?MODULE)). |
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-module(xmaps_eqc). | |
-compile(export_all). | |
-include_lib("eqc/include/eqc.hrl"). | |
-include_lib("eqc/include/eqc_component.hrl"). | |
api_spec() -> | |
#api_spec { | |
language = erlang, | |
modules = []}. | |
-record(state, { | |
initialized = false, | |
m :: maps:map(integer(), integer()), | |
contents = [] :: list({integer(), integer()}) | |
}). | |
initial_state() -> #state{}. | |
ensure_started_pre(S) -> initialized(S). | |
new() ->maps:new(). | |
new_pre(S) -> not initialized(S). | |
new_args(_S) -> []. | |
new_return(#state { contents = Contents }, _R) -> | |
maps:from_list(Contents). | |
new_next(S, Res, _) -> S#state { m = Res, initialized = true }. | |
new_callers() -> [client_eqc]. | |
put(K, V, Map) -> maps:put(K, V, Map). | |
put_pre(S) -> initialized(S). | |
put_args(#state { m = Map }) -> [int(), int(), Map]. | |
put_next(#state { contents = Contents } = S, Res, [K, V, _]) -> | |
S#state { contents = lists:keystore(K,1,Contents, {K, V}), m = Res }. | |
put_return(#state { contents = Contents }, [K, V, _M]) -> | |
maps:from_list(lists:keystore(K, 1, Contents, {K, V})). | |
get(K, M) -> maps:get(K, M). | |
get_pre(S) -> initialized(S) andalso has_pairs(S). | |
get_args(#state { m = Map } = S) -> [elements(keys(S)), Map]. | |
get_return(#state { contents = Cs }, [K, _]) -> | |
{_, V} = lists:keyfind(K, 1, Cs), | |
V. | |
%% Property | |
%% ---------------------------------- | |
%% Use a common postcondition for all commands, so we can utilize the valid return | |
%% of each command. | |
postcondition_common(S, Call, Res) -> | |
eq(Res, return_value(S, Call)). | |
%% Main property, just verify that the commands are in sync with reality. | |
prop_component_correct() -> | |
?SETUP(fun() -> | |
eqc_mocking:start_mocking(api_spec()), | |
fun() -> ok end | |
end, | |
?FORALL(Cmds, commands(?MODULE), | |
begin | |
{H,S,R} = run_commands(?MODULE, Cmds), | |
pretty_commands(?MODULE, Cmds, {H,S,R}, | |
aggregate(with_title('Commands'), command_names(Cmds), | |
aggregate(with_title('Features'), eqc_statem:call_features(H), | |
features(eqc_statem:call_features(H), | |
R == ok)))) | |
end)). | |
%% Helper for showing states of the output: | |
t() -> t(5). | |
t(Secs) -> | |
eqc:quickcheck(eqc:testing_time(Secs, eqc_statem:show_states(prop_component_correct()))). | |
%% ---------------------------------- | |
initialized(#state { initialized = I }) -> I. | |
has_pairs(#state { contents = Contents }) -> Contents /= []. | |
keys(#state { contents = Cs }) -> [K || {K, _} <- Cs]. |
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