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% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
-module(mem3_cluster_test).
-behavior(mem3_cluster).
-include_lib("eunit/include/eunit.hrl").
-export([
cluster_unstable/1,
cluster_stable/1
]).
% Mem3 cluster callbacks
cluster_unstable(Server) ->
Server ! cluster_unstable,
Server.
cluster_stable(Server) ->
Server ! cluster_stable,
Server.
mem3_cluster_test_test_() ->
{
foreach,
fun setup/0,
fun teardown/1,
[
t_cluster_stable_during_startup_period(),
t_cluster_unstable_delivered_on_nodeup(),
t_cluster_unstable_delivered_on_nodedown(),
t_wait_period_is_reset_after_last_change()
]
}.
t_cluster_stable_during_startup_period() ->
?_test(begin
{ok, Pid} = mem3_cluster:start_link(?MODULE, self(), 1, 2),
register(?MODULE, Pid),
receive
cluster_stable ->
?assert(true)
after 1500 ->
throw(timeout)
end,
unlink(Pid),
exit(Pid, kill)
end).
t_cluster_unstable_delivered_on_nodeup() ->
?_test(begin
{ok, Pid} = mem3_cluster:start_link(?MODULE, self(), 1, 2),
register(?MODULE, Pid),
Pid ! {nodeup, node()},
receive
cluster_unstable ->
?assert(true)
after 1000 ->
throw(timeout)
end,
unlink(Pid),
exit(Pid, kill)
end).
t_cluster_unstable_delivered_on_nodedown() ->
?_test(begin
{ok, Pid} = mem3_cluster:start_link(?MODULE, self(), 1, 2),
register(?MODULE, Pid),
Pid ! {nodedown, node()},
receive
cluster_unstable ->
?assert(true)
after 1000 ->
throw(timeout)
end,
unlink(Pid),
exit(Pid, kill)
end).
t_wait_period_is_reset_after_last_change() ->
?_test(begin
{ok, Pid} = mem3_cluster:start_link(?MODULE, self(), 1, 1),
register(?MODULE, Pid),
timer:sleep(800),
Pid ! {nodeup, node()}, % after 800 sec send a nodeup
receive
cluster_stable ->
?assert(false)
after 400 ->
?assert(true) % stability check should have been reset
end,
timer:sleep(1000),
receive
cluster_stable ->
?assert(true)
after 0 ->
?assert(false) % cluster_stable arrives after enough quiet time
end,
unlink(Pid),
exit(Pid, kill)
end).
% Test helper functions
setup() ->
ok.
teardown(_) ->
case whereis(?MODULE) of
undefined ->
ok;
Pid when is_pid(Pid) ->
unlink(Pid),
exit(Pid, kill)
end.
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