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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(couch_expiring_cache_tests).
-include_lib("couch/include/couch_eunit.hrl").
-include_lib("couch_expiring_cache/include/couch_expiring_cache.hrl").
-define(CACHE_NAME, <<"test">>).
start_link() ->
Opts = #{
cache_name => ?CACHE_NAME,
period => 20,
max_jitter => 0
},
couch_expiring_cache_server:start_link(?MODULE, Opts).
couch_expiring_cache_basic_test_() ->
{
"Test expiring cache basics",
{
setup,
fun setup_couch/0, fun teardown_couch/1,
{
foreach,
fun setup/0, fun teardown/1,
[
fun simple_lifecycle/1
]
}
}
}.
setup_couch() ->
test_util:start_couch([fabric, couch_jobs]).
teardown_couch(Ctx) ->
test_util:stop_couch(Ctx).
setup() ->
{ok, Pid} = start_link(),
true = unlink(Pid),
#{pid => Pid}.
teardown(#{pid := Pid}) ->
exit(Pid, kill).
simple_lifecycle(_) ->
{timeout, 10, ?_test(begin
Now = erlang:system_time(?TIME_UNIT),
StaleTS = Now + 100,
ExpiresTS = Now + 200,
Name = ?CACHE_NAME,
Key = <<"key">>,
Val = <<"val">>,
?assertEqual(ok, couch_expiring_cache_fdb:clear_all(Name)),
?assertEqual(not_found, couch_expiring_cache:lookup(Name, Key)),
?assertEqual([], entries(Name)),
?assertEqual(ok,
couch_expiring_cache:insert(Name, Key, Val, StaleTS, ExpiresTS)),
?assertEqual({fresh, Val}, couch_expiring_cache:lookup(Name, Key)),
ok = wait_lookup(Name, Key, {stale, Val}),
% Refresh the existing key with updated timestamps
?assertEqual(ok,
couch_expiring_cache:insert(Name, Key, Val,
StaleTS + 100, ExpiresTS + 100)),
?assertEqual({fresh, Val}, couch_expiring_cache:lookup(Name, Key)),
?assertEqual(1, length(entries(Name))),
ok = wait_lookup(Name, Key, {stale, Val}),
ok = wait_lookup(Name, Key, expired),
ok = wait_lookup(Name, Key, not_found),
?assertEqual([], entries(Name)),
?assertEqual(not_found, couch_expiring_cache:lookup(Name, Key))
end)}.
entries(Name) ->
FarFuture = erlang:system_time(?TIME_UNIT) * 2,
couch_expiring_cache_fdb:get_range_to(Name, FarFuture, _Limit=100).
wait_lookup(Name, Key, Expect) ->
test_util:wait(fun() ->
case couch_expiring_cache:lookup(Name, Key) of
Expect -> ok;
_ -> wait
end
end, _Timeout = 1000, _PollingInterval = 10).
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