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reunion_test.erl
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reunion_test.erl
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-module(reunion_test).
-include_lib("eunit/include/eunit.hrl").
-compile([export_all]).
-record(reunion_test_set, {key, value}).
-record(reunion_test_bag, {key, value, modified}).
reunion_test_() ->
{setup, spawn,
fun() -> start() end,
fun(_) -> stop() end,
[
fun merge_only/0,
fun last_version_set/0,
fun last_modified_set/0,
fun last_version_bag/0,
fun last_modified_bag/0,
fun distributed_set/0
]
}.
start() ->
application:ensure_all_started(mnesia),
application:ensure_all_started(reunion),
{atomic, ok} = mnesia:create_table(reunion_test_set, [{attributes, [key, value]},
{ram_copies, [node()|nodes()]}]),
{atomic, ok} = mnesia:create_table(reunion_test_bag, [{type, bag},
{attributes, [key, value, modified]}, {ram_copies, [node()|nodes()]}]),
ok = mnesia:wait_for_tables([reunion_test_set, reunion_test_bag], 1000).
stop() ->
{atomic, ok} = mnesia:delete_table(reunion_test_set),
{atomic, ok} = mnesia:delete_table(reunion_test_bag).
merge_only() ->
Ms1 = reunion_lib:merge_only(init, {set, set,
mnesia:table_info(reunion_test_set, attributes), []}, node),
{ok, set} = Ms1,
Ms2 = reunion_lib:merge_only([{set, a, b}], [{set, b, a}], set),
{inconsistency, {merge, {set, a, b}, {set, b, a}}, set} = Ms2,
ok = reunion_lib:merge_only(done, set, node),
{ok, bag} = reunion_lib:merge_only(init, {reunion_test_bag, bag,
mnesia:table_info(reunion_test_set, attributes), []}, node),
{ok, Actions, bag} = reunion_lib:merge_only([{a, a}, {a, b}], [{b, b}, {a, b}],
bag),
{value, {ActA, {a, a}}, RestA} = lists:keytake({a, a}, 2, Actions),
write_remote = ActA,
{value, {ActB, {b, b}}, RestB} = lists:keytake({b, b}, 2, RestA),
write_local = ActB,
[] = RestB,
ok.
last_version_set() ->
{ok, {set, 3}} = reunion_lib:last_version(init, {table, set, [key, ver], [ver]},
node),
{ok, {write_local, {tab, a, 2}}, {set, 3}} =
reunion_lib:last_version([{tab, a, 1}], [{tab, a, 2}], {set, 3}),
{ok, {write_remote, {tab, a, 2}}, {set, 3}} =
reunion_lib:last_version([{tab, a, 2}], [{tab, a, 1}], {set, 3}),
ok = reunion_lib:last_version(done, {set, 3}, node).
last_modified_set() ->
{ok, {set, 3}} = reunion_lib:last_modified(init, {table, set,
[key, modified], []}, node),
{ok, {write_local, {tab, a, 2}}, {set, 3}} =
reunion_lib:last_modified([{tab, a, 1}], [{tab, a, 2}], {set, 3}),
{ok, {write_remote, {tab, a, 2}}, {set, 3}} =
reunion_lib:last_modified([{tab, a, 2}], [{tab, a, 1}], {set, 3}),
ok = reunion_lib:last_modified(done, {set, 3}, node).
last_version_bag() ->
{ok, {bag, 4, 3}} = reunion_lib:last_version(init, {tab, bag, [key, skey, version],
[version, skey]}, node),
{ok, Actions, {bag, 4, 3}} = reunion_lib:last_version(
[{tab, key, askey, 0}, {tab, key, bskey, 2}, {tab, key, cskey, 0}],
[{tab, key, askey, 1}, {tab, key, bskey, 1}, {tab, key, cskey, 0}],
{bag, 4, 3}),
% in this simulation we should get following results:
% - askey, 0, should be removed locally and replaced with askey, 1
% - bskey, 1, should be removed remotely and replaced with bskey, 2
%_ - there should be no changes against cskey
{value, {Aal, {tab, key, askey, 0}}, NextAa} = lists:keytake(
{tab, key, askey, 0}, 2, Actions),
delete_local = Aal,
{value, {Aal1, {tab, key, askey, 1}}, NextAa1} = lists:keytake(
{tab, key, askey, 1}, 2, NextAa),
write_local = Aal1,
{value, {Bar, {tab, key, bskey, 1}}, NextAb} = lists:keytake(
{tab, key, bskey, 1}, 2, NextAa1),
delete_remote = Bar,
{value, {BBr, {tab, key, bskey, 2}}, NextAb1} = lists:keytake(
{tab, key, bskey, 2}, 2, NextAb),
write_remote = BBr,
[] = NextAb1.
last_modified_bag() ->
{ok, {bag, 4, 3}} = reunion_lib:last_modified(init, {tab, bag,
[key, skey, modified], [skey]}, node),
{ok, Actions, {bag, 4, 3}} = reunion_lib:last_modified(
[{tab, key, askey, 0}, {tab, key, bskey, 2}, {tab, key, cskey, 0}],
[{tab, key, askey, 1}, {tab, key, bskey, 1}, {tab, key, cskey, 0}],
{bag, 4, 3}),
% in this simulation we should get following results:
% - askey, 0, should be removed locally and replaced with askey, 1
% - bskey, 1, should be removed remotely and replaced with bskey, 2
%_ - there should be no changes against cskey
{value, {Aal, {tab, key, askey, 0}}, NextAa} = lists:keytake(
{tab, key, askey, 0}, 2, Actions),
delete_local = Aal,
{value, {Aal1, {tab, key, askey, 1}}, NextAa1} = lists:keytake(
{tab, key, askey, 1}, 2, NextAa),
write_local = Aal1,
{value, {Bar, {tab, key, bskey, 1}}, NextAb} = lists:keytake(
{tab, key, bskey, 1}, 2, NextAa1),
delete_remote = Bar,
{value, {BBr, {tab, key, bskey, 2}}, NextAb1} = lists:keytake(
{tab, key, bskey, 2}, 2, NextAb),
write_remote = BBr,
[] = NextAb1.
distributed_set() ->
case nodes() -- [node()] of
[] ->
timer:sleep(1000), % to make sure that tables activated
ok;
Nodes ->
distributed_set(hd(Nodes))
end.
distrib(Me, MyNode) ->
mnesia:subscribe(system),
Me ! running,
receive
{mnesia_system_event, {mnesia_down, _}} ->
mnesia:dirty_write(#reunion_test_set{key=rkey1, value=rvalue1}),
mnesia:dirty_delete({reunion_test_set, key5}),
timer:sleep(1000),
error_logger:info_msg("remote modifications done"),
{reunion, MyNode} ! {remote_modifications, done}
after 100000 ->
ok
end,
receive
{mnesia_system_event, {mnesia_up, MyNode}} ->
check_data(node()),
Me ! {mnesia_up, node(), MyNode},
ok
after 100000 ->
ok
end.
distributed_set(Node) ->
mnesia:subscribe(system),
mnesia:dirty_write(#reunion_test_set{key=key1, value=value1}),
mnesia:dirty_write(#reunion_test_set{key=key2, value=value2}),
mnesia:dirty_write(#reunion_test_set{key=key5, value=value5}),
Me = self(),
MyNode = node(),
timer:sleep(1000),
erlang:spawn(Node, ?MODULE, distrib, [Me, MyNode]),
ok = receive
running -> ok
after 1000 ->
timeout
end,
net_kernel:disconnect(Node),
ok = receive
{mnesia_system_event, {mnesia_down, Node}} ->
ok
after 1000 ->
timeout
end,
mnesia:dirty_write(#reunion_test_set{key=key3, value=value3}),
mnesia:dirty_delete({reunion_test_set, key1}),
timer:sleep(1000),
reunion ! ping,
receive
{mnesia_system_event, {mnesia_up, Node}} ->
check_data(Node)
after 120000 ->
?assert(0)
end,
receive
{mnesia_up, Node, MyNode} -> ok
after 10000 ->
?assert(0)
end,
Result = [{reunion_test_set,key2,value2}, {reunion_test_set,key3,value3}] ++
case rpc:call(Node, erlang, whereis, [?MODULE]) of
undefined ->
% key5 was inserted and removed in too short time interval,
% this can't be detected without remote helper.
[#reunion_test_set{key=key5, value=value5}];
_ -> []
end ++
[{reunion_test_set,rkey1,rvalue1}],
Result = lists:sort(mnesia:dirty_match_object({reunion_test_set, '_', '_'})).
check_data(Remote) ->
[] = mnesia:dirty_read(reunion_test_set, key1), % removed locally
Expect = case rpc:call(Remote, erlang, whereis, [?MODULE]) of
undefined ->
[#reunion_test_set{key=key5, value=value5}];
_ -> []
end,
Expect = mnesia:dirty_read(reunion_test_set, key5), % removed remotely
[#reunion_test_set{key=rkey1, value=rvalue1}] =
mnesia:dirty_read(reunion_test_set, rkey1), % inserted remotely
[#reunion_test_set{key=key3, value=value3}] =
mnesia:dirty_read(reunion_test_set, key3). % inserted locally