| % 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(erlfdb_04_snapshot_test). |
| |
| -include_lib("eunit/include/eunit.hrl"). |
| |
| |
| snapshot_from_tx_test() -> |
| Db = erlfdb_util:get_test_db(), |
| Key = gen(10), |
| Val = gen(10), |
| erlfdb:set(Db, Key, Val), |
| erlfdb:transactional(Db, fun(Tx) -> |
| ?assertEqual(Val, erlfdb:wait(erlfdb:get_ss(Tx, Key))), |
| Ss = erlfdb:snapshot(Tx), |
| ?assertEqual(Val, erlfdb:wait(erlfdb:get(Ss, Key))) |
| end). |
| |
| |
| snapshot_from_a_snapshot_test() -> |
| Db = erlfdb_util:get_test_db(), |
| Key = gen(10), |
| Val = gen(10), |
| erlfdb:set(Db, Key, Val), |
| erlfdb:transactional(Db, fun(Tx) -> |
| Ss = erlfdb:snapshot(Tx), |
| ?assertEqual(Val, erlfdb:wait(erlfdb:get_ss(Ss, Key))), |
| Ss = erlfdb:snapshot(Ss) |
| end). |
| |
| |
| gen(Size) when is_integer(Size), Size > 1 -> |
| RandBin = crypto:strong_rand_bytes(Size - 1), |
| <<0, RandBin/binary>>. |