private static MongoEventStore CreateStore(
List <StreamConfiguration> streams,
MongoFake db = null,
BatchIDGenerator idGenerator = null,
bool preserveLog = false,
bool callUpgrade = true
)
{
db = db ?? new MongoFake();
idGenerator = idGenerator ?? new LoggingIDGenerator();
ConfigureSerialization(new GuidSerializer(BsonType.Binary));
MongoEventStore store = new MongoEventStore(
db,
new EventStoreSettings(streams),
idGenerator
);
if (callUpgrade)
{
store.Upgrade().Wait();
}
if (!preserveLog)
{
db.Log.Clear();
}
return(store);
}
internal void BatchIDGeneratorTests(
BatchIDGenerator gen,
TestClock clock,
DateTime now,
EventIDGenerator res,
EventID id
)
{
GIVEN["a generator without a last EventID"] = () => {
clock = new TestClock();
gen = BatchIDGenerator.Create(clock: clock);
};
GIVEN["a preset time"] = () => clock.SetUtcNow(now = DateTime.UtcNow);
WHEN["calling GetBatch"] = () => res = gen.GetBatch().Result;
AND["getting the first ID"] = () => id = res.Next();
THEN["its event sequence is 1"] = () => id.Sequence.Should().Be(1);
AND["its batch sequence is 1"] = () => id.BatchID.Sequence.Should().Be(1);
AND["its timestamp is correct"] = () => id.BatchID.Timestamp.Should().BeCloseTo(now, precision: 10);
GIVEN["a new time very close to last"] = () => clock.SetUtcNow(now.AddTicks(1));
WHEN["calling GetBatch again"] = () => id = gen.GetBatch().Result.Next();
THEN["the event sequence of first EventID is 1"] = () => id.Sequence.Should().Be(1);
AND["its batch sequence is 2"] = () => id.BatchID.Sequence.Should().Be(2);
GIVEN["a new time"] = () => clock.SetUtcNow(now = now.AddMilliseconds(10));
WHEN["calling GetBatch"] = () => id = gen.GetBatch().Result.Next();
THEN["the event sequence of first EventID is 1"] = () => id.Sequence.Should().Be(1);
AND["its batch sequence is 1"] = () => id.BatchID.Sequence.Should().Be(1);
AND["its timestamp is correct"] = () => id.BatchID.Timestamp.Should().BeCloseTo(now, precision: 10);
GIVEN["a new time"] = () => clock.SetUtcNow(now = now.AddMilliseconds(10));
THEN["calling GetBatch for 511 times takes less than 10ms"] = () => {
Action action = () => Enumerable.Range(1, 511).ForEach(i => res = gen.GetBatch().Result);
action.ExecutionTime().Should().BeLessThan(100.Milliseconds());
};
AND["the batch sequence of the first EventID is 511 (max)"] = () => (id = res.Next()).BatchID.Sequence.Should().Be(511);
Then["calling GetBatch once more", ThrowsA <EventStoreException>()] = () => gen.GetBatch();
GIVEN["a clock the advances with each call"] = () => clock.SetUtcNow(new PresetTimes(now, now.AddTicks(1), now = now.AddMilliseconds(20)));
WHEN["calling GetBatch"] = () => id = gen.GetBatch().Result.Next();
AND["its batch sequence is 1"] = () => id.BatchID.Sequence.Should().Be(1);
AND["its timestamp is correct"] = () => id.BatchID.Timestamp.Should().BeCloseTo(now, precision: 10);
}