private static void VerifySnapshotTime(
VolatileLogicalTimeManager timeManager,
double lowerBound)
{
var snapshot = timeManager.Test_GetCurrentSnapshot();
var lower = GetTimestamp(lowerBound - LowerBoundBuffer);
var upper = GetTimestamp(lowerBound + UpperBoundBuffer);
FailTestIf(snapshot < lower, "snapshot={0} < lower={1}", snapshot, lower);
FailTestIf(snapshot > upper, "snapshot={0} > upper={1}", snapshot, upper);
}
private static void VerifyCurrentTime(
VolatileLogicalTimeManager timeManager,
double lowerBound)
{
var current = timeManager.CurrentLogicalTime;
var lower = GetTimestamp(lowerBound - LowerBoundBuffer);
var upper = GetTimestamp(lowerBound + UpperBoundBuffer);
FailTestIf(current < lower, "current={0} < lower={1}", current, lower);
FailTestIf(current > upper, "current={0} > upper={1}", current, upper);
}
public void SnapshotTest()
{
TestCase("### SnapshotTest ###");
var snapshotHandler = new SnapshotHandler();
var snapshotInterval = UpperBoundBuffer * 2;
var timeManager = new VolatileLogicalTimeManager(snapshotHandler, GetTimestamp(snapshotInterval));
VerifySnapshotTime(timeManager, 0);
VerifySnapshotCount(snapshotHandler, 0);
timeManager.Start();
WaitForSnapshotCount(snapshotHandler, 1, true, GetTimestamp(snapshotInterval + UpperBoundBuffer));
VerifyCurrentTime(timeManager, snapshotInterval);
VerifySnapshotTime(timeManager, snapshotInterval);
WaitForSnapshotCount(snapshotHandler, 2, true, GetTimestamp(snapshotInterval + UpperBoundBuffer));
VerifyCurrentTime(timeManager, snapshotInterval * 2);
VerifySnapshotTime(timeManager, snapshotInterval * 2);
timeManager.Stop();
WaitForSnapshotCount(snapshotHandler, 2, false, GetTimestamp(snapshotInterval));
VerifyCurrentTime(timeManager, snapshotInterval * 3);
VerifySnapshotTime(timeManager, snapshotInterval * 2);
timeManager.Start();
WaitForSnapshotCount(snapshotHandler, 3, true, GetTimestamp(snapshotInterval + UpperBoundBuffer));
VerifyCurrentTime(timeManager, snapshotInterval * 3);
VerifySnapshotTime(timeManager, snapshotInterval * 3);
timeManager.Stop();
WaitForSnapshotCount(snapshotHandler, 3, false, GetTimestamp(snapshotInterval));
VerifyCurrentTime(timeManager, snapshotInterval * 4);
VerifySnapshotTime(timeManager, snapshotInterval * 3);
}
public void CurrentLogicalTimeTest()
{
TestCase("### CurrentLogicalTimeTest ###");
var snapshotHandler = new SnapshotHandler();
var snapshotInterval = UpperBoundBuffer;
var timeManager = new VolatileLogicalTimeManager(snapshotHandler, GetTimestamp(snapshotInterval));
VerifyCurrentTime(timeManager, 0);
VerifySnapshotTime(timeManager, 0);
Thread.Sleep(GetTimestamp(2));
VerifyCurrentTime(timeManager, 2);
VerifySnapshotTime(timeManager, 0);
Thread.Sleep(GetTimestamp(3));
VerifyCurrentTime(timeManager, 5);
VerifySnapshotTime(timeManager, 0);
Thread.Sleep(GetTimestamp(3));
VerifyCurrentTime(timeManager, 8);
VerifySnapshotTime(timeManager, 0);
timeManager.CurrentLogicalTime = GetTimestamp(1);
VerifyCurrentTime(timeManager, 1);
VerifySnapshotTime(timeManager, 1);
timeManager.CurrentLogicalTime = GetTimestamp(5);
VerifyCurrentTime(timeManager, 5);
VerifySnapshotTime(timeManager, 5);
timeManager.CurrentLogicalTime = GetTimestamp(15);
Thread.Sleep(GetTimestamp(1));
VerifyCurrentTime(timeManager, 16);
VerifySnapshotTime(timeManager, 15);
}
