public void RollForwardToPastNextSnapshot()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 30;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
storage.StoreCurrent(new TimeMarker((ulong)(i + 1)));
}
// The snapshot is at 2
storage.RollBackTo(new TimeMarker(16));
storage.RollForwardTo(new TimeMarker(26));
Assert.AreEqual(26, storage.Count);
int index = 0;
foreach (var pair in storage)
{
Assert.AreEqual(index, pair.Key);
Assert.AreEqual(index, pair.Value);
index++;
}
}
public void ClearVoidsForwardStack()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 10;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
}
storage.StoreCurrent(new TimeMarker(1));
storage[5] = maximumValue;
storage.StoreCurrent(new TimeMarker(2));
storage.RollBackTo(new TimeMarker(1));
storage.Clear();
storage.Add(maximumValue + 1, maximumValue + 1);
storage.StoreCurrent(new TimeMarker(3));
storage.RollForwardTo(new TimeMarker(2));
Assert.AreEqual(1, storage.Count);
Assert.IsTrue(storage.ContainsKey(maximumValue + 1));
}
public void RollForwardPastLastValue()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 10;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
storage.StoreCurrent(new TimeMarker((ulong)(i + 1)));
}
storage.RollBackTo(new TimeMarker(5));
storage.RollForwardTo(new TimeMarker((ulong)(maximumValue + 1)));
Assert.AreEqual(maximumValue, storage.Count);
int index = 0;
foreach (var pair in storage)
{
Assert.AreEqual(index, pair.Key);
Assert.AreEqual(index, pair.Value);
index++;
}
}
public void RollBackThroughUpdate()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 10;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
}
storage.StoreCurrent(new TimeMarker(1));
storage[5] = maximumValue;
storage.StoreCurrent(new TimeMarker(2));
storage.RollBackTo(new TimeMarker(1));
Assert.AreEqual(maximumValue, storage.Count);
int index = 0;
foreach (var pair in storage)
{
Assert.AreEqual(index, pair.Key);
Assert.AreEqual(index, pair.Value);
index++;
}
}
public void RollBackToLastSnapshot()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 30;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
storage.StoreCurrent(new TimeMarker((ulong)(i + 1)));
}
// The first snapshot is at 1, the next one is 20 further so it is at 21
storage.RollBackTo(new TimeMarker(21));
Assert.AreEqual(21, storage.Count);
int index = 0;
foreach (var pair in storage)
{
Assert.AreEqual(index, pair.Key);
Assert.AreEqual(index, pair.Value);
index++;
}
}
public void RollBackPastFirstValue()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 10;
for (int i = 1; i < maximumValue; i++)
{
storage.Add(i, i);
storage.StoreCurrent(new TimeMarker((ulong)(i + 1)));
}
storage.RollBackTo(new TimeMarker(0));
Assert.AreEqual(0, storage.Count);
}
public void AddVoidsForwardStack()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 10;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
}
storage.StoreCurrent(new TimeMarker(1));
storage[5] = maximumValue;
storage.StoreCurrent(new TimeMarker(2));
storage.RollBackTo(new TimeMarker(1));
storage.Add(11, 11);
storage.StoreCurrent(new TimeMarker(3));
storage.RollForwardTo(new TimeMarker(2));
Assert.AreEqual(maximumValue + 1, storage.Count);
int index = 0;
foreach (var pair in storage)
{
if (index < maximumValue)
{
Assert.AreEqual(index, pair.Key);
Assert.AreEqual(index, pair.Value);
}
else
{
Assert.AreEqual(index + 1, pair.Key);
Assert.AreEqual(index + 1, pair.Value);
}
index++;
}
}
public void RollBackMultipleTimes()
{
var storage = new DictionaryHistory <int, int>();
int maximumValue = 10;
for (int i = 0; i < maximumValue; i++)
{
storage.Add(i, i);
storage.StoreCurrent(new TimeMarker((ulong)(i + 1)));
}
for (int i = maximumValue; i > 0; i--)
{
storage.RollBackTo(new TimeMarker((ulong)i));
Assert.AreEqual(i, storage.Count);
for (int j = 1; j <= i; j++)
{
Assert.IsTrue(storage.ContainsKey(j - 1));
}
}
}
public void RollBackWithNoValues()
{
var storage = new DictionaryHistory <int, int>();
Assert.DoesNotThrow(() => storage.RollBackTo(new TimeMarker(1)));
}
