public async Task CollectDisposedSnapshots()
{
var d = new SnapDictionary <int, string>();
d.Test.CollectAuto = false;
// gen 1
d.Set(1, "one");
Assert.AreEqual(1, d.Test.GetValues(1).Length);
Assert.AreEqual(1, d.Test.LiveGen);
Assert.IsTrue(d.Test.NextGen);
SnapDictionary <int, string> .Snapshot s1 = d.CreateSnapshot();
Assert.AreEqual(1, d.Test.LiveGen);
Assert.IsFalse(d.Test.NextGen);
// gen 2
d.Set(1, "two");
Assert.AreEqual(2, d.Test.GetValues(1).Length);
Assert.AreEqual(2, d.Test.LiveGen);
Assert.IsTrue(d.Test.NextGen);
SnapDictionary <int, string> .Snapshot s2 = d.CreateSnapshot();
Assert.AreEqual(2, d.Test.LiveGen);
Assert.IsFalse(d.Test.NextGen);
// gen 3
d.Set(1, "three");
Assert.AreEqual(3, d.Test.GetValues(1).Length);
Assert.AreEqual(3, d.Test.LiveGen);
Assert.IsTrue(d.Test.NextGen);
SnapDictionary <int, string> .Snapshot s3 = d.CreateSnapshot();
Assert.AreEqual(3, d.Test.LiveGen);
Assert.IsFalse(d.Test.NextGen);
Assert.AreEqual(3, d.SnapCount);
s1.Dispose();
await d.CollectAsync();
Assert.AreEqual(2, d.SnapCount);
Assert.AreEqual(2, d.Test.GetValues(1).Length);
s2.Dispose();
await d.CollectAsync();
Assert.AreEqual(1, d.SnapCount);
Assert.AreEqual(1, d.Test.GetValues(1).Length);
s3.Dispose();
await d.CollectAsync();
Assert.AreEqual(0, d.SnapCount);
Assert.AreEqual(1, d.Test.GetValues(1).Length);
}
