public void Replace_WithPredicate_OnTimestampedValues_Updates_IfNewer()
{
IEnumerable <TimestampedInt> originalItems = new[]
{
new TimestampedInt(1, new DateTime(2017, 09, 08, 18, 56, 00, DateTimeKind.Utc)),
new TimestampedInt(2, new DateTime(2016, 01, 01, 10, 00, 00, DateTimeKind.Utc))
};
// A newer replacement
TimestampedInt replacement = new TimestampedInt(3, new DateTime(2018, 01, 01, 01, 08, 00, DateTimeKind.Utc));
var loader = new ThreadSafeAsyncLoader <TimestampedInt>(seqFactory: Seq.ListBased, loadDataAsync: _ => Task.FromResult(originalItems));
loader.LoadAsync();
// --- Perform ---
loader.Replace(i => i.Value == 1, replacement);
loader.Should().BeEquivalentTo(new[] { replacement, originalItems.ElementAt(1) });
}
public void Replace_OnTimestampedValues_DoesNotUpdate_IfOlder()
{
IEnumerable <TimestampedInt> originalItems = new[]
{
new TimestampedInt(1, new DateTime(2017, 09, 08, 18, 56, 00, DateTimeKind.Utc)),
new TimestampedInt(2, new DateTime(2016, 01, 01, 10, 00, 00, DateTimeKind.Utc))
};
// An older replacement
TimestampedInt replacement = new TimestampedInt(3, new DateTime(2017, 01, 01, 01, 08, 00, DateTimeKind.Utc));
var loader = new ThreadSafeAsyncLoader <TimestampedInt>(
seqFactory: Seq.ListBased,
loadDataAsync: _ => Task.FromResult(originalItems),
identityComparer: new TimestampedIntValueComparer());
loader.LoadAsync();
// --- Perform ---
loader.Replace(originalItems.ElementAt(0), replacement);
loader.Should().BeEquivalentTo(originalItems);
}
public override bool Equals(object obj)
{
TimestampedInt other = obj as TimestampedInt;
return(other != null && this.Value == other.Value && this.LastUpdated == other.LastUpdated);
}
