public void UpgradeStream_RunsAllUpgrades()
{
IEventUpgrade[] eventUpgrades = null;
var eventStream = new[] { (IEventMessage <DomainAggregateEvent>)EventMessage.FromEvent(Substitute.ForPartsOf <DomainAggregateEvent>(), null) };
var eventStream1 = new[] { (IEventMessage <DomainAggregateEvent>)EventMessage.FromEvent(Substitute.ForPartsOf <DomainAggregateEvent>(), null) };
var eventStream2 = new[] { (IEventMessage <DomainAggregateEvent>)EventMessage.FromEvent(Substitute.ForPartsOf <DomainAggregateEvent>(), null) };
var eventStream3 = new[] { (IEventMessage <DomainAggregateEvent>)EventMessage.FromEvent(Substitute.ForPartsOf <DomainAggregateEvent>(), null) };
var streamMetadata = new Dictionary <string, string>();
Func <IEventUpgrade[]> eventUpgradesFunc = () =>
{
eventUpgrades = new[]
{
Substitute.For <IEventUpgrade>(),
Substitute.For <IEventUpgrade>()
};
eventUpgrades[0].UpgradeStream(eventStream, streamMetadata).Returns(eventStream1);
eventUpgrades[1].UpgradeStream(eventStream1, streamMetadata).Returns(eventStream2);
return(eventUpgrades);
};
sequenceNumbersUpgrade.UpgradeSequenceNumbers(eventStream2).Returns(eventStream3);
sut = new EventStreamUpgrader(eventUpgradesFunc, sequenceNumbersUpgrade);
var result = sut.UpgradeStream(eventStream, streamMetadata);
result.Should().BeSameAs(eventStream3);
}
public IEnumerable <IEventMessage <DomainAggregateEvent> > UpgradeStream(
IEnumerable <IEventMessage <DomainAggregateEvent> > eventStream,
IReadOnlyDictionary <string, string> eventStreamMetadata)
{
var eventUpgrades = eventUpgradesFunc();
var result = eventStream;
foreach (var eventUpgrade in eventUpgrades)
{
result = eventUpgrade.UpgradeStream(result, eventStreamMetadata);
}
result = sequenceNumbersUpgrade.UpgradeSequenceNumbers(result);
return(result);
}