public async Task If_events_have_been_processed_after_initial_replay_then_the_remaining_time_is_estimated_correctly()
{
//arrange
//Initial replay
Events.Write(10);
var projector = new TestProjector();
await RunCatchup(projector);
//new set of events come in
IEnumerable <EventHandlerProgress> progress = null;
Events.Write(10);
var eventsProcessed = 0;
projector.DoSomething = e =>
{
if (eventsProcessed == 5)
{
progress = EventHandlerProgressCalculator.Calculate(() => ReadModelDbContext());
}
VirtualClock.Current.AdvanceBy(TimeSpan.FromSeconds(1));
eventsProcessed++;
};
//act
await RunCatchup(projector);
progress.First(p => p.Name == EventHandler.FullName(projector))
.TimeRemainingForCatchup.Value
.Should()
.Be(TimeSpan.FromSeconds(5));
}
public async Task If_events_have_been_processed_then_the_correct_number_of_remaining_events_is_returned()
{
//arrange
IEnumerable <EventHandlerProgress> progress = null;
Events.Write(5);
var eventsProcessed = 0;
var projector = new TestProjector
{
DoSomething = e =>
{
if (eventsProcessed == 4)
{
progress = EventHandlerProgressCalculator.Calculate(() => ReadModelDbContext());
}
eventsProcessed++;
}
};
//act
await RunCatchup(projector);
//assert
progress.First(p => p.Name == EventHandler.FullName(projector))
.EventsRemaining
.Should()
.Be(1);
}
public async Task If_events_have_been_processed_after_initial_replay_then_the_number_of_events_for_initial_replay_is_saved()
{
//arrange
ResetReadModelInfo();
var projector = new TestProjector
{
DoSomething = e => VirtualClock.Current.AdvanceBy(TimeSpan.FromSeconds(1))
};
//Initial replay
Events.Write(10);
await RunCatchup(projector);
//new set of events come in
Events.Write(5);
await RunCatchup(projector);
//act
var progress = EventHandlerProgressCalculator.Calculate(() => ReadModelDbContext());
//assert
progress.First(p => p.Name == EventHandler.FullName(projector))
.InitialCatchupEvents.Value
.Should()
.Be(10);
}
public async Task If_no_events_have_been_processed_then_the_remaining_time_is_null()
{
//arrange
ResetReadModelInfo();
Events.Write(5);
//act
var progress = EventHandlerProgressCalculator.Calculate(() => ReadModelDbContext());
//assert
progress.First(p => p.Name == EventHandler.FullName(new TestProjector()))
.TimeRemainingForCatchup
.HasValue
.Should()
.BeFalse();
}
public async Task If_all_events_have_been_processed_then_the_percentage_completed_is_100()
{
//arrange
Events.Write(5);
var projector = new TestProjector();
await RunCatchup(projector);
//act
var progress = EventHandlerProgressCalculator.Calculate(() => ReadModelDbContext());
//assert
progress.First(p => p.Name == EventHandler.FullName(projector))
.PercentageCompleted
.Should()
.Be(100);
}
public async Task If_all_events_have_been_processed_then_the_remaining_time_is_zero()
{
//arrange
var projector = new TestProjector();
Events.Write(5);
await RunCatchup(projector);
//act
var progress = EventHandlerProgressCalculator.Calculate(() => ReadModelDbContext());
//assert
progress.First(p => p.Name == EventHandler.FullName(projector))
.TimeRemainingForCatchup
.Value
.Should()
.Be(TimeSpan.FromMinutes(0));
}