public void When_events_are_added_having_defined_SequenceNumbers_then_the_ids_are_maintained()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent { SequenceNumber = 3 });
events.Add(new TestEvent { SequenceNumber = 2 });
events.Add(new TestEvent { SequenceNumber = 1 });
events.First().SequenceNumber.Should().Be(events.Last().SequenceNumber - 2);
}
public void When_events_are_added_with_with_gaps_in_their_SequenceNumbers_then_they_are_assigned_the_next_sequential_value()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent { SequenceNumber = 22 });
events.Add(new TestEvent { SequenceNumber = 33 });
events.Add(new TestEvent());
events.Last().SequenceNumber.Should().Be(34);
}
public void EventSequence_version_returns_current_highest_SequenceNumber()
{
var sequence = new EventSequence(Guid.NewGuid());
sequence.Add(new TestEvent());
sequence.Add(new TestEvent());
sequence.Add(new TestEvent());
sequence.Version.Should().Be(3);
}
public void Events_are_ordered_by_SequenceNumber_regardless_of_the_order_in_which_they_are_added()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent { SequenceNumber = 3 });
events.Add(new TestEvent { SequenceNumber = 2 });
events.Add(new TestEvent { SequenceNumber = 1 });
events.Add(new TestEvent { SequenceNumber = 4 });
events.Select(e => e.SequenceNumber).Should().BeInAscendingOrder();
}
public void Events_added_out_of_order_do_not_have_their_SequenceNumbers_changed()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent { SequenceNumber = 3, Data = "3" });
events.Add(new TestEvent { SequenceNumber = 2, Data = "2" });
events.Add(new TestEvent { SequenceNumber = 1, Data = "1" });
events.Add(new TestEvent { SequenceNumber = 4, Data = "4" });
events.Cast<TestEvent>().Select(e => e.Data)
.SequenceEqual(new[] { "1", "2", "3", "4" });
}
public void When_events_are_added_without_defined_SequenceNumbers_then_they_are_assigned_the_next_sequential_value()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent {
SequenceNumber = 2
});
events.Add(new TestEvent());
events.Add(new TestEvent());
events.Last().SequenceNumber.Should().Be(4);
}
public void When_an_event_with_an_already_present_SequenceNumber_is_added_then_it_throws()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent {
SequenceNumber = 1
});
Action addAgain = () =>
events.Add(new TestEvent {
SequenceNumber = 1
});
addAgain.ShouldThrow <ArgumentException>();
}
public void When_events_are_added_having_defined_SequenceNumbers_then_the_ids_are_maintained()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent {
SequenceNumber = 3
});
events.Add(new TestEvent {
SequenceNumber = 2
});
events.Add(new TestEvent {
SequenceNumber = 1
});
events.First().SequenceNumber.Should().Be(events.Last().SequenceNumber - 2);
}
public void EventSequence_version_returns_current_highest_SequenceNumber_when_events_are_out_of_order()
{
var sequence = new EventSequence(Guid.NewGuid());
sequence.Add(new TestEvent {
SequenceNumber = 4
});
sequence.Add(new TestEvent {
SequenceNumber = 9000
});
sequence.Add(new TestEvent {
SequenceNumber = 9
});
sequence.Version.Should().Be(9000);
}
public void When_events_are_added_having_undefined_aggregate_id_then_the_EventSequence_SourceId_is_assigned()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent());
events.First().AggregateId.Should().Be(events.AggregateId);
}
public void When_events_are_added_having_undefined_aggregate_id_then_the_EventSequence_SourceId_is_assigned()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent());
events.First().AggregateId.Should().Be(events.AggregateId);
}
public void Events_are_ordered_by_SequenceNumber_regardless_of_the_order_in_which_they_are_added()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent {
SequenceNumber = 3
});
events.Add(new TestEvent {
SequenceNumber = 2
});
events.Add(new TestEvent {
SequenceNumber = 1
});
events.Add(new TestEvent {
SequenceNumber = 4
});
events.Select(e => e.SequenceNumber).Should().BeInAscendingOrder();
}
public void Events_added_out_of_order_do_not_have_their_SequenceNumbers_changed()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent {
SequenceNumber = 3, Data = "3"
});
events.Add(new TestEvent {
SequenceNumber = 2, Data = "2"
});
events.Add(new TestEvent {
SequenceNumber = 1, Data = "1"
});
events.Add(new TestEvent {
SequenceNumber = 4, Data = "4"
});
events.Cast <TestEvent>().Select(e => e.Data)
.SequenceEqual(new[] { "1", "2", "3", "4" });
}
public void When_an_event_with_an_already_present_SequenceNumber_is_added_then_it_throws()
{
var events = new EventSequence(Guid.NewGuid());
events.Add(new TestEvent { SequenceNumber = 1 });
Action addAgain = () =>
events.Add(new TestEvent { SequenceNumber = 1 });
addAgain.ShouldThrow<ArgumentException>();
}
public void EventSequence_version_returns_current_highest_SequenceNumber_when_events_are_out_of_order()
{
var sequence = new EventSequence(Guid.NewGuid());
sequence.Add(new TestEvent { SequenceNumber = 4 });
sequence.Add(new TestEvent { SequenceNumber = 9000 });
sequence.Add(new TestEvent { SequenceNumber = 9 });
sequence.Version.Should().Be(9000);
}
public void EventSequence_version_returns_current_highest_SequenceNumber()
{
var sequence = new EventSequence(Guid.NewGuid());
sequence.Add(new TestEvent());
sequence.Add(new TestEvent());
sequence.Add(new TestEvent());
sequence.Version.Should().Be(3);
}