public static void Main(string[] args)
{
var es = new Eventstore <InMemoryEventRepository>();
var a = new A();
var b = new B();
var c = new C();
es.Record(null, a);
es.Record(a.Id, c);
es.Record(c.Id, b);
EventArchive.Write("myarchive.json", es.Replay());
var events = EventArchive.Read("myarchive.json");
var es2 = new Eventstore <InMemoryEventRepository>();
EventId id = null;
events.ToList().ForEach(delegate(IEvent e)
{
es2.Record(id, e);
id = e.Id;
});
Console.WriteLine(es2.Replay().ToList().Count);
}
public void Notification_about_events_recorded()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Notification_about_events_recorded);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent[] result = (null);
sut.OnRecorded += (e) => result = (e);
IEvent e0 = new TestEvent {
Foo = "a"
};
sut.Record(null, e0);
Assert.Equal(e0.Id, result.Last().Id);
Assert.Single(result);
IEvent e1 = new TestEvent {
Foo = "b"
};
IEvent e2 = new TestEvent {
Foo = "c"
};
sut.Record(e0.Id, new[] { e1, e2 });
Assert.Equal(e2.Id, result.Last().Id);
Assert.Equal(new[] { "b", "c" }, result.Select(e => ((TestEvent)e).Foo).ToArray());
}
public void Recording_fails_with_wrong_version()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Recording_fails_with_wrong_version);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent e0 = new TestEvent {
Foo = "a"
};
sut.Record(null, e0);
var state0 = sut.LastEventId;
IEvent e1 = new TestEvent {
Foo = "a"
};
sut.Record(e0.Id, e1);
var result = sut.LastEventId;
Assert.NotEqual(state0, result);
Assert.Throws <VersionNotFoundException>(() => sut.Record(state0, new AnotherTestEvent {
Bar = 1
}));
}
public void Version_number_changes()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Version_number_changes);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent e0 = new TestEvent();
sut.Record(null, e0);
var result0 = sut.LastEventId;
Assert.Equal(e0.Id, result0);
IEvent e1 = new TestEvent();
sut.Record(e0.Id, e1);
var result1 = sut.LastEventId;
Assert.Equal(e1.Id, result1);
IEvent e2 = new TestEvent();
IEvent e3 = new TestEvent();
sut.Record(e1.Id, new[] { e2, e3 });
var result2 = sut.LastEventId;
Assert.Equal(e3.Id, result2);
}
public void Basic_recording_and_replaying()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Basic_recording_and_replaying);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent e0 = new TestEvent {
Foo = "a"
};
sut.Record(null, e0);
IEvent e1 = new TestEvent {
Foo = "b"
};
IEvent e2 = new TestEvent {
Foo = "c"
};
sut.Record(e0.Id, new[] { e1, e2 });
var result = sut.Replay();
Assert.Equal(new[] { "a", "b", "c" }, result.Select(e => ((TestEvent)e).Foo).ToArray());
}
public void Recording_succeeds_with_right_version()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Recording_succeeds_with_right_version);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
var state0 = sut.LastEventId;
IEvent e0 = new TestEvent {
Foo = "a"
};
sut.Record(null, e0);
var result = sut.LastEventId;
Assert.NotEqual(state0, result);
IEvent e1 = new AnotherTestEvent {
Bar = 1
};
sut.Record(e0.Id, e1);
var result2 = sut.LastEventId;
Assert.NotEqual(result, result2);
}
public void InMemoryEventstore_acceptance_test()
{
using (var sut = new Eventstore <InMemoryEventRepository>())
{
IEvent e0 = new TodoAdded("do dishes");
sut.Record(null, e0);
IEvent e1 = new TodoAdded("walk dog");
sut.Record(e0.Id, e1);
IEvent e2 = new TodoAdded("write report");
IEvent e3 = new TodoCategorized(e2.Id.ToString(), "work");
sut.Record(e1.Id, new IEvent[] { e2, e3 });
IEvent e4 = new TodoDone(e0.Id.ToString());
sut.Record(e3.Id, e4);
var result = sut.Replay();
var todos = result.Aggregate(new Dictionary <string, ToDoItem>(), Map);
Assert.Equal(2, todos.Count);
Assert.Equal("write report", todos[e2.Id.ToString()].Subject);
Assert.Contains("work", todos[e2.Id.ToString()].Categories);
Dictionary <string, ToDoItem> Map(Dictionary <string, ToDoItem> items, IEvent e)
{
switch (e)
{
case TodoAdded a:
items[a.Id.ToString()] = new ToDoItem {
Id = a.Id.ToString(), Subject = a.Subject
};
break;
case TodoDone d:
items.Remove(d.EntityId);
break;
case TodoCategorized c:
foreach (var cat in c.Categories)
{
items[c.EntityId].Categories.Add(cat);
}
break;
}
return(items);
}
}
}
public void Replay_in_the_right_order_with_many_events()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Replay_in_the_right_order_with_many_events);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent e0 = null;
for (var i = 0; i < 50; i++)
{
IEvent ePrevious = e0;
e0 = new TestEvent {
Foo = i.ToString()
};
sut.Record(ePrevious == null ? null : ePrevious.Id, e0);
}
var result = sut.Replay();
var prev = -1;
foreach (var v in result.Select(x => int.Parse(((TestEvent)x).Foo)))
{
Assert.Equal(1, v - prev);
prev = v;
}
}
public void Replaying_a_subset()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Replaying_a_subset);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent e0 = new TestEvent {
Foo = "a"
};
IEvent e1 = new AnotherTestEvent {
Bar = 1
};
IEvent e2 = new AnotherTestEvent {
Bar = 2
};
IEvent e3 = new TestEvent {
Foo = "b"
};
IEvent e4 = new AnotherTestEvent {
Bar = 3
};
sut.Record(null, new IEvent[] { e0, e1, e2, e3, e4 });
var result = sut.Replay();
Assert.Equal(e4.Id, result.Last().Id);
Assert.Equal(5, result.Count());
}
public void Replaying_from_event_id()
{
const string PATH = nameof(FolderEventstore_tests) + "_" + nameof(Replaying_from_event_id);
if (Directory.Exists(PATH))
{
Directory.Delete(PATH, true);
}
var sut = new Eventstore <FilesInFolderEventRepository>(PATH);
IEvent e0 = new TestEvent {
Foo = "a"
};
IEvent e1 = new AnotherTestEvent {
Bar = 1
};
IEvent e2 = new AnotherTestEvent {
Bar = 2
};
IEvent e3 = new TestEvent {
Foo = "b"
};
IEvent e4 = new AnotherTestEvent {
Bar = 3
};
sut.Record(null, new IEvent[] { e0, e1, e2, e3, e4 });
Replay_from_somewhere_in_the_middle();
Replay_from_before_the_beginning();
Replay_from_after_the_end();
void Replay_from_somewhere_in_the_middle()
{
var result = sut.Replay(e2.Id);
Assert.Equal(3, result.Count());
Assert.Equal(2, ((AnotherTestEvent)result.ElementAt(0)).Bar);
Assert.Equal("b", ((TestEvent)result.ElementAt(1)).Foo);
Assert.Equal(3, ((AnotherTestEvent)result.ElementAt(2)).Bar);
result = sut.Replay(e4.Id);
Assert.Single(result);
result = sut.Replay(e0.Id);
Assert.Equal(5, result.Count());
}
void Replay_from_before_the_beginning()
{
var result = sut.Replay();
Assert.Equal(5, result.Count());
}
void Replay_from_after_the_end()
{
var result = sut.Replay(e4.Id);
Assert.Single(result);
}
}