public async Task Given_An_Aggregate_With_An_Existing_Stream_When_A_Second_Event_Is_Written_With_An_Event_Id_Already_Used_In_The_Stream_Then_The_Second_Event_Is_Not_Written_To_The_Stream_And_The_Stream_Revision_Of_The_Aggregate_Reflects_This()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
EventStoreDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
Guid eventIdThatWeAreGoingToReUseToCauseAnIdempotentAppend = Guid.NewGuid();
// Act
TestAggregate testAggregateA = new TestAggregate(eventStreamId);
testAggregateA.BusinessLogicThatResultsInEventA("some value 1", eventIdThatWeAreGoingToReUseToCauseAnIdempotentAppend);
await eventStoreDomainRepository.SaveAsync(testAggregateA).ConfigureAwait(false);
long eventStreamRevisionAfterFirstEvent = testAggregateA.EventStreamRevision;
testAggregateA.BusinessLogicThatResultsInEventA("some value 2", eventIdThatWeAreGoingToReUseToCauseAnIdempotentAppend);
await eventStoreDomainRepository.SaveAsync(testAggregateA).ConfigureAwait(false);
long eventStreamRevisionAfterSecondEvent = testAggregateA.EventStreamRevision;
// Assert
Assert.Equal(1, eventStreamRevisionAfterFirstEvent);
Assert.Equal(1, eventStreamRevisionAfterSecondEvent);
}
public async Task Given_Preexisting_Aggregate_With_A_Stream_When_It_Is_Hydrated_Concurrently_Then_Acted_Upon_And_Saved_Should_Throw_Concurrency_Exception()
{
// Arrange
string streamId = Guid.NewGuid().ToEventStreamIdFormattedString();
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
eventStoreProvider.AppendEvents(streamId, new TestMessageB());
await eventStoreProvider.CommitEventsAsync(streamId, ExpectedStreamRevision.New).ConfigureAwait(false);
EventStoreDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
// Act
TestAggregate testAggregate1 = new TestAggregate(streamId);
TestAggregate testAggregate2 = new TestAggregate(streamId);
await eventStoreDomainRepository.LoadAsync(testAggregate1).ConfigureAwait(false);
await eventStoreDomainRepository.LoadAsync(testAggregate2).ConfigureAwait(false);
testAggregate1.BusinessLogicThatResultsInEventA(string.Empty);
testAggregate2.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregate1).ConfigureAwait(false);
// Assert
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreDomainRepository.SaveAsync(testAggregate2).ConfigureAwait(false)).ConfigureAwait(false);
}
public async Task Given_An_Uncommitted_Event_For_The_Aggregate_When_Save_Is_Called_Then_The_Event_Is_Added_To_The_Event_Store_With_Correct_Headers()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregate = new TestAggregate(eventStreamId);
testAggregate.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false);
IEnumerable <EventStoreMessage> messages = await eventStoreProvider.ReadEventsAsync(eventStreamId).ConfigureAwait(false);
EventStoreMessage[] eventStoreMessages = messages.ToArray();
// Assert
Assert.Single(eventStoreMessages);
Assert.Equal(3, eventStoreMessages[0].Headers.Count);
object headerValue = eventStoreMessages[0].Headers[EventStoreMessageHeaderKey.EventStreamId];
Assert.NotNull(headerValue);
Assert.Equal(eventStreamId, headerValue);
}
public async Task Given_A_Separate_Update_To_The_Event_Stream_When_Save_Is_Used_Then_An_Error_Is_Raised()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
// Create an aggregate with some events and save it.
TestAggregate testAggregateToSave = new TestAggregate(eventStreamId);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
// Load a new instance of the aggregate and add another event.
TestAggregate loadedTestAggregateA = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(loadedTestAggregateA).ConfigureAwait(false);
loadedTestAggregateA.BusinessLogicThatResultsInEventA(string.Empty);
// Load another instance of the aggregate, add another event and save it.
TestAggregate loadedTestAggregateB = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(loadedTestAggregateB).ConfigureAwait(false);
loadedTestAggregateB.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(loadedTestAggregateB).ConfigureAwait(false);
// Assert
// Save the first aggregate.
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreDomainRepository.SaveAsync(loadedTestAggregateA).ConfigureAwait(false)).ConfigureAwait(false);
}
public async Task Given_Three_Events_Stored_In_The_Event_Stream_Using_Discrete_Operations_When_The_Aggregate_Is_Loaded_Then_The_Aggregate_Revision_Is_Three()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregateToSave = new TestAggregate(eventStreamId);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
TestAggregate testAggregateToLoad = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(testAggregateToLoad).ConfigureAwait(false);
// Assert
Assert.Equal(3, testAggregateToLoad.EventStreamRevision);
}
public async Task Given_An_Invalid_Aggregate_When_LoadIfExists_Is_Called_Then_An_Error_Is_Raised()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
// Act
// Assert
await AssertExtensions.ThrowsAsync <EventSourcingException>(
async() => await eventStoreDomainRepository.LoadIfExistsAsync(new TestAggregateThatIsInvalid(string.Empty)).ConfigureAwait(false)).ConfigureAwait(false);
}
public GenericRepository(
IEventStoreProvider eventStoreProvider,
ISnapshotStoreProvider snapshotStoreProvider,
IAggregateRootFactory aggregateRootFactory,
IUnitOfWorkManager unitOfWorkManager)
{
_eventStoreProvider = eventStoreProvider;
_snapshotStoreProvider = snapshotStoreProvider;
_aggregateRootFactory = aggregateRootFactory;
_unitOfWorkManager = unitOfWorkManager;
}
public async Task Given_An_Invalid_Event_Stream_Id_When_Load_Is_Called_Then_An_Error_Is_Raised()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
TestAggregate testAggregate = new TestAggregate(eventStreamId);
// Act
// Assert
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreDomainRepository.LoadAsync(testAggregate).ConfigureAwait(false)).ConfigureAwait(false);
}
public async Task Given_An_Invalid_Event_Stream_Id_When_The_Exists_Check_Is_Called_Using_The_Event_Stream_Id_Then_The_Aggregate_Should_Report_As_Not_Existing()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
bool existsById = await eventStoreDomainRepository.ExistsAsync(eventStreamId).ConfigureAwait(false);
// Assert
Assert.False(existsById);
}
public async Task Given_No_Uncommitted_Events_For_The_Aggregate_When_Save_Is_Called_Then_An_Error_Is_Raised()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
// Assert
TestAggregate testAggregate = new TestAggregate(eventStreamId);
await AssertExtensions.ThrowsAsync <EventSourcingException>(
async() => await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false)).ConfigureAwait(false);
}
public async Task Given_An_Invalid_Event_Stream_Id_When_LoadIfExists_Is_Called_Then_False_Is_Returned()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
TestAggregate testAggregate = new TestAggregate(eventStreamId);
// Act
bool aggregateLoaded = await eventStoreDomainRepository.LoadIfExistsAsync(testAggregate).ConfigureAwait(false);
// Assert
Assert.False(aggregateLoaded);
}
public async Task Given_An_Aggregate_Which_Has_Not_Been_Saved_When_A_Snapshot_Is_Taken_Then_An_Error_Is_Raised()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
EventStoreDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregateToSave = new TestAggregate(eventStreamId);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
// Assert
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreDomainRepository.SaveSnapshotAsync(testAggregateToSave).ConfigureAwait(false)).ConfigureAwait(false);
}
public async Task Given_An_Uncommitted_Event_For_The_Aggregate_When_Save_Is_Called_Then_The_Event_Is_Added_To_The_Event_Store_And_The_EventStreamRevision_And_UncommittedEvents_Are_Updated_On_The_Aggregate()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregate = new TestAggregate(eventStreamId);
testAggregate.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false);
// Assert
Assert.Equal(0, testAggregate.UncommittedEvents.Count);
Assert.Equal(1, testAggregate.EventStreamRevision);
}
public async Task Given_An_Uncommitted_Event_For_The_Aggregate_When_Save_Is_Called_Then_The_Event_Is_Added_To_The_Event_Store()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregate = new TestAggregate(eventStreamId);
testAggregate.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false);
IEnumerable <EventStoreMessage> eventStoreMessages = await eventStoreProvider.ReadEventsAsync(eventStreamId).ConfigureAwait(false);
// Assert
Assert.Single(eventStoreMessages);
}
public async Task Given_A_Valid_Event_Stream_Id_When_The_Exists_Check_Is_Called_Using_The_Aggregate_Reference_Then_The_Aggregate_Should_Report_As_Not_Existing()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregateToSave = new TestAggregate(eventStreamId);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
bool existsByReference = await eventStoreDomainRepository.ExistsAsync(testAggregateToSave).ConfigureAwait(false);
// Assert
Assert.True(existsByReference);
}
public async Task Given_An_Empty_Stream_When_An_Event_Is_Written_To_The_Stream_Through_SaveWithoutConcurrencyCheck_Then_Aggregate_Reflects_The_Correct_Stream_Revision()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
EventStoreDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
Guid eventIdThatWeAreGoingToReUseToCauseAnIdempotentAppend = Guid.NewGuid();
// Act
TestAggregate testAggregateA = new TestAggregate(eventStreamId);
testAggregateA.BusinessLogicThatResultsInEventA("some value 1", eventIdThatWeAreGoingToReUseToCauseAnIdempotentAppend);
await eventStoreDomainRepository.SaveWithoutConcurrencyCheckAsync(testAggregateA).ConfigureAwait(false);
long eventStreamRevisionAfterFirstEvent = testAggregateA.EventStreamRevision;
// Assert
Assert.Equal(1, eventStreamRevisionAfterFirstEvent);
}
public async Task Given_A_Valid_Stream_Of_Events_When_The_Aggregate_Is_Loaded_Then_It_Does_So_Successfully()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
EventStoreMessage eventStoreMessage = new EventStoreMessage(Guid.NewGuid(), new TestMessageA());
eventStoreProvider.AppendEvents(eventStreamId, eventStoreMessage);
await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false);
TestAggregate testAggregate = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(testAggregate).ConfigureAwait(false);
// Assert
Assert.Equal(eventStreamId, testAggregate.EventStreamId);
Assert.Equal(0, testAggregate.UncommittedEvents.Count);
Assert.Equal(1, testAggregate.EventStreamRevision);
}
public async Task Given_An_Aggregate_With_Uncommitted_Events_When_The_Aggregate_Is_Saved_Then_Afterwards_The_Aggregate_Can_Be_Loaded_Successfully()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
TestAggregate testAggregateToSave = new TestAggregate(eventStreamId);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
TestAggregate loadedTestAggregate = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(loadedTestAggregate).ConfigureAwait(false);
// Assert
Assert.Equal(eventStreamId, loadedTestAggregate.EventStreamId);
Assert.Equal(0, loadedTestAggregate.UncommittedEvents.Count);
Assert.Equal(1, loadedTestAggregate.EventStreamRevision);
}
public async Task Given_An_Aggregate_Containing_Two_Events_With_The_Same_Id_When_The_Aggregate_Is_Saved_Then_Only_One_Event_Should_Written_To_The_Stream_And_A_Subsequent_Save_Of_The_Aggregate_Should_Succeed_Because_The_Stream_Revision_Of_The_Aggregate_Is_Kept_In_Sync()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
EventStoreDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
Guid eventIdA = Guid.NewGuid();
Guid eventIdB = Guid.NewGuid();
// Act
TestAggregate testAggregate = new TestAggregate(eventStreamId);
testAggregate.BusinessLogicThatResultsInEventA("some value 1", eventIdA);
testAggregate.BusinessLogicThatResultsInEventA("some value 2", eventIdA);
await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false);
testAggregate.BusinessLogicThatResultsInEventA("some value 3", eventIdB);
await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false);
// Assert
Assert.Equal(2, testAggregate.EventStreamRevision);
}
public async Task Given_A_Separate_Update_To_The_Event_Stream_When_SaveWithoutConcurrencyCheck_Is_Used_Then_No_Error_Is_Raised()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
// Create an aggregate with some events and save it.
TestAggregate testAggregateToSave = new TestAggregate(eventStreamId);
testAggregateToSave.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(testAggregateToSave).ConfigureAwait(false);
// Load a new instance of the aggregate and add another event.
TestAggregate loadedTestAggregateA = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(loadedTestAggregateA).ConfigureAwait(false);
loadedTestAggregateA.BusinessLogicThatResultsInEventA(string.Empty);
// Load another instance of the aggregate, add another event and save it.
TestAggregate loadedTestAggregateB = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(loadedTestAggregateB).ConfigureAwait(false);
loadedTestAggregateB.BusinessLogicThatResultsInEventA(string.Empty);
await eventStoreDomainRepository.SaveAsync(loadedTestAggregateB).ConfigureAwait(false);
// Save the first aggregate.
await eventStoreDomainRepository.SaveWithoutConcurrencyCheckAsync(loadedTestAggregateA).ConfigureAwait(false);
// Reload the aggregate so we can check it.
TestAggregate testAggregate = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(testAggregate).ConfigureAwait(false);
// Assert.
// Check that all 3 events have been applied to the aggregate.
Assert.Equal(3, testAggregate.EventStreamRevision);
}
public async Task Given_Events_Stored_For_The_Event_Stream_When_LoadIfExists_Is_Called_Then_True_Is_Returned_And_The_Aggregate_Can_Be_Loaded_Successfully()
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
IDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
eventStoreProvider.AppendEvents(eventStreamId, new EventStoreMessage(Guid.NewGuid(), new TestMessageA()));
await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false);
TestAggregate testAggregate = new TestAggregate(eventStreamId);
// Act
bool aggregateLoaded = await eventStoreDomainRepository.LoadIfExistsAsync(testAggregate).ConfigureAwait(false);
// Assert
Assert.True(aggregateLoaded);
Assert.Equal(eventStreamId, testAggregate.EventStreamId);
Assert.Equal(0, testAggregate.UncommittedEvents.Count);
Assert.Equal(1, testAggregate.EventStreamRevision);
Assert.NotNull(testAggregate.LastTestMessageA);
}
public async Task Given_An_Aggregate_Containing_Two_Events_With_The_Same_Id_When_The_Aggregate_Is_Saved_Then_Only_The_First_Event_Should_Written_To_The_Stream()
{
// Arrange
IEventStoreProvider eventStoreProvider = GetEventStoreProvider();
EventStoreDomainRepository eventStoreDomainRepository = new EventStoreDomainRepository(eventStoreProvider);
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
const string expectedValue = "the value we should end up with";
Guid eventId = Guid.NewGuid();
// Act
TestAggregate testAggregate = new TestAggregate(eventStreamId);
testAggregate.BusinessLogicThatResultsInEventA(expectedValue, eventId);
testAggregate.BusinessLogicThatResultsInEventA("some other value", eventId);
await eventStoreDomainRepository.SaveAsync(testAggregate).ConfigureAwait(false);
// Assert
TestAggregate testAggregateThatIsLoaded = new TestAggregate(eventStreamId);
await eventStoreDomainRepository.LoadAsync(testAggregateThatIsLoaded).ConfigureAwait(false);
Assert.Equal(1, testAggregateThatIsLoaded.EventStreamRevision);
Assert.Equal(0, testAggregateThatIsLoaded.UncommittedEvents.Count);
Assert.Equal(expectedValue, testAggregateThatIsLoaded.LastTestMessageA.Stuff);
}
public EventStoreDomainRepository(IEventStoreProvider eventStoreProvider)
{
this.eventStoreProvider = eventStoreProvider;
}
protected async Task Given_An_Appended_Event_When_CommitEvents_Is_Used_Then_The_Resulting_Event_Stream_Should_Contain_One_Event(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
EventStoreMessage eventStoreMessage = new EventStoreMessage(Guid.NewGuid(), new object());
eventStoreProvider.AppendEvents(eventStreamId, eventStoreMessage);
await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false);
// Assert
IEnumerable <EventStoreMessage> eventStoreMessages = await eventStoreProvider.ReadEventsAsync(eventStreamId).ConfigureAwait(false);
Assert.Single(eventStoreMessages);
}
protected async Task Given_Committed_Events_When_AppendEvents_Is_Used_Then_The_Resulting_Event_Stream_Should_Not_Be_Empty(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
object eventStoreMessage1 = new object();
object eventStoreMessage2 = new object();
// Act
eventStoreProvider.AppendEvents(eventStreamId, eventStoreMessage1, eventStoreMessage2);
await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false);
// Assert
IEnumerable <EventStoreMessage> eventStoreMessages = await eventStoreProvider.ReadEventsAsync(eventStreamId).ConfigureAwait(false);
Assert.Equal(2, eventStoreMessages.Count());
}
protected async Task Given_Uncommitted_Events_When_AppendEvents_Is_Used_Then_The_Resulting_Event_Stream_Should_Not_Exist(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
object eventStoreMessage1 = new object();
object eventStoreMessage2 = new object();
// Act
eventStoreProvider.AppendEvents(eventStreamId, eventStoreMessage1, eventStoreMessage2);
// Assert
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreProvider.ReadEventsAsync(eventStreamId).ConfigureAwait(false)).ConfigureAwait(false);
}
protected async Task Given_An_Existing_Stream_When_Events_Are_Committed_With_Expectation_Of_New_Stream_Then_An_Error_Is_Raised(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
object eventStoreMessage1 = new object();
object eventStoreMessage2 = new object();
// Act
eventStoreProvider.AppendEvents(eventStreamId, eventStoreMessage1);
await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false);
eventStoreProvider.AppendEvents(eventStreamId, eventStoreMessage2);
// Assert
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false)).ConfigureAwait(false);
}
protected async Task Given_A_Snapshot_Of_Different_Type_Exists_When_Checking_A_Snapshot_Then_False_Is_Returned(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
string snapshotStreamId = string.Format(CultureInfo.InvariantCulture, "{0}-snapshot", eventStreamId);
Guid snapshotId = Guid.NewGuid();
const int streamRevision = 3;
// Act
eventStoreProvider.AppendEvents(eventStreamId, new object(), new object(), new object());
await eventStoreProvider.CommitEventsAsync(eventStreamId, ExpectedStreamRevision.New).ConfigureAwait(false);
EventStoreSnapshot eventStoreSnapshotToBeWritten = new EventStoreSnapshot(snapshotId, streamRevision, new object());
await eventStoreProvider.AddSnapshotAsync(eventStreamId, snapshotStreamId, eventStoreSnapshotToBeWritten).ConfigureAwait(false);
bool snapshotExists = await eventStoreProvider.CheckSnapshotExistsAsync <TestAggregateSnapshot>(snapshotStreamId).ConfigureAwait(false);
// Assert
Assert.False(snapshotExists);
}
protected async Task Given_No_Snapshots_For_A_Stream_When_Checking_A_Snapshot_Exists_Then_False_Is_Returned(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
bool snapshotExists = await eventStoreProvider.CheckSnapshotExistsAsync <TestAggregateSnapshot>(eventStreamId).ConfigureAwait(false);
// Assert
Assert.False(snapshotExists);
}
protected async Task Given_No_Snapshots_For_A_Stream_When_Reading_A_Snapshot_Then_An_Error_Is_Raised(IEventStoreProvider eventStoreProvider)
{
// Arrange
string eventStreamId = Guid.NewGuid().ToEventStreamIdFormattedString();
// Act
// Assert
await AssertExtensions.ThrowsAsync <EventStreamNotFoundException>(
async() => await eventStoreProvider.ReadSnapshotAsync(eventStreamId).ConfigureAwait(false)).ConfigureAwait(false);
}
