public When_an_event_is_mapped_as_a_delete()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductDiscontinuedEvent>()
.AsDeleteOf(e => e.ProductKey)
.ThrowingIfMissing();
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Delete = (key, context) =>
{
isDeleted = true;
return(Task.FromResult(true));
}
});
});
When(async() =>
{
await map.Handle(
new ProductDiscontinuedEvent
{
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_deleting_a_non_existing_event_should_be_handled_manually_from_context()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductDiscontinuedEvent>()
.AsDeleteOf((e, context) => context.EventHeaders["ProductId"] as string)
.HandlingMissesUsing((key, context) =>
{
missedKey = key;
});
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Delete = (key, context) => Task.FromResult(false)
});
});
WhenLater(async() =>
{
await map.Handle(
new ProductDiscontinuedEvent
{
ProductKey = "c350E"
},
new ProjectionContext()
{
EventHeaders = new Dictionary <string, object>(1)
{
{ "ProductId", "1234" }
}
});
});
}
public When_deleting_a_non_existing_event_should_be_handled_manually()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductDiscontinuedEvent>()
.AsDeleteOf(e => e.ProductKey)
.HandlingMissesUsing((key, context) =>
{
missedKey = key;
});
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Delete = (key, context) => Task.FromResult(false)
});
});
WhenLater(async() =>
{
await map.Handle(
new ProductDiscontinuedEvent
{
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_an_event_is_mapped_as_a_custom_action()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <object>();
mapBuilder.Map <ProductDiscontinuedEvent>().As((@event, context) =>
{
involvedKey = @event.ProductKey;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <object>
{
Custom = (context, projector) => projector()
});
});
When(async() =>
{
await map.Handle(
new ProductDiscontinuedEvent
{
ProductKey = "c350E"
},
new object());
});
}
public When_a_condition_is_not_met()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <object>();
mapBuilder.Map <ProductAddedToCatalogEvent>()
.When(e => e.Category == "Electric")
.As((e, ctx) =>
{
projection.Category = e.Category;
return(Task.FromResult(0));
});
mapBuilder.HandleCustomActionsAs((context, projector) =>
{
throw new InvalidOperationException("Custom action should not be called.");
});
map = mapBuilder.Build();
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new object());
});
}
public When_a_condition_is_met()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <object>();
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.When(e => e.Category == "Hybrids")
.As((e, ctx) =>
{
involvedKey = e.ProductKey;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <object>
{
Custom = (context, projector) => projector()
});
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new object());
});
}
public When_an_updating_event_should_ignore_missing_projections()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.AsUpdateOf(e => e.ProductKey)
.IgnoringMisses()
.Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Update = (key, context, projector, createIfMissing) => Task.FromResult(false)
});
});
WhenLater(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new ProjectionContext());
});
}
private Task StreamMessageReceived(EventResponse streamMessage)
{
var @event = DeserializeJsonEvent(streamMessage);
_map.Handle(@event, _events);
return(Task.CompletedTask);
}
public async Task ProjectEvent(object anEvent, NHibernateProjectionContext context)
{
foreach (INHibernateChildProjector child in children)
{
await child.ProjectEvent(anEvent, context).ConfigureAwait(false);
}
await map.Handle(anEvent, context).ConfigureAwait(false);
}
private async Task ProjectEvent(object anEvent, ProjectionContext context)
{
foreach (var child in _children)
{
await child.ProjectEvent(anEvent, context);
}
// There is no way to identify the child projector when an exception happens so we don't handle exceptions here.
await _map.Handle(anEvent, context);
}
public When_an_event_is_mapped_as_a_create_if_does_not_exist()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.AsCreateIfDoesNotExistOf(e => e.ProductKey)
.Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
mapBuilder.HandleProjectionModificationsAs(async(key, context, projector, options) =>
{
projection = new ProductCatalogEntry
{
Id = key,
};
this.options = options;
await projector(projection);
});
mapBuilder.HandleProjectionDeletionsAs((key, context, options) =>
{
throw new InvalidOperationException("Deletion should not be called.");
});
mapBuilder.HandleCustomActionsAs((context, projector) =>
{
throw new InvalidOperationException("Custom action should not be called.");
});
map = mapBuilder.Build();
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_a_condition_is_not_met_on_a_projection()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder.HandleProjectionModificationsAs(async(key, context, projector, options) =>
{
projection = new ProductCatalogEntry
{
Id = key,
};
await projector(projection);
});
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.When(e => e.Category == "Electric")
.AsUpdateOf(e => e.ProductKey)
.Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
mapBuilder.HandleProjectionDeletionsAs((key, context, options) =>
{
throw new InvalidOperationException("Deletion should not be called.");
});
mapBuilder.HandleCustomActionsAs((context, projector) =>
{
throw new InvalidOperationException("Custom action should not be called.");
});
map = mapBuilder.Build();
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_a_creating_event_should_allow_manual_handling_of_duplicates()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.AsCreateOf(e => e.ProductKey)
.HandlingDuplicatesUsing((duplicate, @event, context) =>
{
duplicateProjection = existingProjection;
return(true);
})
.Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
existingProjection = new ProductCatalogEntry
{
Id = "c350E",
Category = "OldCategory",
};
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Create = async(key, context, projector, shouldOverwrite) =>
{
if (shouldOverwrite(existingProjection))
{
await projector(existingProjection);
}
}
});
});
When(async() =>
{
await map.Handle(new ProductAddedToCatalogEvent
{
Category = "NewCategory",
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_an_updating_event_should_create_a_missing_projection_from_context()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.AsUpdateOf((e, context) => context.EventHeaders["ProductId"] as string)
.CreatingIfMissing()
.Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Update = (key, context, projector, createIfMissing) =>
{
shouldCreate = true;
return(Task.FromResult(0));
}
});
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new ProjectionContext()
{
EventHeaders = new Dictionary <string, object>(1)
{
{ "ProductId", "1234" }
}
});
});
}
public When_a_creating_event_must_ignore_an_existing_projection()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.AsCreateOf(e => e.ProductKey).IgnoringDuplicates()
.Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
existingProjection = new ProductCatalogEntry
{
Id = "c350E",
Category = "Fosile",
};
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Create = async(key, context, projector, shouldOverwrite) =>
{
if (shouldOverwrite(existingProjection))
{
await projector(existingProjection);
}
}
});
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_an_event_is_mapped_as_a_delete_if_exists()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder.Map <ProductDiscontinuedEvent>().AsDeleteIfExistsOf(e => e.ProductKey);
mapBuilder.HandleProjectionDeletionsAs((key, context, options) =>
{
projection = new ProductCatalogEntry
{
Id = key,
Deleted = true
};
this.options = options;
return(Task.FromResult(0));
});
mapBuilder.HandleProjectionModificationsAs((key, context, projector, options) =>
{
throw new InvalidOperationException("Modification should not be called.");
});
mapBuilder.HandleCustomActionsAs((context, projector) =>
{
throw new InvalidOperationException("Custom action should not be called.");
});
map = mapBuilder.Build();
});
When(async() =>
{
await map.Handle(
new ProductDiscontinuedEvent
{
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_an_event_is_mapped_as_a_custom_action_on_a_projection()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder.HandleCustomActionsAs((context, projector) =>
{
customActionDecoratorExecuted = true;
return(projector());
});
mapBuilder.HandleProjectionModificationsAs((key, context, projector, options) =>
{
throw new InvalidOperationException("Modification should not be called.");
});
mapBuilder.HandleProjectionDeletionsAs((key, context, options) =>
{
throw new InvalidOperationException("Deletion should not be called.");
});
mapBuilder.Map <ProductDiscontinuedEvent>().As((@event, context) =>
{
involvedKey = @event.ProductKey;
return(Task.FromResult(0));
});
map = mapBuilder.Build();
});
When(async() =>
{
await map.Handle(
new ProductDiscontinuedEvent
{
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public When_an_updating_event_should_throw_on_misses()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder.Map <ProductAddedToCatalogEvent>().AsUpdateOf(e => e.ProductKey).Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
existingProjection = new ProductCatalogEntry
{
Id = "c350E",
Category = "OldCategory",
};
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Update = async(key, context, projector, createIfMissing) =>
{
if (createIfMissing())
{
await projector(existingProjection);
}
}
});
});
WhenLater(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
ProductKey = "c350E",
Category = "NewCategory"
},
new ProjectionContext());
});
}
public When_a_global_filter_is_not_met()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <object>()
.Where((@event, context) =>
{
if (@event is ProductAddedToCatalogEvent addedEvent)
{
return(Task.FromResult(addedEvent.Category == "Electric"));
}
return(Task.FromResult(true));
});
mapBuilder
.Map <ProductAddedToCatalogEvent>()
.As((e, ctx) =>
{
involvedKey = e.ProductKey;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <object>
{
Custom = (context, projector) => projector()
});
});
When(async() =>
{
await map.Handle(
new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new object());
});
}
public When_event_should_create_a_new_projection_from_context()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder.Map <ProductAddedToCatalogEvent>().AsCreateOf((e, context) => context.EventHeaders["ProductId"] as string).Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Create = async(key, context, projector, shouldOverwrite) =>
{
projection = new ProductCatalogEntry
{
Id = key,
};
await projector(projection);
}
});
});
When(async() =>
{
await map.Handle(new ProductAddedToCatalogEvent
{
Category = "Hybrids"
},
new ProjectionContext()
{
EventHeaders = new Dictionary <string, object>(1)
{
{ "ProductId", "1234" }
}
});
});
}
public When_event_should_create_a_new_projection()
{
Given(() =>
{
var mapBuilder = new EventMapBuilder <ProductCatalogEntry, string, ProjectionContext>();
mapBuilder.Map <ProductAddedToCatalogEvent>().AsCreateOf(e => e.ProductKey).Using((p, e, ctx) =>
{
p.Category = e.Category;
return(Task.FromResult(0));
});
map = mapBuilder.Build(new ProjectorMap <ProductCatalogEntry, string, ProjectionContext>
{
Create = async(key, context, projector, shouldOverwrite) =>
{
projection = new ProductCatalogEntry
{
Id = key,
};
await projector(projection);
}
});
});
When(async() =>
{
await map.Handle(new ProductAddedToCatalogEvent
{
Category = "Hybrids",
ProductKey = "c350E"
},
new ProjectionContext());
});
}
public async Task ProjectEvent(object anEvent, EntityFrameworkProjectionContext context)
{
context.WasHandled = await _eventMap.Handle(anEvent, context).ConfigureAwait(false);
}
private async Task StreamMessageReceived(IStreamSubscription subscription, StreamMessage streamMessage, CancellationToken cancellationToken)
{
var @event = await DeserializeJsonEvent(streamMessage, cancellationToken);
await _map.Handle(@event, Balance);
}
