public async void CanUpdateCar()
{
var documentRepository = new InMemoryDocumentRepository();
var inMemoryDb = documentRepository.Aggregates;
var dataStore = new DataStore(documentRepository);
var carId = Guid.NewGuid();
//Given
inMemoryDb.Add(
new Car
{
id = carId,
Make = "Toyota"
});
//When
await dataStore.UpdateById <Car>(carId, car => car.Make = "Ford");
await dataStore.CommitChanges();
//Then
//We have executed an update operation
Assert.NotNull(dataStore.ExecutedOperations.SingleOrDefault(e => e is UpdateOperation <Car>));
//We have no queued update operations
Assert.Null(dataStore.QueuedOperations.SingleOrDefault(e => e is QueuedUpdateOperation <Car>));
//The dataStore reads the changes correctly
Assert.Equal("Ford", dataStore.ReadActiveById <Car>(carId).Result.Make);
}
public async void WhenUpdateCarButDontCommitChangesOnlyTheLocalCacheIsAffected()
{
var documentRepository = new InMemoryDocumentRepository();
var inMemoryDb = documentRepository.Aggregates;
var dataStore = new DataStore(documentRepository);
var carId = Guid.NewGuid();
//Given
inMemoryDb.Add(
new Car
{
id = carId,
Make = "Toyota"
});
//When
await dataStore.UpdateById <Car>(carId, car => car.Make = "Ford");
//await dataStore.CommitChanges(); don't commit
//Then
//We have a queued update operation
Assert.NotNull(dataStore.QueuedOperations.SingleOrDefault(e => e is QueuedUpdateOperation <Car>));
//We have not execute any update operations
Assert.Null(dataStore.ExecutedOperations.SingleOrDefault(e => e is UpdateOperation <Car>));
//The underlying database has NOT changed
Assert.Equal("Toyota", inMemoryDb.OfType <Car>().Single(car => car.id == carId).Make);
//The DataStore instance picks up the change, because it has applied
//all the previous changes made during this session to any query.
Assert.Equal("Ford", dataStore.ReadActiveById <Car>(carId).Result.Make);
}
private InMemoryTestHarness()
{
DocumentRepository = new InMemoryDocumentRepository();
DataStore = new DataStore(DocumentRepository, this.messageAggregator);
}
