public void AddCollectionChangedItem_Prevents_Unneccessary_Changes(CollectionChangeType changeType)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
var oppositeChangeType = changeType == CollectionChangeType.Added ? CollectionChangeType.Removed : CollectionChangeType.Added;
var statisticValue = new ArtistStatisticValues();
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", statisticValue, changeType));
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", statisticValue, oppositeChangeType));
// assert
Assert.False(propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
public void AddCollectionChangedItem_Adds_ChangedItem(CollectionChangeType changeType)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", null, changeType));
// assert
Assert.True(propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
public void AddCollectionChangedItem_Does_Nothing_When_Tracking_Is_Disabled(bool disableChangeTracking)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity)
{
DisableChangeTracking = disableChangeTracking
};
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", null, CollectionChangeType.Added));
// assert
Assert.Equal(!disableChangeTracking, propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
