public void Order_Remove_Deletes_Should_Remove_Deleted_OrderDetails()
{
// Arrange
var database = new MockNorthwind();
var order = database.Orders[0];
var deleted1 = order.OrderDetails[0];
var deleted2 = order.OrderDetails[2];
var changeTracker = new ChangeTrackingCollection <Order>(order);
order.OrderDetails.Remove(deleted1);
order.OrderDetails.Remove(deleted2);
changeTracker.RestoreDeletes();
// Act
changeTracker.RemoveRestoredDeletes();
// Assert
Assert.Equal(1, order.OrderDetails.Count);
Assert.DoesNotContain(deleted1, changeTracker.Cast <object>());
Assert.DoesNotContain(deleted2, changeTracker.Cast <object>());
}