public void Existing_Parent_With_Added_Children_Should_Have_Children_Marked_As_Added()
{
// Arrange
var database = new MockNorthwind();
var order = database.Orders[0];
var changeTracker = new ChangeTrackingCollection<Order>(order);
var orderDetails = (IList<OrderDetail>)changeTracker[0].OrderDetails;
var addedDetail1 = new OrderDetail
{
ProductId = 1,
Product = database.Products[0],
Quantity = 10,
UnitPrice = 20M
};
var addedDetail2 = new OrderDetail
{
ProductId = 2,
Product = database.Products[1],
Quantity = 20,
UnitPrice = 30M
};
// Act
orderDetails.Add(addedDetail1);
orderDetails.Add(addedDetail2);
// Assert
Assert.Equal(TrackingState.Added, addedDetail1.TrackingState);
Assert.Equal(TrackingState.Added, addedDetail2.TrackingState);
}
public void Existing_Parent_With_Children_Should_Have_Children_Marked()
{
// Arrange
var database = new MockNorthwind();
var order = database.Orders[0];
var changeTracker = new ChangeTrackingCollection<Order>(order);
var orderDetails = (IList<OrderDetail>)changeTracker[0].OrderDetails;
var addedDetail = new OrderDetail
{
ProductId = 1,
Product = database.Products[0],
Quantity = 10,
UnitPrice = 20M
};
var modifiedDetail = orderDetails[0];
var deletedDetail = orderDetails[1];
addedDetail.Order = order;
modifiedDetail.Order = order;
deletedDetail.Order = order;
// Act
modifiedDetail.UnitPrice++;
orderDetails.Remove(deletedDetail);
orderDetails.Add(addedDetail);
// Assert
Assert.Equal(TrackingState.Added, addedDetail.TrackingState);
Assert.Equal(TrackingState.Modified, modifiedDetail.TrackingState);
Assert.Equal(TrackingState.Deleted, deletedDetail.TrackingState);
}
public void MergeChanges_Should_Merge_Updates_For_Unchanged_Order_With_Changed_OrderDetails()
{
// Arrange
var database = new MockNorthwind();
var origOrder = database.Orders[0];
var product = database.Products.Single(p => p.ProductId == 14);
origOrder.OrderDetails.Add(new OrderDetail { ProductId = 14, OrderId = 10249, Quantity = 9, UnitPrice = 18.6000M, Product = product });
var unchangedDetail = origOrder.OrderDetails[0];
var modifiedDetail = origOrder.OrderDetails[1];
var deletedDetail = origOrder.OrderDetails[3];
var changeTracker = new ChangeTrackingCollection<Order>(origOrder);
origOrder.OrderDetails[1].Product.ProductName = "xxx";
origOrder.OrderDetails[2].Quantity++;
origOrder.OrderDetails[2].ProductId = 1;
var newUnitPrice = origOrder.OrderDetails[2].UnitPrice + 1;
origOrder.OrderDetails.RemoveAt(3);
var addedDetail = new OrderDetail {ProductId = 51, OrderId = 10249, Quantity = 40, UnitPrice = 42.4000M};
origOrder.OrderDetails.Add(addedDetail);
var changes = changeTracker.GetChanges();
var updatedOrder = UpdateOrdersWithDetails(database, changes)[0];
// Act
changeTracker.MergeChanges(updatedOrder);
// Assert
Assert.Contains(unchangedDetail, origOrder.OrderDetails); // Unchanged present
Assert.Equal("xxx", origOrder.OrderDetails[1].Product.ProductName); // Prod name updated
Assert.Equal(updatedOrder.OrderDetails[1].ProductId, origOrder.OrderDetails[2].Product.ProductId); // Changed Product set
Assert.Equal(newUnitPrice, origOrder.OrderDetails[2].UnitPrice); // Db-generated value set
Assert.Equal(updatedOrder.OrderDetails[2].Product.ProductId, origOrder.OrderDetails[3].Product.ProductId); // Added detail Product set
Assert.True(origOrder.OrderDetails.All(d => d.TrackingState == TrackingState.Unchanged)); // Details unchanged
Assert.Same(addedDetail, origOrder.OrderDetails.Single(d => d.ProductId == 51)); // Ref equality
Assert.Same(modifiedDetail, origOrder.OrderDetails.Single(d => d.ProductId == 42)); // Ref equality
Assert.DoesNotContain(deletedDetail, origOrder.OrderDetails); // Detail deleted
ICollection cachedDeletes = ((ITrackingCollection)origOrder.OrderDetails).GetChanges(true);
Assert.Empty(cachedDeletes); // Cached deletes have been removed
}
public void GetChanges_On_Deleted_Order_With_Details_Should_Return_Marked_Children_Deleted()
{
// NOTE: Removed order with added detail should exclude added detail
// Removed order with deleted detail should include deleted detail
// Arrange
var database = new MockNorthwind();
var order = database.Orders[0];
var changeTracker = new ChangeTrackingCollection<Order>(order);
var orderDetails = (IList<OrderDetail>)changeTracker[0].OrderDetails;
var unchangedDetail = orderDetails[0];
var modifiedDetail = orderDetails[1];
var deletedDetail = orderDetails[2];
var addedDetail = new OrderDetail
{
ProductId = 1,
Product = database.Products[0],
Quantity = 10,
UnitPrice = 20M
};
orderDetails.Add(addedDetail);
modifiedDetail.UnitPrice++;
orderDetails.Remove(deletedDetail);
changeTracker.Remove(order);
// Act
var changes = changeTracker.GetChanges();
// Assert
var changedOrder = changes.First();
var changedExistingDetail = changedOrder.OrderDetails.SingleOrDefault(d => d.ProductId == unchangedDetail.ProductId);
var changedModifiedDetail = changedOrder.OrderDetails.SingleOrDefault(d => d.ProductId == modifiedDetail.ProductId);
var changedAddedDetail = changedOrder.OrderDetails.SingleOrDefault(d => d.ProductId == addedDetail.ProductId);
var changedDeletedDetail = changedOrder.OrderDetails.SingleOrDefault(d => d.ProductId == deletedDetail.ProductId);
Assert.Equal(TrackingState.Deleted, changedOrder.TrackingState);
Assert.Equal(3, changedOrder.OrderDetails.Count);
Assert.Equal(TrackingState.Deleted, changedModifiedDetail.TrackingState);
Assert.Equal(TrackingState.Deleted, changedExistingDetail.TrackingState);
Assert.Equal(TrackingState.Deleted, changedDeletedDetail.TrackingState);
Assert.Null(changedAddedDetail);
Assert.Equal(TrackingState.Unchanged, addedDetail.TrackingState);
}
public void GetChanges_On_Added_Order_With_Details_Should_Return_Marked_Children_Added()
{
// Arrange
var database = new MockNorthwind();
var order = database.Orders[0];
var changeTracker = new ChangeTrackingCollection<Order>(true) {order};
var orderDetails = (IList<OrderDetail>)changeTracker[0].OrderDetails;
var unchangedDetail = orderDetails[0];
var modifiedDetail = orderDetails[1];
var deletedDetail = orderDetails[2];
var addedDetail = new OrderDetail
{
ProductId = 1,
Product = database.Products[0],
Quantity = 10,
UnitPrice = 20M
};
orderDetails.Add(addedDetail);
modifiedDetail.UnitPrice++;
orderDetails.Remove(deletedDetail);
// Act
var changes = changeTracker.GetChanges();
// Assert
var changedOrder = changes.First();
var changedExistingDetail = changedOrder.OrderDetails.Single(d => d.ProductId == unchangedDetail.ProductId);
var changedModifiedDetail = changedOrder.OrderDetails.Single(d => d.ProductId == modifiedDetail.ProductId);
var changedAddedDetail = changedOrder.OrderDetails.Single(d => d.ProductId == addedDetail.ProductId);
Assert.Equal(TrackingState.Added, changedOrder.TrackingState);
Assert.Equal(3, changedOrder.OrderDetails.Count);
Assert.Equal(TrackingState.Added, changedModifiedDetail.TrackingState);
Assert.Equal(TrackingState.Added, changedAddedDetail.TrackingState);
Assert.Equal(TrackingState.Added, changedExistingDetail.TrackingState);
Assert.DoesNotContain(deletedDetail, changedOrder.OrderDetails);
}
public void GetChanges_On_Unchanged_Order_With_Details_Should_Return_Marked_Children()
{
// Arrange
var database = new MockNorthwind();
var order = database.Orders[0];
var order3 = database.Orders[3];
var changeTracker = new ChangeTrackingCollection<Order>(order, order3);
order3.OrderDate += new System.TimeSpan(1, 0, 0, 0); // + one day
order3.Customer.CustomerName += " (test)";
var orderDetails = (IList<OrderDetail>)changeTracker[0].OrderDetails;
var unchangedDetail = orderDetails[0];
var modifiedDetail = orderDetails[1];
var deletedDetail = orderDetails[2];
var addedDetail = new OrderDetail
{
ProductId = 1,
Product = database.Products[0],
Quantity = 10,
UnitPrice = 20M
};
orderDetails.Add(addedDetail);
modifiedDetail.UnitPrice++;
orderDetails.Remove(deletedDetail);
// Act
var changes = changeTracker.GetChanges();
// Assert
var changedOrder = changes.First();
var changedOrder3 = changes[1];
var changedModifiedDetail = changedOrder.OrderDetails.Single(d => d.ProductId == modifiedDetail.ProductId);
var changedAddedDetail = changedOrder.OrderDetails.Single(d => d.ProductId == addedDetail.ProductId);
var changedDeletedDetail = changedOrder.OrderDetails.Single(d => d.ProductId == deletedDetail.ProductId);
Assert.Equal(TrackingState.Unchanged, changedOrder.TrackingState);
Assert.Equal(3, changedOrder.OrderDetails.Count);
Assert.Equal(TrackingState.Modified, changedModifiedDetail.TrackingState);
Assert.Equal(TrackingState.Added, changedAddedDetail.TrackingState);
Assert.Equal(TrackingState.Deleted, changedDeletedDetail.TrackingState);
Assert.DoesNotContain(unchangedDetail, changedOrder.OrderDetails);
Assert.NotNull(order.Customer);
Assert.NotNull(order3.Customer);
Assert.NotNull(changedOrder.Customer);
Assert.NotNull(changedOrder3.Customer);
Assert.True(object.ReferenceEquals(order.Customer, order3.Customer));
Assert.False(object.ReferenceEquals(order.Customer, changedOrder.Customer));
Assert.True(object.ReferenceEquals(changedOrder.Customer, changedOrder3.Customer));
}