.NET RIA Services links

One of the common tasks that .NET RIA Services developers have to undertake is testing their mid tier business logic code. Mid tier code typically uses a data access layer (DAL) like Linq to SQL or Linq to Entities for persisting data. However directly coupling the business logic code to the DAL will pose challenges for unit testing and causes tests to depend on the database. One possible solution to avoid this problem is to adopt the repository pattern and write business logic code to go against repository.

The following steps demonstrates an implementation of a domain service class using a repository to make it unit testing friendly. The example code uses the .NET RIA services walkthrough application as its starting point and is modified to use Linq To SQL as DAL.

( Unit Testing Business Logic in .NET RIA Services: http://blogs.msdn.com/vijayu/archive/2009/06/08/unit-testing-business-logic-in-net-ria-services.aspx )

Microsoft .NET RIA Services simplifies the traditional n-tier application pattern by bringing together the ASP.NET and Silverlight platforms. RIA Services provides a pattern to write application logic that runs on the mid-tier and controls access to data for queries, changes and custom operations. It also provides end-to-end support for common tasks such as data validation, authentication and roles by integrating with Silverlight components on the client and ASP.NET on the mid-tier.