Implementing the specification pattern

In this recipe, we will be implementing a specification pattern on top of Entity Framework and Repository Pattern to leverage maximum reuse without surfacing queryable objects to the consuming developers.

Getting ready

We will be using the NuGet package manager to install the Entity Framework 4.1 assemblies.

The package installer can be found at http://nuget.org.

We will also be using a database for connecting to and updating data.

Open the Improving Complex Query Testing solution in the included source code examples.

How to do it...

Carry out the following steps in order to accomplish this recipe.

  1. We start by writing a test which will query the database with a predefined specification. Use the following code:
    using System; ...

Get Entity Framework 4.1: Expert's Cookbook now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.