If you are using the EF Designer then you’ll need to edit the T4 template that generates your context.
EZ WAY TESTING CODE
If you are using Code First then you can edit your classes directly. This will allow the mocking framework to derive from our context and overriding these properties with a mocked implementation. Note that the DbSet properties on the context are marked as virtual. Virtual DbSet properties with EF Designer This code may have been generated by the EF Designer or be a Code First model. The service we're going to test makes use of an EF model made up of the BloggingContext and the Blog and Post classes. NET Framework 4.5 to complete the sections that use async. It's easiest to create a Unit Test Project and you will need to target. This article gives complete code listings that you can copy into Visual Studio to follow along if you wish. However, when running against a database the data will only be loaded if you use the Include method.įor this reason, it is recommended to always include some level of end-to-end testing (in addition to your unit tests) to ensure your application works correctly against a database.
EZ WAY TESTING SERIES
If you create a series of Blogs that each have related Posts, then when using in-memory data the related Posts will always be loaded for each Blog. One example of such a difference is loading related data. This can result in different behavior than using EF’s LINQ provider (LINQ to Entities) to translate queries into SQL that is run against your database. However, when doing this you are using LINQ to Objects to execute queries against in-memory data. In-memory test doubles can be a good way to provide unit test level coverage of bits of your application that use EF. For testing with EF5 and earlier version see Testing with a Fake Context. The scenario shown in this article is dependent on some changes we made to DbSet in EF6.
EZ WAY TESTING INSTALL
The easiest way to get Moq is to install the Moq package from NuGet. To demonstrate using EF with a mocking framework we are going to use Moq. For creating your own test doubles see Testing with Your Own Test Doubles. This article will deal with using a mocking framework. Use a mocking framework to create test doubles – Using a mocking framework (such as Moq) you can have the in-memory implementations of your context and sets created dynamically at runtime for you.This gives you a lot of control over how the classes behave but can involve writing and owning a reasonable amount of code. Create your own test doubles – This approach involves writing your own in-memory implementation of your context and DbSets.There are two different approaches that can be used to create an in-memory version of your context. Entity Framework allows you to achieve this by creating a context – with behavior defined by your tests – that makes use of in-memory data. When writing tests for your application it is often desirable to avoid hitting the database. If you are using an earlier version, some or all of the information does not apply. discussed in this page were introduced in Entity Framework 6. EF6 Onwards Only - The features, APIs, etc.