How to create unit tests for Entity Framework?

How to create unit tests for Entity Framework?

This guidance and application demonstrate how to create unit tests for your Web API 2 application that uses the Entity Framework. It shows how to modify the scaffolded controller to enable passing a context object for testing, and how to create test objects that work with Entity Framework.

How to test Entity Framework in web API 2?

IHttpActionResult is one of the new features in Web API 2, and it simplifies unit test development. In the next section, you will customize the generated code to facilitate passing test objects to the controller. Currently, the ProductController class is hard-coded to use an instance of the StoreAppContext class.

How to test Entity Framework dbcontext in isolation?

Having this, in our tests we can use stubs or mocks as implementations of the IRepository interface, and we can test the caller code in isolation. The code snippet below shows such a test which verifies that the where clause filters out data.

Is it easy to use Entity Framework Core?

In this respect, Entity Framework Core is refined, and unit testing using it does not differ significantly from any other unit tests. Working with them is easy and fun, which is exactly as it should be. All code mentioned here is available on my GitHub, feel free to take a look at how EF Core can be used in other parts of the project.

How to create ASP.NET Web API unit test?

In the New ASP.NET Project windows, select the Empty template and add folders and core references for Web API. Select the Add unit tests option. The unit test project is automatically named StoreApp.Tests. You can keep this name.

When to write unit tests in Microsoft Docs?

Timely. A unit test should not take a disproportionately long time to write compared to the code being tested. If you find testing the code taking a large amount of time compared to writing the code, consider a design that is more testable.

How is a UI test different from a unit test?

That said, let us explore the UI test. In the test pyramid, the UI test stands at the top because it’s the type of test you write after all modules and components have been integrated. Unlike the unit test or integration test, a UI test isn’t limited to a module or a unit of your application; it tests your application as a whole.