Summary

In this chapter, we explored the fundamentals of unit tests for ASP.NET web API applications. We discussed the use of xUnit as the testing framework and Moq as the mocking framework. We learned how to configure test fixtures with xUnit, and how to manage the test data with the test fixture. We also learned how to write unit tests to test the data access layer and the controller.

Unit tests are a great way to ensure that your code unit is working as expected. These tests often use mock objects to isolate the code unit from its dependencies, but this cannot guarantee that the code unit works well with its dependencies. Therefore, we also need to write integration tests to test if the code units can work together with their dependencies. For example, can the controllers handle the requests correctly?

In the next chapter, we will learn how to write integration tests for ASP.NET web API applications.