In this article, we will look at how to test IServiceCollection registrations in .NET. We will test for a service registration and lifetime.

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Unit testing IServiceCollection registrations in .NET is essential for catching errors related to dependency injection setups early in the development cycle. By testing service configurations—such as Singleton, Scoped, and Transient lifetimes—developers can ensure that dependencies are correctly registered and injected, improving code reliability and maintainability. The process involves creating extension methods for service registration and validating them through unit tests, promoting best coding practices and overall application stability.

How to Test IServiceCollection Registrations in .NET

Why Should We Test IServiceCollection Registrations?

IServiceCollection Registrations for Different Lifetimes

Adding Unit Tests for IServiceCollection Registrations