This summary provides an overview of testing ASP.NET Core Minimal APIs. It covers the basics of testing a "hello world" endpoint, testing a more complex API that returns JSON data, and customizing the ASP.NET Core service collection for unit tests and integration tests. The article walks through creating a test project, updating the test project to include the necessary packages and classes, implementing the Minimal API, and writing tests to validate the API's behavior. The summary also highlights the importance of customizing the service collection with custom services for tests.