NUnitAsp is a tool for automatically testing ASP.NET web pages. It's an extension to NUnit, a tool for test-driven development in .NET.

NUnitAsp is a class library for use within your NUnit tests. It provides NUnit with the ability to download, parse, and manipulate ASP.NET web pages.

With NUnitASP, your tests don't need to know how ASP.NET renders controls into HTML. Instead, you can rely on the NUnitASP library to do this for you, keeping your test code simple and clean. For example, your tests don't need to know that a DataGrid control renders as an HTML table. You can rely on NUnitASP to handle the details. This gives you the freedom to focus on functionality questions, like whether the DataGrid holds the expected values.

Simply speaking, NUnitAsp makes it very easy to unit test ASP.NET web pages.