MSTest is a unit testing framework for the .NET framework, it’s one of the built-in test frameworks in Visual Studio and it’s widely used for unit testing in the .NET ecosystem. In the context of ASP.NET, MSTest can be used to write unit tests for web applications built using the ASP.NET framework. MSTest provides features such as data-driven testing, parallel test execution, and test discovery and execution, it also provides the ability to run tests on multiple frameworks.
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