The following official learn.microsoft.com website contains all the information about writing unit tests, unit test frameworks, integration with CLI and Visual Studio.

This blog post announces the vision for MSTest V2.

For API documentation refer to Microsoft Documentation.

• See CONTRIBUTING.md for details about how you can contribute.
• See dev-guide.md for more details on configurations for building the codebase. In practice, you only really need to run build.cmd/build.sh.

You can find detailed examples and explanations of MSTest features at

• Writing your first test with MSTest
• MSTest element via runsettings
• Use the MSTest framework in unit tests
• Create a data-driven unit test
• Run selected unit tests
• Upgrade from MSTestV1 to MSTestV2
• Using a configuration file to define a data source
• MSTest Runner

For technical reasoning and implementation details, you can refer to the list of RFCs:

• Framework Extensibility Trait Attributes
• Framework Extensibility for Custom Assertions
• Customize Running tests
• In-assembly parallel execution
• Framework Extensibility for Custom Test Data Source
• DynamicData Attribute for Data Driven Tests
• DataSource Attribute Vs ITestDataSource
• Test case timeout via runsettings

• Affected-test selection rollout: disabled adoption layout and activation prerequisites.
• Package README guidelines: required content and review checklist for NuGet package pages.
• Testing WinUI apps: packaged (MSIX) vs unpackaged WinUI, and how the test host is started for each.

• MSTest source generator — design: scope, fallback categories, discovery limitations and trim/AOT story for the MSTest.SourceGeneration package.

You can find all features and bugs fixed in all our releases by looking at Changelog.md.