# Unit Testing with MSTest

Unit Testing with MSTest: Unit Testing: an overview, The MSTest Framework, Planning Unit Tests, Adding Test Classes, Writing Tests, Test-Driven Development.

Updated: November 3, 2026

1. [Unit Testing: an overview](https://www.ask-codey.com/lessons/unit-testing-an-overview) (Novice): What a unit test is, and why small classes with clear responsibilities can be tested on their own.
2. [The MSTest Framework](https://www.ask-codey.com/lessons/unit-testing-with-mstest-the-mstest-framework) (Apprentice): MSTest is Microsoft's testing framework for .NET. A test runner finds and runs your tests; a test class holds the tests for one class, in a test project of its own.
3. [Planning Unit Tests](https://www.ask-codey.com/lessons/unit-testing-with-mstest-planning-unit-tests) (Apprentice): Plan tests from the requirements, as a table of scenarios. Each scenario changes one thing, and the edges (at a limit, just inside it, just past it) find the most bugs.
4. [Adding Test Classes](https://www.ask-codey.com/lessons/unit-testing-with-mstest-adding-test-classes) (Apprentice): Add an MSTest test project beside your app, give it a reference to the app, and add a test class for each class you test.
5. [Writing Tests](https://www.ask-codey.com/lessons/unit-testing-with-mstest-writing-tests) (Apprentice): Name each test for its scenario, write it in three parts (Arrange, Act, Assert), check results with MSTest's Assert methods, and run one test for many inputs with DataRow.
6. [Test-Driven Development](https://www.ask-codey.com/lessons/unit-testing-with-mstest-test-driven-development) (Apprentice): In test-driven development you write a failing test first, then just enough code to pass it, then tidy up. Follow three short cycles that build a shipping calculator.

Source: https://www.ask-codey.com/courses/csharp-full-stack-bootcamp/topics/unit-testing-with-mstest