writing-mstest-tests

SKILL.md

Writing MSTest Tests

Help users write effective, modern unit tests with MSTest 3.x/4.x using current APIs and best practices.

When to Use

User wants to write new MSTest unit tests

User wants to improve or modernize existing MSTest tests by implementing concrete fixes

User asks about MSTest assertion APIs, data-driven patterns, or test lifecycle

User asks to replace Assert.IsTrue with more specific assertions (collections, nulls, types, comparisons)

User asks to replace hard casts with type-checking assertions in tests

User needs help fixing a specific MSTest test bug or failing assertion

User asks to fix swapped Assert.AreEqual argument order (expected first, actual second)

User asks to convert DynamicData from IEnumerable<object[]> to ValueTuple-based data

When Not to Use