csharp-mstest

Modern unit testing with MSTest 3.x/4.x using current APIs and best practices. Your goal is to help me write effective unit tests with modern MSTest, using current APIs and best practices. MSTest provides three assertion classes: Assert , StringAssert , and CollectionAssert . Note: Prefer Assert class equivalents when available (e.g., Assert.Contains("expected", actual) over StringAssert.Contains(actual, "expected") ). Note: Prefer Assert class equivalents when available (e.g., Assert.Contains ). The data source can return any of the following types: Note: When creating new test data methods, prefer ValueTuple or TestDataRow over IEnumerable . The object[] approach provides no compile-time type checking and can lead to runtime errors from type mismatches. The TestContext class provides test run information, cancellation support, and output methods.