Description

Description

This two-day, instructor-led course teaches developers how to write, organize, and run high-quality unit tests using Visual Studio 2022 and popular .NET testing frameworks such as MSTest, NUnit, and xUnit. It also introduces powerful practices like Test-Driven Development (TDD) and explores how modern unit testing integrates with the development lifecycle for cleaner, more reliable code.

The course is rich in hands-on labs, real-world use cases, and productivity tools like Live Unit Testing, IntelliTest, and third-party libraries such as moq and NCrunch. Participants will learn practical strategies for testing hard-to-reach code, isolating dependencies, and ensuring coverage without falling into the trap of treating coverage as a goal.

Training Objectives

• Learn to write effective
• maintainable unit tests with MSTest
• NUnit
• and xUnit
• Understand the principles and value of Test-Driven Development (TDD)
• Gain hands-on experience with Visual Studio tools: Test Explorer
• Live Unit Testing
• CodeLens
• and IntelliTest
• Refactor legacy code safely using test scaffolding
• Test “difficult” code using mocking frameworks and Microsoft Fakes
• Manage and organize large test suites with grouping
• filtering
• and playlists
• Understand best practices for code coverage
• parameterized testing
• and exception handling
• Practice writing clean
• well-structured tests that cover edge cases and boundary conditions

Course Outline

• Module 1: Unit Testing in .NET<br />
• What unit tests are—and are not<
• Why unit tests matter in modern development<
• Overview of .NET testing frameworks: MSTest, NUnit, xUnit<
• Writing and running your first unit tests<
• Understanding the 3A pattern: Arrange, Act, Assert<
• Module 2: Unit Testing in Visual Studio<br />
• Creating test projects in Visual Studio<
• Using Test Explorer and other testing tools<
• Grouping, filtering, and organizing tests<
• Running and managing test results<
• Setting up continuous testing and .runsettings files<
• Module 3: Test-Driven Development (TDD)<br />
• The TDD cycle: Red, Green, Refactor<
• Business benefits and practical applications of TDD<
• Writing tests before code<
• Refactoring and working with legacy code<
• Leveraging CodeLens for insight<
• Module 4: Writing High-Quality Unit Tests<br />
• Beyond the happy path: testing sad and evil paths<
• Right-BICEP framework for robust testing<
• Exception handling in unit tests<
• Naming conventions and test organization strategies<
• Maintaining test readability and maintainability<
• Module 5: Leveraging Visual Studio for Advanced Testing<br />
• Analyzing code coverage: what it is and isn’t<
• Writing parameterized tests with DataRow, DynamicData, and DataSource<
• Live Unit Testing in Visual Studio<
• Using NCrunch for concurrent testing and performance feedback<
• Module 6: Testing Difficult Code<br />
• Understanding test doubles: dummies, fakes, stubs, and mocks<
• Isolating code under test from runtime dependencies<
• Using Microsoft Fakes (stubs and shims)<
• Comparing and using mocking frameworks: moq, NSubstitute, etc.<
• Debugging and profiling test code<
• Generating unit tests with IntelliTest<
• Tools Covered<br />
• Visual Studio 2022<
• MSTest, NUnit, xUnit<
• Microsoft Fakes<
• moq (and other mocking libraries)<
• NCrunch<
• IntelliTest<
• CodeLens<
• Test Explorer<
• .runsettings configuration