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4106. Test-Driven Development Using Visual Studio and C#

Rev. 4.5


An emerging software engineering paradigm is test-driven development, where tests are written early and testing is performed continuously during the development process. Problems are discovered early and corrected when they are found. This one-day course for developers explains the methodology of test-driven development and the use of the unit testing framework that comes with Visual Studio 2012 Professional Edition and higher. Visual Studio 2012 brings major changes to the unit testing framework, including a pluggable architecture that enables integration with third-party test frameworks. This topic is covered in an appendix.


The course is practical, with many example programs and tests written in C#, including a cumulative case study. The goal is to quickly bring you up to speed in doing unit testing in your .NET development projects. The student will receive a comprehensive set of materials, including course notes and all the programming examples.




         Understand the principles of test-driven development

         Acquire fluency in developing tests using the Visual Studio unit testing framework

         Efficiently exercise test suites using Visual Studio and MSTest

         Integrate third-party unit test frameworks such as NUnit into Visual Studio


Duration: 1 day.


Prerequisites: The student should have a basic knowledge of the .NET Framework and experience programming in C# with Visual Studio.


1.      Test-Driven Development

What Is Test-Driven Development (TDD)?

Functional Tests / Customer Tests

Unit Tests / Programmer Tests

Test Automation

Simple Design


A Visual Studio Test Drive

TDD with Legacy Code


2.      Visual Studio Unit Testing Fundamentals

Structure of Unit Tests

Unit Testing Framework


Test Cases

Test Classes

Test Runners

Ignoring Tests

Initialization and Cleanup


3.      More about Unit Testing Framework

Expected Exceptions

Custom Asserts

Debugging Unit Tests




Appendix A. Third-Party Unit Test Frameworks

Integrating Third-Party Unit Test Frameworks into Visual Studio

NUnit Test Adapter

Running NUnit Tests within Visual Studio



System Requirements


Course exercises require Visual Studio 2012 Professional or higher and a Windows 7 SP1 operating system, or more recent.


A good minimal hardware profile for this course would have a 1.8 GHz or equivalent CPU, 2 GB of RAM, and at least 10 GB of free disk space for tools installation and courseware.