Gain insights into unit testing principles, and delve into configuring and using NUnit. Discover how to write effective tests, maximize coverage, and elevate your testing projects.

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Industry, employers, startups, and amateur developers are increasingly looking towards unit testing their software. Unit testing is one of the most reliable ways to find and keep software bugs at bay, thus reducing costs and development pains. Developers working with the .NET framework are overwhelmingly turning to NUnit to meet their unit testing needs.

In this course, you’ll learn the principles of unit testing, and in the process, learn to configure and use the NUnit testing framework. Given that the course places an emphasis on principles, these skills are transferable to other unit testing frameworks. Alongside these, you’ll also get hands-on experience with projects and exercises that provide ample opportunities to learn how to design effective tests in the NUnit framework.

At the end of the course, you’ll be able to quickly write unit tests that maximize logical coverage, test complex applications, and better organize your testing projects—setting you up as a natural leader in your organization.

Mastering Unit Testing Principles with NUnit

# Introduction

Every test case requires the Arrange-Act-Assert steps. Most of the time, arranging data is the same between test methods. If this is the case, you will need to set up your test methods. Test method **setup** is the process of arranging data once so it may subsequently be used by various test methods.

# Demonstrating the problem

Suppose you have an application code that contains a class called `HundredMeterSprint`. This class stores a list of sprint competitor times. These values represent the time taken to complete a hundred-meter sprint by various athletes. The class has the three following public methods:
- `AverageTime`**(line 17)**: This returns the average time taken by all participants to complete the sprint.
- `QuickestTime`**(line 25)**: This returns the time taken to complete the sprint by the quickest athlete.
- `LongestTime`**(line 37):** This returns the time taken to complete the sprint by the slowest athlete.

In the test code, we have three test methods that test each of the public `HundredMeterSprint` methods. Run the tests to ensure they all pass.



Learn to reduce test code duplication between your test methods.

Reducing Code Redundancy Between our Test Methods

Reducing Code Redundancy Between our Test Cases

Fundamentals of Unit Testing

Testing Conditions With Classic And Fluent Assertions

Making Unit Testing More Effective

Unit Testing Code with External Dependencies

Conclusion

Appendix - Unit Test Project Organization and Console Setup

Reducing Code Redundancy Between our Test Cases