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

Test methods often require testing the same behavior but with different inputs. NUnit supports **parameterized tests** to test the same behavior with a diverse array of input/output pairs. If a group of test cases is common enough, parameterization reduces the number of test methods. This reduces the developer’s workload.

# Parameterizing tests

Suppose we have an application code that returns the type of triangle depending on triangle lengths. The `Triangle` class has a simple constructor and exposes the `GetTriangleType` method (**line** **21**) to return the type of triangle. This code is shown below. Run the test cases to ensure all tests pass:

Learn how to reduce test code redundancy within each test method.

Reducing Code Redundancy Within 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 Within Test Cases

Introduction

Parameterizing tests