Creating the Unit Testing project within the TrackMyWalks solution

During the development of our TrackMyWalks application, we have designed the user interfaces using the XAML markup language, as well as created each of our ViewModels and ContentPages, as well as the required class files for handling the navigation between each of our ViewModels. We also obtained the user's GPS coordinates and handling communication with Microsoft Azure App Services and Twitter using their APIs.

In this section, we will begin by creating a unit testing project for our TrackMyWalks application so that we can run these independently from our TrackMyWalks iOS and Android projects. One of the great benefits of using Visual Studio or Visual Studio for Mac to handle your Unit Tests is that they leverage the popular NUnit testing framework for performing unit tests.

Let's take a look at how we can achieve this by performing the following steps:

1. First, ensure that the TrackMyWalks solution is open within the Visual...