Maintaining application integrity with tests

Regardless of the development or runtime platform, unit tests are an integral part of the development pipeline. In fact, nowadays, Test-Driven Development (TDD) is the most prominent development methodology and is the choice of any agile development team. In this paradigm, developers are responsible, even before the first line of actual business logic implementation is written, for creating unit tests that are appropriate for the current unit that is under development.

Arrange, Act, and Assert

Without further ado, let's take a look at the first view model in our application and implement some unit tests for it. The products view model is a simple view model that,...