Book Image

Learn C# Programming

By : Marius Bancila, Raffaele Rialdi, Ankit Sharma
5 (1)
Book Image

Learn C# Programming

5 (1)
By: Marius Bancila, Raffaele Rialdi, Ankit Sharma

Overview of this book

The C# programming language is often developers’ primary choice for creating a wide range of applications for desktop, cloud, and mobile. In nearly two decades of its existence, C# has evolved from a general-purpose, object-oriented language to a multi-paradigm language with impressive features. This book will take you through C# from the ground up in a step-by-step manner. You'll start with the building blocks of C#, which include basic data types, variables, strings, arrays, operators, control statements, and loops. Once comfortable with the basics, you'll then progress to learning object-oriented programming concepts such as classes and structures, objects, interfaces, and abstraction. Generics, functional programming, dynamic, and asynchronous programming are covered in detail. This book also takes you through regular expressions, reflection, memory management, pattern matching, exceptions, and many other advanced topics. As you advance, you'll explore the .NET Core 3 framework and learn how to use the dotnet command-line interface (CLI), consume NuGet packages, develop for Linux, and migrate apps built with .NET Framework. Finally, you'll understand how to run unit tests with the Microsoft unit testing frameworks available in Visual Studio. By the end of this book, you’ll be well-versed with the essentials of the C# language and be ready to start creating apps with it.
Table of Contents (20 chapters)

Writing data-driven unit tests

If you take a second look at the previous tests, such as the TestIntersectsWith() test method, you will see that we tried testing various cases, such as the intersection of one rectangle with several others, some that intersect, and some that don't. This was a simple example, and in practice, there should be many more rectangles that we should test with to cover all of the possible cases of rectangle intersection.

In general, as code evolves, so do the tests and you often have to add more to the testing datasets. Rather than writing explicitly the data in the test method, as in our previous example, you can fetch it from a data source. The test method is then executed once for each row in the data source. The unit testing framework for managed code supports three different scenarios.

Data from attributes

The first option is to provide the data in code but through an attribute called DataRowAttribute. This attribute has a constructor that...