Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
Book Image

Modern C++ Programming Cookbook - Second Edition

By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
13
Bibliography
14
Other Books You May Enjoy
15
Index

Writing and invoking tests with Catch2

The Catch2 framework enables you to write tests using either the traditional style of test cases and test functions or the BDD style with scenarios and given-when-then sections. Tests are defined as separate sections of a test case and can be nested as deep as you want. Whichever style you prefer, tests are defined with only two base macros. This recipe will show what these macros are and how they work.

How to do it...

To write tests using the traditional style, with test cases and test functions, do this:

  • Use the TEST_CASE macro to define a test case with a name (as a string), and optionally, a list of its associated tags:
    TEST_CASE("test construction", "[create]")
    {
      // define sections here
    }
    
  • Use the SECTION macro to define a test function inside a test case, with the name as a string:
    TEST_CASE("test construction", "[create]")
    {
      SECTION(&quot...