Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
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)
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Asserting with Boost.Test

A test case contains one or more tests. The Boost.Test library provides a series of APIs in the form of macros to write tests. In the previous recipe, you learned a bit about the BOOST_TEST macro, which is the most important and widely used macro of the library. In this recipe, we will discuss how the BOOST_TEST macro can be used in further detail.

Getting ready

You should now be familiar with writing test suites and test cases, a topic we covered in the previous recipe.

How to do it...

The following list shows some of the most commonly used APIs for performing tests:

  • BOOST_TEST, in its plain form, is used for most tests:
    int a = 2, b = 4;
    BOOST_TEST(a == b);
    BOOST_TEST(4.201 == 4.200);
    std::string s1{ "sample" };
    std::string s2{ "text" };
    BOOST_TEST(s1 == s2, "not equal");
  • BOOST_TEST, along with the tolerance() manipulator, is used to indicate the tolerance of floating-point...