Book Image

Modern C++ Programming Cookbook

By : Marius Bancila
Book Image

Modern C++ Programming Cookbook

By: Marius Bancila

Overview of this book

C++ is one of the most widely used programming languages. Fast, efficient, and flexible, it is used to solve many problems. The latest versions of C++ have seen programmers change the way they code, giving up on the old-fashioned C-style programming and adopting modern C++ instead. Beginning with the modern language features, each recipe addresses a specific problem, with a discussion that explains the solution and offers insight into how it works. You will learn major concepts about the core programming language as well as common tasks faced while building a wide variety of software. You will learn about concepts such as concurrency, performance, meta-programming, lambda expressions, regular expressions, testing, and many more in the form of recipes. These recipes will ensure you can make your applications robust and fast. By the end of the book, you will understand the newer aspects of C++11/14/17 and will be able to overcome tasks that are time-consuming or would break your stride while developing.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Asserting with Catch


Unlike other testing frameworks, Catch does not provide a large set of assertion macros. It has two main macros: REQUIRE, which produces a fatal error stopping the execution of the test case upon failure and CHECK, which produces a non-fatal error upon failure, continuing the execution of the test case. Several additional macros are defined; in this recipe, we will see how to put them to work.

Getting ready

You should now be familiar with writing test cases and test functions using Catch, a topic covered in the previous recipe.

How to do it...

The following list contains the available options for asserting with the Catch framework:

  • Use CHECK(expr) to check whether expr evaluates to true, continuing the execution in case of failure, and REQUIRE(expr) to make sure that expr evaluates to true and stop the execution of the test in case of failure:
        int a = 42;
        CHECK(a == 42);
        REQUIRE(a == 42);
  • Use CHECK_FALSE(expr) and REQUIRE_FALSE(expr) to make sure that...