CppCon 2024

Unit testing is a crucial practice for ensuring software safety. However, boundary cases, particularly those involving error handling and failure-tolerant logic, can be challenging to test in real-world applications. When writing test cases, the caller side of a target function may lack the necessary information to determine why an error occurred. Additionally, existing unit testing frameworks often cannot identify which path is exercised when multiple paths can produce similar outputs. These challenges are also present during fuzzing.

This talk introduces a lightweight, header-only C++11 library designed to address these issues. By including a single header file, users gain access to an integrated framework that combines assertion, logging, unit testing, and fuzzing, offering a more cohesive solution than using separate frameworks.

Attendees will learn about the design and unique features of this library, including:

* **Integrated Assertion and Logging**: The library's assertion/logging macros allow unit tests to be aware of assertion failures and logged data, incorporating this information into the test reports.
* **Structured Logging**: Developers can log structured data and access it during unit tests, making it easier to diagnose issues when errors occur.
* **Fuzzing API**: With a simple, structure-aware fuzzing API and support for Clang and libFuzzer, users can quickly run fuzzing tests within their unit testing framework, utilizing all the aforementioned features.

By the end of the talk, the audience will leave an understanding of how this library enhances the ease of writing unit tests and improves the overall safety of C++ applications.