GTest
GTest (Google Test) is a C++ testing framework developed by Google for writing and running unit tests. It provides a rich set of assertions, test discovery, and test fixtures to support test-driven development and behavior-driven development in C++ projects. The framework is widely used for automated testing to ensure code reliability and facilitate refactoring.
Developers should learn GTest when working on C++ projects that require robust unit testing to catch bugs early and maintain code quality, especially in large-scale or critical systems like embedded software, game engines, or high-performance applications. It is particularly valuable in environments that adopt test-driven development (TDD) or continuous integration (CI) pipelines, as it integrates well with build systems like CMake and CI tools.