The article provides a comprehensive guide on organizing tests in Rust, highlighting the importance of testing to identify and fix bugs before deployment. It covers various testing methodologies, including unit tests, integration tests, and documentation tests, while emphasizing best practices for effective test organization and execution.

The article provides an overview of significant changes and new features introduced in Rust from version 1.78 to 1.90, highlighting the release of the 2024 edition and the establishment of an official language specification. It summarizes various enhancements in language capabilities, standard library updates, and tooling improvements, emphasizing the evolution of Rust over the past year and a half.

The article discusses the author's journey with the programming language Rust and its evolution, highlighting the factors that contributed to its success. It then draws parallels to a new version control system called jj, emphasizing its promising market fit, solid team, and potential user base, similar to what the author observed with Rust.