Atom Grammar Testing Framework

atom-grammar-test is a testing framework designed specifically for Atom editor grammar definitions, inspired by Sublime Text's syntax testing format. It allows developers to define grammar fixtures directly within source code comments, visually annotating how grammar rules should parse different code constructs. This enables both programmatic testing and visual inspection of grammar behavior. The current stable version is 0.6.4. Given that the Atom editor has been officially archived and is no longer maintained, this package is effectively abandoned, with no active development or release cadence. Its primary differentiator was its tight integration with the Atom ecosystem and its visual testing approach.