What is Atom Grammar Test? It is in Core Packages but it’s not by Atom. It’s by kevinastone but the package link is broken. I found its GitHub repository. I don’t understand what the package does. I don’t remember installing it. I only just installed Atom shell commands. It is fresh install of Atom on macOS Sierra.
atom-grammar-test is not a Core Atom package. The latest list of Core Atom packages (as of this writing) can be found here:
From the atom-grammar-test
Atom Grammar Test is a testing framework for Atom Grammar definitions inspired by the Syntax Testing format for Sublime Text 3. It allows you to define grammar fixtures for testing your grammar rules. Because the fixtures match the source code format, they can be both programmatically tested as well as visually inspected for easily development.