The **normalize‑parser‑test** package provides a single Node.js utility function that takes a valid ES6 source file and rewrites it so that all identifiers and constant literals are replaced with generic placeholders while preserving whitespace, comments, and more complex literals. It’s aimed at developers writing parser test suites—especially those working with Shift‑style ASTs—who need a deterministic, uniform representation of code snippets for snapshot testing or comparison.