Drupal 8 test module for Amazee labs
Clone amazeetest repository to modules directory .
Install Lexer module (/admin/modules) from Custom modules section.
Add Lexer field to one of content types (/admin/structure/types/manage/article/fields).
Fill in some formula(s).
See results on page view.
Show parsed value in FE.
Add tests.
Rewrite Lexer service.