Collectable.js: Core Module
This module provides functionality that is internal to Collectable.js data structures. You do not need to take it as a dependency directly.
For unit testing during development set VSCode to build (CTRL/CMD-SHIFT-B; the task is set to watch/rebuild on changes), then, from your terminal/console in this directory, run one of:
$ npm run test-dev
$ yarn run test-dev
The project will compile, Mocha will run in watch mode and bail when encountering a failing test. Because VSCode is building in watch mode too, making a change will recompile source files, and the compiled outputs will be picked up automatically picked up by Mocha and rerun.
This development testing process is independent of the main Gulp-based build and exists only to make development easier. Build with Gulp after you're satisfied that source code and tests work correctly.