The book uses two projects:

Builds pieces of a simple blockchain, transaction management system. You can run all tests:

npm run test-all

This project contains code for each code listing by name. This project depends on building the blockchain project. If you haven't done so, please run:

npm run build

for the blockchain project before running all tests in chapter-listings

You can run all tests:

npm run test-all

You can run each file individually, but you must first use Babel to transpile the file. Then you can use mocha to execute the test.