Note that you need a recent version of Node because we use new ES6 features. v7.8.0 is definitely OK - earlier v7 versions are probably fine too.

$ (cd runtime && npm install)
$ (cd tracelib && npm install)

$ (cd runtime && npm test)

If there are unhandled promise exceptions without stack traces, use ./node_modules/.bin/mocha --trace-warnings.

$ cd runtime
$ traceFile=`pwd`/trace.json npm test