Angular 6 app with multiple projects. How to run all spec files? ng test runs only first project

Question

I'm working on an app which uses multiple projects. As mentioned, only the first project's spec.ts files are executed. It will be much appreciated if I can see a monorepo which has multiple projects, capable of executing all specs, using:

• angular 6
• karma, jasmine
• nrwl/nx 6
• wallaby.js (if possible)

Related to (github):

• #514
• #518
• #529