You'll need at least Node 8.

1. npm install to install the dependencies
2. npm start to start the Angular app and the Express server
3. npm test to start Karma running
4. Open localhost:4200 in your browser

Each 'light' on the panel represents a test you need to get running. A green light is a passing test, a red light is a failing test, and and unlit light is a test that doesn't have any expects in it.

Click the panels and follow the instructions to get all the tests working.

If you're wondering how it works, Karma outputs its results to a JSON file. The Express server watches the file, and every time the file is updated, the server notifies the app through the power of Server Sent Events and hacks. The app checks each test result to ensure it has a passing test with at least one expect in it.

Yes, you could just add expect(true).toBe(true) to every test, and light up all the lights. Knock yourself out if you think that's the best use of your time ;-).

I've only written the first couple of sections so far. If people find this helpful (and interesting), I'll carry on with the rest.