I have installed the jjabrams ESA and wanted to get that in place before actually wiring it up to my OAuth based backend. With the use of the demo-app it wasn’t too hard but I am getting two extraneous errors in my unit tests that appear to map back to ESA, they’re both similar code blocks:

application-route-mixin.js

_mapSessionEventsToActions: Ember.on('init', function() {
    Ember.A([
      ['authenticationSucceeded', 'sessionAuthenticated'],
      ['invalidationSucceeded', 'sessionInvalidated']
    ]).forEach(([event, method]) => {
      this.get('session').on(event, Ember.run.bind(this, () => {
        this[method](...arguments);
      }));
    });
  }),

addon/services/session.js

_forwardSessionEvents: on('init', function() {
  Ember.A([
    'authenticationSucceeded',
    'invalidationSucceeded'
  ]).forEach((event) => {
    this.get('session').on(event, () => {
      this.trigger(event, ...arguments);
    });
  });
}),

In both cases, the this.get('session') seems to resolve to an undefined object. In a project with 200 or so unit tests I only get one failure for each. The first one comes from the route/application.js where I’ve mixed in the ApplicationRouteMixin just like your demo-app. The other one is a bit more bizarre considering the error comes from a “it renders” test of a Component which does not inject the session service.