I FUCKING DID IT

Added a helper component for managing a list of strings.
This component could, in theory, also be turned into a generic one
for any type of data

frontend-reactive/tests/unit/services/auth-test.ts

@@ -0,0 +1,12 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'frontend-reactive/tests/helpers';
+
+module('Unit | Service | auth', function (hooks) {
+  setupTest(hooks);
+
+  // TODO: Replace this with your real tests.
+  test('it exists', function (assert) {
+    const service = this.owner.lookup('service:auth');
+    assert.ok(service);
+  });
+});