refactor: 💡 model grants as a fragment-array for statefulness

addons/api/tests/unit/models/fragment-string-test.js

@@ -0,0 +1,13 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+
+module('Unit | Model | fragment string', function(hooks) {
+  setupTest(hooks);
+
+  // Replace this with your real tests.
+  test('it exists', function(assert) {
+    let store = this.owner.lookup('service:store');
+    let model = store.createRecord('fragment-string', {});
+    assert.ok(model);
+  });
+});