add a test to cover addon templates

package.json

@@ -79,6 +79,7 @@
     "ember-resolver": "^8.0.2",
     "ember-source": "~3.28.0",
     "ember-source-channel-url": "^3.0.0",
+    "ember-styleguide": "^5.0.0",
     "ember-template-lint": "^3.6.0",
     "ember-try": "^1.4.0",
     "eslint": "^7.32.0",
@@ -109,6 +110,9 @@
     "main": "lib/ember-addon-main.js",
     "configPath": "tests/dummy/config"
   },
+  "resolutions": {
+    "ember-cli-htmlbars": "link:."
+  },
   "release-it": {
     "plugins": {
       "release-it-lerna-changelog": {

tests/acceptance/styleguide-test.js

@@ -0,0 +1,15 @@
+import { module, test } from 'qunit';
+import { visit, currentURL } from '@ember/test-helpers';
+import { setupApplicationTest } from 'ember-qunit';
+
+module('Acceptance | styleguide', function (hooks) {
+  setupApplicationTest(hooks);
+
+  test('visiting /styleguide', async function (assert) {
+    await visit('/styleguide');
+
+    assert.equal(currentURL(), '/styleguide');
+
+    assert.dom('[data-test-es-note-heading]').containsText('says...');
+  });
+});

tests/dummy/app/router.js

@@ -6,6 +6,8 @@ const Router = EmberRouter.extend({
   rootURL: config.rootURL,
 });
 
-Router.map(function () {});
+Router.map(function () {
+  this.route('styleguide');
+});
 
 export default Router;

tests/dummy/app/templates/styleguide.hbs

@@ -0,0 +1 @@
+<EsNote>You should try out this cool note component</EsNote>