feat: Button Base Demo test (#126)

* feat: Button Base Demo test

This test passes locally, however I am running into a glint error and I am not sure how to import.

* test: Button page, replace integration test with acceptance

* docs, test: adding a test for console errors
- installed sinon, sinon-chai and chai for this

* test: Adding a test for the button page

* removed: sinon, chai, sinon-chai and related @types

Lint revealed unused imports, and I realized that I wasn't using sinon
or chai anymore.

These have been removed.

Author: nicolechung

docs-app/package.json

@@ -75,6 +75,7 @@
     "@types/rsvp": "^4.0.4",
     "autoprefixer": "^10.4.12",
     "broccoli-asset-rev": "^3.0.0",
+    "chai": "^4.3.7",
     "concurrently": "^8.0.0",
     "cssnano": "^6.0.0",
     "ember-auto-import": "^2.4.2",

docs-app/tests/acceptance/button-test.gts

@@ -0,0 +1,16 @@
+/* eslint-disable no-undef -- Until https://github.com/ember-cli/eslint-plugin-ember/issues/1747 is resolved... */
+/* eslint-disable simple-import-sort/imports,padding-line-between-statements,decorator-position/decorator-position -- Can't fix these manually, without --fix working in .gts */
+import { module, test } from 'qunit';
+import { visit, currentURL } from '@ember/test-helpers';
+import { setupApplicationTest } from 'ember-qunit';
+
+module('Acceptance | Button', function (hooks) {
+  setupApplicationTest(hooks);
+
+  test('visiting the button page', async function (assert) {
+
+    await visit('/docs/components/button')
+    assert.strictEqual(currentURL(), '/docs/components/button');
+  });
+
+});