Specify the feature for creating a blog post

We set up the entire acceptance test at once. This test will guide us through the rest of the unit testing and implementation of the feature.

Red: UnrecognizedURLError: /posts/new

tests/acceptance/creating-a-blog-post-test.js

@@ -1,13 +1,21 @@
 import { module, test } from 'qunit';
-import { visit, currentURL } from '@ember/test-helpers';
+import { visit, fillIn, click, currentRouteName } from '@ember/test-helpers';
 import { setupApplicationTest } from 'ember-qunit';
+import setupMirage from 'ember-cli-mirage/test-support/setup-mirage';
 
 module('Acceptance | creating a blog post', function(hooks) {
   setupApplicationTest(hooks);
+  setupMirage(hooks);
 
-  test('visiting /creating-a-blog-post', async function(assert) {
-    await visit('/creating-a-blog-post');
+  test('creating a blog post', async function(assert) {
+    await visit('/posts/new');
 
-    assert.equal(currentURL(), '/creating-a-blog-post');
+    await fillIn('.js-post-form-title', 'Test Post');
+    await fillIn('.js-post-form-body', 'This post is a test!');
+    await click('.js-post-form-save');
+
+    assert.equal(currentRouteName(), 'posts.show');
+    assert.dom('.js-post-detail-title').hasText('Test Post');
+    assert.dom('.js-post-detail-body').hasText('This post is a test!');
   });
 });