Add a test for returned as data

tests/Feature/ActivityStreamTest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Tests\Feature;
+
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+class ActivityStreamTest extends TestCase
+{
+    /**
+     * Test request to homepage returns data for site owner.
+     *
+     * @return void
+     */
+    public function test_homepage_returns_data_for_site_owner()
+    {
+        $response = $this->get('/', ['Accept' => 'application/activity+json']);
+        $response->assertHeader('Content-Type', 'application/activity+json');
+        $response->assertJson([
+            '@context' => 'https://www.w3.org/ns/activitystreams',
+            'id' => config('app.url'),
+            'type' => 'Person',
+            'name' => config('app.display_name'),
+        ]);
+    }
+}