Move integration tests to separate directory

Again, we do all of this to prepare for creating "real" test suites for
each type of tests.

tests/integration/api/Controller/CreateDiscussionControllerTest.php

@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Tests\integration\api\Controller;
+
+use Flarum\Api\Controller\CreateDiscussionController;
+use Flarum\Discussion\Discussion;
+use Flarum\Post\Post;
+use Illuminate\Support\Arr;
+
+class CreateDiscussionControllerTest extends ApiControllerTestCase
+{
+    protected $controller = CreateDiscussionController::class;
+
+    protected $data = [
+        'title' => 'test - too-obscure',
+        'content' => 'predetermined content for automated testing - too-obscure'
+    ];
+
+    /**
+     * @test
+     */
+    public function can_create_discussion()
+    {
+        $this->actor = $this->getAdminUser();
+
+        $response = $this->callWith($this->data);
+
+        $this->assertEquals(201, $response->getStatusCode());
+
+        /** @var Discussion $discussion */
+        $discussion = Discussion::where('title', $this->data['title'])->firstOrFail();
+        $data = json_decode($response->getBody()->getContents(), true);
+
+        $this->assertEquals($this->data['title'], $discussion->title);
+        $this->assertEquals($this->data['title'], array_get($data, 'data.attributes.title'));
+    }
+
+    /**
+     * @test
+     * @expectedException \Illuminate\Validation\ValidationException
+     * @expectedExceptionMessage The given data was invalid.
+     */
+    public function cannot_create_discussion_without_content()
+    {
+        $this->actor = $this->getAdminUser();
+
+        $data = Arr::except($this->data, 'content');
+
+        $this->callWith($data);
+    }
+
+    /**
+     * @test
+     * @expectedException \Illuminate\Validation\ValidationException
+     * @expectedExceptionMessage The given data was invalid.
+     */
+    public function cannot_create_discussion_without_title()
+    {
+        $this->actor = $this->getAdminUser();
+
+        $data = Arr::except($this->data, 'title');
+
+        $this->callWith($data);
+    }
+
+    public function tearDown()
+    {
+        Discussion::where('title', $this->data['title'])->delete();
+        // Prevent floodgate from kicking in.
+        Post::where('user_id', $this->getAdminUser()->id)->delete();
+        parent::tearDown();
+    }
+}