Introduce new DI container

- Adding Friendica\DI class for getting dynamic classes
- Replacing BaseObject::getApp() with this class

tests/include/ApiTest.php

@@ -15,6 +15,7 @@ use Friendica\Core\Session;
 use Friendica\Core\Session\ISession;
 use Friendica\Core\System;
 use Friendica\Database\Database;
+use Friendica\DI;
 use Friendica\Model\Contact;
 use Friendica\Network\HTTPException;
 use Friendica\Test\Util\Database\StaticDatabase;
@@ -87,7 +88,7 @@ class ApiTest extends DatabaseTest
 		$this->loadFixture(__DIR__ . '/../datasets/api.fixture.php', $dba);
 
 		/** @var App app */
-		$this->app = BaseObject::getApp();
+		$this->app = DI::app();
 
 		$this->app->argc = 1;
 		$this->app->argv = ['home'];

tests/src/BaseObjectTest.php

@@ -1,36 +0,0 @@
-<?php
-/**
- * BaseObjectTest class.
- */
-
-namespace Friendica\Test\src;
-
-use Friendica\BaseObject;
-use Friendica\Test\Util\AppMockTrait;
-use Friendica\Test\Util\VFSTrait;
-use PHPUnit\Framework\TestCase;
-
-/**
- * Tests for the BaseObject class.
- */
-class BaseObjectTest extends TestCase
-{
-	use VFSTrait;
-	use AppMockTrait;
-
-	/**
-	 * @var BaseObject
-	 */
-	private $baseObject;
-
-	/**
-	 * Test the getApp() function without App
-	 * @expectedException Friendica\Network\HTTPException\InternalServerErrorException
-	 * @runInSeparateProcess
-	 * @preserveGlobalState disabled
-	 */
-	public function testGetAppFailed()
-	{
-		BaseObject::getApp();
-	}
-}