add some tests for check BC in old Cake\Network class

tests/TestCase/Network/MoveToHttpTest.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @since         3.4.3
+ * @license       http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Cake\Test\TestCase\Network;
+
+use Cake\Http\Response as HttpResponse;
+use Cake\Http\ServerRequest as HttpRequest;
+use Cake\Network\Request as NetworkRequest;
+use Cake\Network\Response as NetworkResponse;
+use Cake\TestSuite\TestCase;
+
+/**
+ * ensure that backwards compatibility was ensured for old Cake\Network\* classes
+ */
+class MoveToHttpTest extends TestCase
+{
+    /**
+     * Tests the Cake\Http\Response loaded from Cake\Network\Response correctly
+     *
+     * @return void
+     */
+    public function testResponse()
+    {
+        $response = new NetworkResponse();
+        $this->assertInstanceOf('Cake\Http\Response', $response);
+        $this->assertInstanceOf('Cake\Network\Response', $response);
+
+        $response = new HttpResponse();
+        $this->assertInstanceOf('Cake\Http\Response', $response);
+        $this->assertInstanceOf('Cake\Network\Response', $response);
+    }
+    /**
+     * Tests the Cake\Http\ServerRequest loaded from Cake\Network\Request correctly
+     *
+     * @return void
+     */
+
+    public function testRequest()
+    {
+        $request = new NetworkRequest();
+        $this->assertInstanceOf('Cake\Http\ServerRequest', $request);
+        $this->assertInstanceOf('Cake\Network\Request', $request);
+
+        $request = new HttpRequest();
+        $this->assertInstanceOf('Cake\Http\ServerRequest', $request);
+        $this->assertInstanceOf('Cake\Network\Request', $request);
+    }
+}