add failling test on inserting Middleware instances

tests/TestCase/Http/MiddlewareQueueTest.php

@@ -17,6 +17,7 @@ namespace Cake\Test\TestCase\Http;
 use Cake\Core\Configure;
 use Cake\Http\MiddlewareQueue;
 use Cake\TestSuite\TestCase;
+use TestApp\Middleware\DumbMiddleware;
 use TestApp\Middleware\SampleMiddleware;
 
 /**
@@ -186,12 +187,14 @@ class MiddlewareQueueTest extends TestCase
         };
         $three = function () {
         };
+        $four = new SampleMiddleware();
 
         $queue = new MiddlewareQueue();
-        $queue->add($one)->add($two)->insertAt(0, $three);
+        $queue->add($one)->add($two)->insertAt(0, $three)->insertAt(2, $four);
         $this->assertSame($three, $queue->get(0));
         $this->assertSame($one, $queue->get(1));
-        $this->assertSame($two, $queue->get(2));
+        $this->assertSame($four, $queue->get(2));
+        $this->assertSame($two, $queue->get(3));
 
         $queue = new MiddlewareQueue();
         $queue->add($one)->add($two)->insertAt(1, $three);
@@ -231,13 +234,15 @@ class MiddlewareQueueTest extends TestCase
         };
         $two = function () {
         };
+        $three = new SampleMiddleWare();
 
         $queue = new MiddlewareQueue();
-        $queue->add($one)->insertAt(-1, $two);
+        $queue->add($one)->insertAt(-1, $two)->insertAt(-1, $three);
 
-        $this->assertCount(2, $queue);
-        $this->assertSame($two, $queue->get(0));
-        $this->assertSame($one, $queue->get(1));
+        $this->assertCount(3, $queue);
+        $this->assertSame($three, $queue->get(0));
+        $this->assertSame($two, $queue->get(1));
+        $this->assertSame($one, $queue->get(2));
     }
 
     /**
@@ -252,13 +257,16 @@ class MiddlewareQueueTest extends TestCase
         $two = new SampleMiddleware();
         $three = function () {
         };
+        $four = new DumbMiddleware();
+        
         $queue = new MiddlewareQueue();
-        $queue->add($one)->add($two)->insertBefore(SampleMiddleware::class, $three);
+        $queue->add($one)->add($two)->insertBefore(SampleMiddleware::class, $three)->insertBefore(SampleMiddleware::class, $four);
 
-        $this->assertCount(3, $queue);
+        $this->assertCount(4, $queue);
         $this->assertSame($one, $queue->get(0));
         $this->assertSame($three, $queue->get(1));
-        $this->assertSame($two, $queue->get(2));
+        $this->assertSame($four, $queue->get(2));
+        $this->assertSame($two, $queue->get(3));
 
         $two = SampleMiddleware::class;
         $queue = new MiddlewareQueue();

tests/test_app/TestApp/Middleware/DumbMiddleware.php

@@ -0,0 +1,25 @@
+<?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         3.3.0
+ * @license       http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace TestApp\Middleware;
+
+/**
+ * Testing stub for middleware tests.
+ */
+class DumbMiddleWare {
+    function __invoke($request, $response, $next)
+    {
+        return $next($request, $response);
+    }
+}