Assert that zend-servicemanager is a PSR-11 container

Author: weierophinney

composer.json

@@ -15,7 +15,8 @@
     },
     "require": {
         "php": "^5.6 || ^7.0",
-        "container-interop/container-interop": "~1.0",
+        "container-interop/container-interop": "^1.2",
+        "psr/container": "^1.0",
         "zendframework/zend-stdlib": "^3.1"
     },
     "require-dev": {

test/ServiceManagerTest.php

@@ -9,6 +9,7 @@
 
 use DateTime;
 use PHPUnit\Framework\TestCase;
+use Psr\Container\ContainerInterface;
 use stdClass;
 use Zend\ServiceManager\Factory\FactoryInterface;
 use Zend\ServiceManager\Factory\InvokableFactory;
@@ -29,6 +30,12 @@ public function createContainer(array $config = [])
         return $this->creationContext;
     }
 
+    public function testServiceManagerIsAPsr11Container()
+    {
+        $container = $this->createContainer();
+        $this->assertInstanceOf(ContainerInterface::class, $container);
+    }
+
     public function testConfigurationCanBeMerged()
     {
         $serviceManager = new SimpleServiceManager([