Add return statement to Illuminate::resetManager() (#250)

Update related tests to check that behavior

Author: adridev

src/IlluminateRegistry.php

@@ -280,6 +280,8 @@ public function resetManager($name = null)
 
         unset($this->managersMap[$name]);
         unset($this->connectionsMap[$name]);
+
+        return $this->getManager($name);
     }
 
     /**

tests/IlluminateRegistryTest.php

@@ -277,8 +277,14 @@ public function test_can_reset_default_manager()
         $this->registry->addManager('default');
 
         $this->container->shouldReceive('forgetInstance', 'doctrine.managers.default');
+        $this->container->shouldReceive('make')
+            ->with('doctrine.managers.default')
+            ->andReturn(m::mock(\Doctrine\Common\Persistence\ObjectManager::class));
 
-        $this->registry->resetManager();
+        $manager = $this->registry->resetManager();
+
+        $this->assertInstanceOf(\Doctrine\Common\Persistence\ObjectManager::class, $manager);
+        $this->assertSame($manager, $this->registry->getManager());
     }
 
     public function test_can_reset_custom_manager()
@@ -287,8 +293,14 @@ public function test_can_reset_custom_manager()
         $this->registry->addManager('custom');
 
         $this->container->shouldReceive('forgetInstance', 'doctrine.managers.custom');
+        $this->container->shouldReceive('make')
+            ->with('doctrine.managers.custom')
+            ->andReturn(m::mock(\Doctrine\Common\Persistence\ObjectManager::class));
+
+        $manager = $this->registry->resetManager('custom');
 
-        $this->registry->resetManager('custom');
+        $this->assertInstanceOf(\Doctrine\Common\Persistence\ObjectManager::class, $manager);
+        $this->assertSame($manager, $this->registry->getManager('custom'));
     }
 
     public function test_cannot_reset_non_existing_managers()