[Console] Caution about disabling auto exist flag

Author: ybenhssaien

console.rst

@@ -387,6 +387,16 @@ console::
     not dispatched. If you need to test those events, use the
     :class:`Symfony\\Component\\Console\\Tester\\ApplicationTester` instead.
 
+.. caution::
+
+    When testing commands using the ``ApplicationTester`` class, don't forget to disable the auto exist flag :
+
+        $application = new Application();
+        
+        $application->setAutoExit(false);
+        
+        $applicationTester = new ApplicationTester($application);
+
 .. note::
 
     When using the Console component in a standalone project, use