[Console] Adapt doc for easier testing of commands needing user inputs

Author: chalasr

components/console/helpers/questionhelper.rst

@@ -276,11 +276,9 @@ You can also use a validator with a hidden question::
 Testing a Command that Expects Input
 ------------------------------------
 
-If you want to write a unit test for a command which expects some kind of input
-from the command line, you need to set the helper input stream::
+If you want to write a unit test for a command which expects user inputs
+from the command line, you need to set the inputs like this:
 
-    use Symfony\Component\Console\Helper\QuestionHelper;
-    use Symfony\Component\Console\Helper\HelperSet;
     use Symfony\Component\Console\Tester\CommandTester;
 
     // ...
@@ -289,26 +287,16 @@ from the command line, you need to set the helper input stream::
         // ...
         $commandTester = new CommandTester($command);
 
-        $helper = $command->getHelper('question');
-        $helper->setInputStream($this->getInputStream('Test\\n'));
+        $commandTester->setUserInputs(array('Test'));
         // Equals to a user inputting "Test" and hitting ENTER
-        // If you need to enter a confirmation, "yes\n" will work
+        // If you need to enter a confirmation, adding a second input saying "yes" will work
 
         $commandTester->execute(array('command' => $command->getName()));
 
         // $this->assertRegExp('/.../', $commandTester->getDisplay());
     }
 
-    protected function getInputStream($input)
-    {
-        $stream = fopen('php://memory', 'r+', false);
-        fputs($stream, $input);
-        rewind($stream);
-
-        return $stream;
-    }
-
-By setting the input stream of the ``QuestionHelper``, you imitate what the
+By calling :method:`CommandTester::setUserInputs`, you imitate what the
 console would do internally with all user input through the CLI. This way
-you can test any user interaction (even complex ones) by passing an appropriate
-input stream.
+you can test any user interaction (even complex ones) by passing the appropriate
+inputs.