Change Next steps section, remove useless file, add assert

Author: zairigimad

src/Maker/MakeMessengerMiddleware.php

@@ -58,8 +58,9 @@ public function generate(InputInterface $input, ConsoleStyle $io, Generator $gen
         $this->writeSuccessMessage($io);
 
         $io->text([
-            'Next: Open your new middleware class and add the code you need.',
-            '      you need to add this middleware to your <info>messenger.yaml</info> file.',
+            'Next:',
+            sprintf('- Open the <info>%s</info> class and add the code you need', $middlewareClassNameDetails->getFullName()),
+            '- Add the middleware to your <info>config/packages/messenger.yaml</info> file',
             'Find the documentation at <fg=yellow>https://symfony.com/doc/current/messenger.html#middleware</>',
         ]);
     }

tests/Maker/MakeMessengerMiddlewareTest.php

@@ -24,7 +24,9 @@ public function getTestDetails()
             [
                 // middleware name
                 'CustomMiddleware',
-            ]),
+            ])->assert(function (string $output, string $directory) {
+                $this->assertFileExists($directory.'/src/Middleware/CustomMiddleware.php');
+            }),
         ];
     }
 }