#337: adjust type annotations, ensoure integer return type in all instances

Author: powli

src/Magento/FunctionalTestingFramework/Console/RunTestCommand.php

@@ -46,7 +46,7 @@ protected function configure()
      *
      * @param InputInterface  $input
      * @param OutputInterface $output
-     * @return int
+     * @return integer
      * @throws \Exception
      *
      * @SuppressWarnings(PHPMD.UnusedLocalVariable)

src/Magento/FunctionalTestingFramework/Console/RunTestFailedCommand.php

@@ -59,7 +59,7 @@ protected function configure()
      *
      * @param InputInterface  $input
      * @param OutputInterface $output
-     * @return int
+     * @return integer
      * @throws \Exception
      *
      * @SuppressWarnings(PHPMD.UnusedLocalVariable)
@@ -78,7 +78,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         $testConfiguration = $this->getFailedTestList();
 
         if ($testConfiguration === null) {
-            return null;
+            // no failed tests found, run is a success
+            return 0;
         }
 
         $command = $this->getApplication()->find('generate:tests');

src/Magento/FunctionalTestingFramework/Console/RunTestGroupCommand.php

@@ -53,7 +53,7 @@ protected function configure()
      *
      * @param InputInterface  $input
      * @param OutputInterface $output
-     * @return int
+     * @return integer
      * @throws \Exception
      *
      * @SuppressWarnings(PHPMD.UnusedLocalVariable)