Do not change the old behavior of user creation

core/Command/User/Add.php

@@ -32,6 +32,7 @@
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Question\Question;
@@ -91,7 +92,17 @@ protected function configure() {
 			);
 	}
 
+	/**
+	 * @param InputInterface $input
+	 * @param OutputInterface $output
+	 * @return int
+	 */
 	protected function execute(InputInterface $input, OutputInterface $output) {
+		$stdErr = $output;
+		if ($output instanceof ConsoleOutputInterface) {
+			// If it's available, get stdErr output
+			$stdErr = $output->getErrorOutput();
+		}
 		$uid = $input->getArgument('uid');
 		$email = $input->getOption('email');
 		$displayName = $input->getOption('display-name');
@@ -134,20 +145,20 @@ protected function execute(InputInterface $input, OutputInterface $output) {
 		try {
 			$user = $this->createUserService->createUser(['username' => $uid, 'password' => $password, 'email' => $email]);
 		} catch (InvalidEmailException $e) {
-			$output->writeln('<error>Invalid email address supplied</error>');
+			$stdErr->writeln('<error>Invalid email address supplied</error>');
 			return 1;
 		} catch (CannotCreateUserException $e) {
-			$output->writeln("<error>" . $e->getMessage() .  "</error>");
+			$stdErr->writeln("<error>" . $e->getMessage() .  "</error>");
 			return 1;
 		} catch (UserAlreadyExistsException $e) {
-			$output->writeln("<error>" . $e->getMessage() .  "</error>");
+			$stdErr->writeln("<error>" . $e->getMessage() .  "</error>");
 			return 1;
 		}
 
 		if ($user instanceof IUser) {
 			$output->writeln('<info>The user "' . $user->getUID() . '" was created successfully</info>');
 		} else {
-			$output->writeln('<error>An error occurred while creating the user</error>');
+			$stdErr->writeln('<error>An error occurred while creating the user</error>');
 			return 1;
 		}
 

lib/private/User/Service/CreateUserService.php

@@ -92,7 +92,7 @@ public function __construct(IUserSession $userSession, IGroupManager $groupManag
 	 * @throws UserAlreadyExistsException
 	 */
 	public function createUser($arguments) {
-		$username = $password = $email = '';
+		$password = $email = '';
 		if (\array_key_exists('username', $arguments)) {
 			$username = $arguments['username'];
 		} else {
@@ -125,7 +125,7 @@ public function createUser($arguments) {
 			}
 			$user = $this->userManager->createUser($username, $password);
 		} catch (\Exception $exception) {
-			throw new CannotCreateUserException("Unable to create user due to exception: {$exception->getMessage()}");
+			throw new CannotCreateUserException($exception->getMessage());
 		}
 
 		if ($user === false) {

tests/lib/User/Service/CreateUserServiceTest.php

@@ -140,7 +140,7 @@ public function testAlreadyExistingUser() {
 	}
 
 	/**
-	 * @expectedExceptionMessage Unable to create user due to exception:
+	 * @expectedExceptionMessage Exception Message
 	 * @expectedException  \OCP\User\Exceptions\CannotCreateUserException
 	 */
 	public function testUserCreateException() {
@@ -151,7 +151,7 @@ public function testUserCreateException() {
 			->willReturn(false);
 
 		$this->userManager->method('createUser')
-			->willThrowException(new \Exception());
+			->willThrowException(new \Exception("Exception Message"));
 		$this->createUserService->createUser(['username' => 'foo', 'password' => '', 'email' => '[email protected]']);
 	}