/**
* Validates an attempt.
*
* @param callable $interviewer A callable that will ask for a question and return the result
* @param OutputInterface $output An Output instance
* @param Question $question A Question instance
*
* @return string The validated response
*
* @throws \Exception In case the max number of attempts has been reached and no valid response has been given
*/
private function validateAttempts($interviewer, OutputInterface $output, Question $question)
{
$error = null;
$attempts = $question->getMaxAttempts();
while (null === $attempts || $attempts--) {
if (null !== $error) {
$output->writeln($this->getHelperSet()->get('formatter')->formatBlock($error->getMessage(), 'error'));
}
try {
return call_user_func($question->getValidator(), $interviewer());
} catch (\Exception $error) {
}
}
throw $error;
}
public function testAskAndValidate()
{
$dialog = new QuestionHelper();
$helperSet = new HelperSet(array(new FormatterHelper()));
$dialog->setHelperSet($helperSet);
$error = 'This is not a color!';
$validator = function ($color) use($error) {
if (!in_array($color, array('white', 'black'))) {
throw new \InvalidArgumentException($error);
}
return $color;
};
$question = new Question('What color was the white horse of Henry IV?', 'white');
$question->setValidator($validator);
$question->setMaxAttempts(2);
$dialog->setInputStream($this->getInputStream("\nblack\n"));
$this->assertEquals('white', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
$this->assertEquals('black', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
$dialog->setInputStream($this->getInputStream("green\nyellow\norange\n"));
try {
$this->assertEquals('white', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
$this->fail();
} catch (\InvalidArgumentException $e) {
$this->assertEquals($error, $e->getMessage());
}
}
