Edit: DialogHelperTest.php

Editing: DialogHelperTest.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console\Tests\Helper;

use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Helper\DialogHelper;
use Symfony\Component\Console\Helper\HelperSet;
use Symfony\Component\Console\Helper\FormatterHelper;
use Symfony\Component\Console\Output\StreamOutput;

class DialogHelperTest extends \PHPUnit_Framework_TestCase
{
    public function testSelect()
    {
        $dialog = new DialogHelper();

$helperSet = new HelperSet(array(new FormatterHelper()));
        $dialog->setHelperSet($helperSet);

$heroes = array('Superman', 'Batman', 'Spiderman');

$dialog->setInputStream($this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n"));
        $this->assertEquals('2', $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes, '2'));
        $this->assertEquals('1', $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes));
        $this->assertEquals('1', $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes));
        $this->assertEquals('1', $dialog->select($output = $this->getOutputStream(), 'What is your favorite superhero?', $heroes, null, false, 'Input "%s" is not a superhero!', false));

rewind($output->getStream());
        $this->assertContains('Input "Fabien" is not a superhero!', stream_get_contents($output->getStream()));

try {
            $this->assertEquals('1', $dialog->select($output = $this->getOutputStream(), 'What is your favorite superhero?', $heroes, null, 1));
            $this->fail();
        } catch (\InvalidArgumentException $e) {
            $this->assertEquals('Value "Fabien" is invalid', $e->getMessage());
        }

$this->assertEquals(array('1'), $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes, null, false, 'Input "%s" is not a superhero!', true));
        $this->assertEquals(array('0', '2'), $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes, null, false, 'Input "%s" is not a superhero!', true));
        $this->assertEquals(array('0', '2'), $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes, null, false, 'Input "%s" is not a superhero!', true));
        $this->assertEquals(array('0', '1'), $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes, '0,1', false, 'Input "%s" is not a superhero!', true));
        $this->assertEquals(array('0', '1'), $dialog->select($this->getOutputStream(), 'What is your favorite superhero?', $heroes, ' 0 , 1 ', false, 'Input "%s" is not a superhero!', true));
    }

public function testAsk()
    {
        $dialog = new DialogHelper();

$dialog->setInputStream($this->getInputStream("\n8AM\n"));

$this->assertEquals('2PM', $dialog->ask($this->getOutputStream(), 'What time is it?', '2PM'));
        $this->assertEquals('8AM', $dialog->ask($output = $this->getOutputStream(), 'What time is it?', '2PM'));

rewind($output->getStream());
        $this->assertEquals('What time is it?', stream_get_contents($output->getStream()));
    }

public function testAskWithAutocomplete()
    {
        if (!$this->hasSttyAvailable()) {
            $this->markTestSkipped('`stty` is required to test autocomplete functionality');
        }

// Acm<NEWLINE>
        // Ac<BACKSPACE><BACKSPACE>s<TAB>Test<NEWLINE>
        // <NEWLINE>
        // <UP ARROW><UP ARROW><NEWLINE>
        // <UP ARROW><UP ARROW><UP ARROW><UP ARROW><UP ARROW><TAB>Test<NEWLINE>
        // <DOWN ARROW><NEWLINE>
        // S<BACKSPACE><BACKSPACE><DOWN ARROW><DOWN ARROW><NEWLINE>
        // F00<BACKSPACE><BACKSPACE>oo<TAB><NEWLINE>
        $inputStream = $this->getInputStream("Acm\nAc\177\177s\tTest\n\n\033[A\033[A\n\033[A\033[A\033[A\033[A\033[A\tTest\n\033[B\nS\177\177\033[B\033[B\nF00\177\177oo\t\n");

$dialog = new DialogHelper();
        $dialog->setInputStream($inputStream);

$bundles = array('AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle');

$this->assertEquals('AcmeDemoBundle', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('AsseticBundleTest', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('FrameworkBundle', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('SecurityBundle', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('FooBundleTest', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('AsseticBundle', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
        $this->assertEquals('FooBundle', $dialog->ask($this->getOutputStream(), 'Please select a bundle', 'FrameworkBundle', $bundles));
    }

/**
     * @group tty
     */
    public function testAskHiddenResponse()
    {
        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
            $this->markTestSkipped('This test is not supported on Windows');
        }

$dialog = new DialogHelper();

$dialog->setInputStream($this->getInputStream("8AM\n"));

$this->assertEquals('8AM', $dialog->askHiddenResponse($this->getOutputStream(), 'What time is it?'));
    }

public function testAskConfirmation()
    {
        $dialog = new DialogHelper();

$dialog->setInputStream($this->getInputStream("\n\n"));
        $this->assertTrue($dialog->askConfirmation($this->getOutputStream(), 'Do you like French fries?'));
        $this->assertFalse($dialog->askConfirmation($this->getOutputStream(), 'Do you like French fries?', false));

$dialog->setInputStream($this->getInputStream("y\nyes\n"));
        $this->assertTrue($dialog->askConfirmation($this->getOutputStream(), 'Do you like French fries?', false));
        $this->assertTrue($dialog->askConfirmation($this->getOutputStream(), 'Do you like French fries?', false));

$dialog->setInputStream($this->getInputStream("n\nno\n"));
        $this->assertFalse($dialog->askConfirmation($this->getOutputStream(), 'Do you like French fries?', true));
        $this->assertFalse($dialog->askConfirmation($this->getOutputStream(), 'Do you like French fries?', true));
    }

public function testAskAndValidate()
    {
        $dialog = new DialogHelper();
        $helperSet = new HelperSet(array(new FormatterHelper()));
        $dialog->setHelperSet($helperSet);

$question ='What color was the white horse of Henry IV?';
        $error = 'This is not a color!';
        $validator = function ($color) use ($error) {
            if (!in_array($color, array('white', 'black'))) {
                throw new \InvalidArgumentException($error);
            }

return $color;
        };

$dialog->setInputStream($this->getInputStream("\nblack\n"));
        $this->assertEquals('white', $dialog->askAndValidate($this->getOutputStream(), $question, $validator, 2, 'white'));
        $this->assertEquals('black', $dialog->askAndValidate($this->getOutputStream(), $question, $validator, 2, 'white'));

$dialog->setInputStream($this->getInputStream("green\nyellow\norange\n"));
        try {
            $this->assertEquals('white', $dialog->askAndValidate($this->getOutputStream(), $question, $validator, 2, 'white'));
            $this->fail();
        } catch (\InvalidArgumentException $e) {
            $this->assertEquals($error, $e->getMessage());
        }
    }

public function testNoInteraction()
    {
        $dialog = new DialogHelper();

$input = new ArrayInput(array());
        $input->setInteractive(false);

$dialog->setInput($input);

$this->assertEquals('not yet', $dialog->ask($this->getOutputStream(), 'Do you have a job?', 'not yet'));
    }

protected function getInputStream($input)
    {
        $stream = fopen('php://memory', 'r+', false);
        fputs($stream, $input);
        rewind($stream);

return $stream;
    }

protected function getOutputStream()
    {
        return new StreamOutput(fopen('php://memory', 'r+', false));
    }

private function hasSttyAvailable()
    {
        exec('stty 2>&1', $output, $exitcode);

return $exitcode === 0;
    }
}