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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\Formatter\OutputFormatter;
use Symfony\Component\Console\Helper\FormatterHelper;
use Symfony\Component\Console\Helper\HelperSet;
use Symfony\Component\Console\Helper\QuestionHelper;
use Symfony\Component\Console\Output\StreamOutput;
use Symfony\Component\Console\Question\ChoiceQuestion;
use Symfony\Component\Console\Question\ConfirmationQuestion;
use Symfony\Component\Console\Question\Question;

/**
 * @group tty
 */
class QuestionHelperTest extends AbstractQuestionHelperTest
{
    public function testAskChoice()
    {
        $questionHelper = new QuestionHelper();

        $helperSet = new HelperSet([new FormatterHelper()]);
        $questionHelper->setHelperSet($helperSet);

        $heroes = ['Superman', 'Batman', 'Spiderman'];

        $inputStream = $this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n");

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '2');
        $question->setMaxAttempts(1);
        // first answer is an empty answer, we're supposed to receive the default value
        $this->assertEquals('Spiderman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes);
        $question->setMaxAttempts(1);
        $this->assertEquals('Batman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('Batman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes);
        $question->setErrorMessage('Input "%s" is not a superhero!');
        $question->setMaxAttempts(2);
        $this->assertEquals('Batman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question));

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

        try {
            $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '1');
            $question->setMaxAttempts(1);
            $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question);
            $this->fail();
        } catch (\InvalidArgumentException $e) {
            $this->assertEquals('Value "Fabien" is invalid', $e->getMessage());
        }

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, null);
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);

        $this->assertEquals(['Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0,1');
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);

        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, ' 0 , 1 ');
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);

        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, 0);
        // We are supposed to get the default value since we are not in interactive mode
        $this->assertEquals('Superman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, true), $this->createOutputInterface(), $question));
    }

    public function testAskChoiceNonInteractive()
    {
        $questionHelper = new QuestionHelper();

        $helperSet = new HelperSet([new FormatterHelper()]);
        $questionHelper->setHelperSet($helperSet);
        $inputStream = $this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n");

        $heroes = ['Superman', 'Batman', 'Spiderman'];

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0');

        $this->assertSame('Superman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, 'Batman');
        $this->assertSame('Batman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, null);
        $this->assertNull($questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0');
        $question->setValidator(null);
        $this->assertSame('Superman', $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        try {
            $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, null);
            $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question);
        } catch (\InvalidArgumentException $e) {
            $this->assertSame('Value "" is invalid', $e->getMessage());
        }

        $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '0, 1');
        $question->setMultiselect(true);
        $this->assertSame(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '0, 1');
        $question->setMultiselect(true);
        $question->setValidator(null);
        $this->assertSame(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '0, Batman');
        $question->setMultiselect(true);
        $this->assertSame(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, null);
        $question->setMultiselect(true);
        $this->assertNull($questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('Who are your favorite superheros?', ['a' => 'Batman', 'b' => 'Superman'], 'a');
        $this->assertSame('a', $questionHelper->ask($this->createStreamableInputInterfaceMock('', false), $this->createOutputInterface(), $question), 'ChoiceQuestion validator returns the key if it\'s a string');

        try {
            $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '');
            $question->setMultiselect(true);
            $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question);
        } catch (\InvalidArgumentException $e) {
            $this->assertSame('Value "" is invalid', $e->getMessage());
        }
    }

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

        $inputStream = $this->getInputStream("\n8AM\n");

        $question = new Question('What time is it?', '2PM');
        $this->assertEquals('2PM', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        $question = new Question('What time is it?', '2PM');
        $this->assertEquals('8AM', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question));

        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 QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new Question('Please select a bundle', 'FrameworkBundle');
        $question->setAutocompleterValues(['AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle']);

        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundleTest', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('FrameworkBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('SecurityBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('FooBundleTest', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('FooBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

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

        // <UP ARROW><UP ARROW><NEWLINE><DOWN ARROW><DOWN ARROW><NEWLINE>
        $inputStream = $this->getInputStream("\033[A\033[A\n\033[B\033[B\n");

        $dialog = new QuestionHelper();
        $dialog->setHelperSet(new HelperSet([new FormatterHelper()]));

        $question = new ChoiceQuestion('Please select a bundle', [1 => 'AcmeDemoBundle', 4 => 'AsseticBundle']);
        $question->setMaxAttempts(1);

        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

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

        $inputStream = $this->getInputStream("b\n");

        $possibleChoices = [
            'a' => 'berlin',
            'b' => 'copenhagen',
            'c' => 'amsterdam',
        ];

        $dialog = new QuestionHelper();
        $dialog->setHelperSet(new HelperSet([new FormatterHelper()]));

        $question = new ChoiceQuestion('Please select a city', $possibleChoices);
        $question->setMaxAttempts(1);

        $this->assertSame('b', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

    public function getInputs()
    {
        return [
            ['$'], // 1 byte character
            ['¢'], // 2 bytes character
            ['€'], // 3 bytes character
            ['𐍈'], // 4 bytes character
        ];
    }

    /**
     * @dataProvider getInputs
     */
    public function testAskWithAutocompleteWithMultiByteCharacter($character)
    {
        if (!$this->hasSttyAvailable()) {
            $this->markTestSkipped('`stty` is required to test autocomplete functionality');
        }

        $inputStream = $this->getInputStream("$character\n");

        $possibleChoices = [
            '$' => '1 byte character',
            '¢' => '2 bytes character',
            '€' => '3 bytes character',
            '𐍈' => '4 bytes character',
        ];

        $dialog = new QuestionHelper();
        $dialog->setHelperSet(new HelperSet([new FormatterHelper()]));

        $question = new ChoiceQuestion('Please select a character', $possibleChoices);
        $question->setMaxAttempts(1);

        $this->assertSame($character, $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

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

        $inputStream = $this->getInputStream('E');

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new Question('');
        $expectedCompletion = 'ExampleNamespace\\';
        $question->setAutocompleterValues([$expectedCompletion]);

        $output = $this->createOutputInterface();
        $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $output, $question);

        $outputStream = $output->getStream();
        rewind($outputStream);
        $actualOutput = stream_get_contents($outputStream);

        // Shell control (esc) sequences are not so important: we only care that
        // <hl> tag is interpreted correctly and replaced
        $irrelevantEscSequences = [
            "\0337" => '', // Save cursor position
            "\0338" => '', // Restore cursor position
            "\033[K" => '', // Clear line from cursor till the end
        ];

        $importantActualOutput = strtr($actualOutput, $irrelevantEscSequences);

        // Remove colors (e.g. "\033[30m", "\033[31;41m")
        $importantActualOutput = preg_replace('/\033\[\d+(;\d+)?m/', '', $importantActualOutput);

        $this->assertEquals($expectedCompletion, $importantActualOutput);
    }

    public function testAskHiddenResponse()
    {
        if ('\\' === \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('This test is not supported on Windows');
        }

        $dialog = new QuestionHelper();

        $question = new Question('What time is it?');
        $question->setHidden(true);

        $this->assertEquals('8AM', $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream("8AM\n")), $this->createOutputInterface(), $question));
    }

    /**
     * @dataProvider getAskConfirmationData
     */
    public function testAskConfirmation($question, $expected, $default = true)
    {
        $dialog = new QuestionHelper();

        $inputStream = $this->getInputStream($question."\n");
        $question = new ConfirmationQuestion('Do you like French fries?', $default);
        $this->assertEquals($expected, $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question), 'confirmation question should '.($expected ? 'pass' : 'cancel'));
    }

    public function getAskConfirmationData()
    {
        return [
            ['', true],
            ['', false, false],
            ['y', true],
            ['yes', true],
            ['n', false],
            ['no', false],
        ];
    }

    public function testAskConfirmationWithCustomTrueAnswer()
    {
        $dialog = new QuestionHelper();

        $inputStream = $this->getInputStream("j\ny\n");
        $question = new ConfirmationQuestion('Do you like French fries?', false, '/^(j|y)/i');
        $this->assertTrue($dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $question = new ConfirmationQuestion('Do you like French fries?', false, '/^(j|y)/i');
        $this->assertTrue($dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

    public function testAskAndValidate()
    {
        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $error = 'This is not a color!';
        $validator = function ($color) use ($error) {
            if (!\in_array($color, ['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);

        $inputStream = $this->getInputStream("\nblack\n");
        $this->assertEquals('white', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('black', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));

        try {
            $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream("green\nyellow\norange\n")), $this->createOutputInterface(), $question);
            $this->fail();
        } catch (\InvalidArgumentException $e) {
            $this->assertEquals($error, $e->getMessage());
        }
    }

    /**
     * @dataProvider simpleAnswerProvider
     */
    public function testSelectChoiceFromSimpleChoices($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            'My environment 1',
            'My environment 2',
            'My environment 3',
        ];

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);
        $answer = $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream($providedAnswer."\n")), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    public function simpleAnswerProvider()
    {
        return [
            [0, 'My environment 1'],
            [1, 'My environment 2'],
            [2, 'My environment 3'],
            ['My environment 1', 'My environment 1'],
            ['My environment 2', 'My environment 2'],
            ['My environment 3', 'My environment 3'],
        ];
    }

    /**
     * @dataProvider specialCharacterInMultipleChoice
     */
    public function testSpecialCharacterChoiceFromMultipleChoiceList($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            '.',
            'src',
        ];

        $dialog = new QuestionHelper();
        $inputStream = $this->getInputStream($providedAnswer."\n");
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the directory', $possibleChoices);
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);
        $answer = $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    public function specialCharacterInMultipleChoice()
    {
        return [
            ['.', ['.']],
            ['., src', ['.', 'src']],
        ];
    }

    /**
     * @dataProvider mixedKeysChoiceListAnswerProvider
     */
    public function testChoiceFromChoicelistWithMixedKeys($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            '0' => 'No environment',
            '1' => 'My environment 1',
            'env_2' => 'My environment 2',
            3 => 'My environment 3',
        ];

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);
        $answer = $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream($providedAnswer."\n")), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    public function mixedKeysChoiceListAnswerProvider()
    {
        return [
            ['0', '0'],
            ['No environment', '0'],
            ['1', '1'],
            ['env_2', 'env_2'],
            [3, '3'],
            ['My environment 1', '1'],
        ];
    }

    /**
     * @dataProvider answerProvider
     */
    public function testSelectChoiceFromChoiceList($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            'env_1' => 'My environment 1',
            'env_2' => 'My environment',
            'env_3' => 'My environment',
        ];

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);
        $answer = $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream($providedAnswer."\n")), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    /**
     * @expectedException        \InvalidArgumentException
     * @expectedExceptionMessage The provided answer is ambiguous. Value should be one of env_2 or env_3.
     */
    public function testAmbiguousChoiceFromChoicelist()
    {
        $possibleChoices = [
            'env_1' => 'My first environment',
            'env_2' => 'My environment',
            'env_3' => 'My environment',
        ];

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);

        $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream("My environment\n")), $this->createOutputInterface(), $question);
    }

    public function answerProvider()
    {
        return [
            ['env_1', 'env_1'],
            ['env_2', 'env_2'],
            ['env_3', 'env_3'],
            ['My environment 1', 'env_1'],
        ];
    }

    public function testNoInteraction()
    {
        $dialog = new QuestionHelper();
        $question = new Question('Do you have a job?', 'not yet');
        $this->assertEquals('not yet', $dialog->ask($this->createStreamableInputInterfaceMock(null, false), $this->createOutputInterface(), $question));
    }

    /**
     * @requires function mb_strwidth
     */
    public function testChoiceOutputFormattingQuestionForUtf8Keys()
    {
        $question = 'Lorem ipsum?';
        $possibleChoices = [
            'foo' => 'foo',
            'żółw' => 'bar',
            'łabądź' => 'baz',
        ];
        $outputShown = [
            $question,
            '  [<info>foo   </info>] foo',
            '  [<info>żółw  </info>] bar',
            '  [<info>łabądź</info>] baz',
        ];
        $output = $this->getMockBuilder('\Symfony\Component\Console\Output\OutputInterface')->getMock();
        $output->method('getFormatter')->willReturn(new OutputFormatter());

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $output->expects($this->once())->method('writeln')->with($this->equalTo($outputShown));

        $question = new ChoiceQuestion($question, $possibleChoices, 'foo');
        $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream("\n")), $output, $question);
    }

    /**
     * @group legacy
     */
    public function testLegacyAskChoice()
    {
        $questionHelper = new QuestionHelper();

        $helperSet = new HelperSet([new FormatterHelper()]);
        $questionHelper->setHelperSet($helperSet);

        $heroes = ['Superman', 'Batman', 'Spiderman'];

        $questionHelper->setInputStream($this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n"));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '2');
        $question->setMaxAttempts(1);
        // first answer is an empty answer, we're supposed to receive the default value
        $this->assertEquals('Spiderman', $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes);
        $question->setMaxAttempts(1);
        $this->assertEquals('Batman', $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('Batman', $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes);
        $question->setErrorMessage('Input "%s" is not a superhero!');
        $question->setMaxAttempts(2);
        $this->assertEquals('Batman', $questionHelper->ask($this->createInputInterfaceMock(), $output = $this->createOutputInterface(), $question));

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

        try {
            $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '1');
            $question->setMaxAttempts(1);
            $questionHelper->ask($this->createInputInterfaceMock(), $output = $this->createOutputInterface(), $question);
            $this->fail();
        } catch (\InvalidArgumentException $e) {
            $this->assertEquals('Value "Fabien" is invalid', $e->getMessage());
        }

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, null);
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);

        $this->assertEquals(['Batman'], $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0,1');
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);

        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));

        $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, ' 0 , 1 ');
        $question->setMaxAttempts(1);
        $question->setMultiselect(true);

        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
    }

    /**
     * @group legacy
     */
    public function testLegacyAsk()
    {
        $dialog = new QuestionHelper();

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

        $question = new Question('What time is it?', '2PM');
        $this->assertEquals('2PM', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));

        $question = new Question('What time is it?', '2PM');
        $this->assertEquals('8AM', $dialog->ask($this->createInputInterfaceMock(), $output = $this->createOutputInterface(), $question));

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

    /**
     * @group legacy
     */
    public function testLegacyAskWithAutocomplete()
    {
        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 QuestionHelper();
        $dialog->setInputStream($inputStream);
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new Question('Please select a bundle', 'FrameworkBundle');
        $question->setAutocompleterValues(['AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle']);

        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundleTest', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('FrameworkBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('SecurityBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('FooBundleTest', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('FooBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
    }

    /**
     * @group legacy
     */
    public function testLegacyAskWithAutocompleteWithNonSequentialKeys()
    {
        if (!$this->hasSttyAvailable()) {
            $this->markTestSkipped('`stty` is required to test autocomplete functionality');
        }

        // <UP ARROW><UP ARROW><NEWLINE><DOWN ARROW><DOWN ARROW><NEWLINE>
        $inputStream = $this->getInputStream("\033[A\033[A\n\033[B\033[B\n");

        $dialog = new QuestionHelper();
        $dialog->setInputStream($inputStream);
        $dialog->setHelperSet(new HelperSet([new FormatterHelper()]));

        $question = new ChoiceQuestion('Please select a bundle', [1 => 'AcmeDemoBundle', 4 => 'AsseticBundle']);
        $question->setMaxAttempts(1);

        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundle', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
    }

    /**
     * @group legacy
     */
    public function testLegacyAskHiddenResponse()
    {
        if ('\\' === \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('This test is not supported on Windows');
        }

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

        $question = new Question('What time is it?');
        $question->setHidden(true);

        $this->assertEquals('8AM', $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
    }

    /**
     * @group        legacy
     * @dataProvider getAskConfirmationData
     */
    public function testLegacyAskConfirmation($question, $expected, $default = true)
    {
        $dialog = new QuestionHelper();

        $dialog->setInputStream($this->getInputStream($question."\n"));
        $question = new ConfirmationQuestion('Do you like French fries?', $default);
        $this->assertEquals($expected, $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question), 'confirmation question should '.($expected ? 'pass' : 'cancel'));
    }

    /**
     * @group legacy
     */
    public function testLegacyAskConfirmationWithCustomTrueAnswer()
    {
        $dialog = new QuestionHelper();

        $dialog->setInputStream($this->getInputStream("j\ny\n"));
        $question = new ConfirmationQuestion('Do you like French fries?', false, '/^(j|y)/i');
        $this->assertTrue($dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
        $question = new ConfirmationQuestion('Do you like French fries?', false, '/^(j|y)/i');
        $this->assertTrue($dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question));
    }

    /**
     * @group legacy
     */
    public function testLegacyAskAndValidate()
    {
        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $error = 'This is not a color!';
        $validator = function ($color) use ($error) {
            if (!\in_array($color, ['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 {
            $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question);
            $this->fail();
        } catch (\InvalidArgumentException $e) {
            $this->assertEquals($error, $e->getMessage());
        }
    }

    /**
     * @group        legacy
     * @dataProvider simpleAnswerProvider
     */
    public function testLegacySelectChoiceFromSimpleChoices($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            'My environment 1',
            'My environment 2',
            'My environment 3',
        ];

        $dialog = new QuestionHelper();
        $dialog->setInputStream($this->getInputStream($providedAnswer."\n"));
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);
        $answer = $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    /**
     * @group        legacy
     * @dataProvider mixedKeysChoiceListAnswerProvider
     */
    public function testLegacyChoiceFromChoicelistWithMixedKeys($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            '0' => 'No environment',
            '1' => 'My environment 1',
            'env_2' => 'My environment 2',
            3 => 'My environment 3',
        ];

        $dialog = new QuestionHelper();
        $dialog->setInputStream($this->getInputStream($providedAnswer."\n"));
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);
        $answer = $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    /**
     * @group        legacy
     * @dataProvider answerProvider
     */
    public function testLegacySelectChoiceFromChoiceList($providedAnswer, $expectedValue)
    {
        $possibleChoices = [
            'env_1' => 'My environment 1',
            'env_2' => 'My environment',
            'env_3' => 'My environment',
        ];

        $dialog = new QuestionHelper();
        $dialog->setInputStream($this->getInputStream($providedAnswer."\n"));
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);
        $answer = $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question);

        $this->assertSame($expectedValue, $answer);
    }

    /**
     * @group                    legacy
     * @expectedException        \InvalidArgumentException
     * @expectedExceptionMessage The provided answer is ambiguous. Value should be one of env_2 or env_3.
     */
    public function testLegacyAmbiguousChoiceFromChoicelist()
    {
        $possibleChoices = [
            'env_1' => 'My first environment',
            'env_2' => 'My environment',
            'env_3' => 'My environment',
        ];

        $dialog = new QuestionHelper();
        $dialog->setInputStream($this->getInputStream("My environment\n"));
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
        $question->setMaxAttempts(1);

        $dialog->ask($this->createInputInterfaceMock(), $this->createOutputInterface(), $question);
    }

    /**
     * @requires function mb_strwidth
     * @group legacy
     */
    public function testLegacyChoiceOutputFormattingQuestionForUtf8Keys()
    {
        $question = 'Lorem ipsum?';
        $possibleChoices = [
            'foo' => 'foo',
            'żółw' => 'bar',
            'łabądź' => 'baz',
        ];
        $outputShown = [
            $question,
            '  [<info>foo   </info>] foo',
            '  [<info>żółw  </info>] bar',
            '  [<info>łabądź</info>] baz',
        ];
        $output = $this->getMockBuilder('\Symfony\Component\Console\Output\OutputInterface')->getMock();
        $output->method('getFormatter')->willReturn(new OutputFormatter());

        $dialog = new QuestionHelper();
        $dialog->setInputStream($this->getInputStream("\n"));
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $output->expects($this->once())->method('writeln')->with($this->equalTo($outputShown));

        $question = new ChoiceQuestion($question, $possibleChoices, 'foo');
        $dialog->ask($this->createInputInterfaceMock(), $output, $question);
    }

    /**
     * @expectedException        \Symfony\Component\Console\Exception\RuntimeException
     * @expectedExceptionMessage Aborted.
     */
    public function testAskThrowsExceptionOnMissingInput()
    {
        $dialog = new QuestionHelper();
        $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream('')), $this->createOutputInterface(), new Question('What\'s your name?'));
    }

    /**
     * @expectedException        \Symfony\Component\Console\Exception\RuntimeException
     * @expectedExceptionMessage Aborted.
     */
    public function testAskThrowsExceptionOnMissingInputForChoiceQuestion()
    {
        $dialog = new QuestionHelper();
        $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream('')), $this->createOutputInterface(), new ChoiceQuestion('Choice', ['a', 'b']));
    }

    /**
     * @expectedException        \Symfony\Component\Console\Exception\RuntimeException
     * @expectedExceptionMessage Aborted.
     */
    public function testAskThrowsExceptionOnMissingInputWithValidator()
    {
        $dialog = new QuestionHelper();

        $question = new Question('What\'s your name?');
        $question->setValidator(function () {
            if (!$value) {
                throw new \Exception('A value is required.');
            }
        });

        $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream('')), $this->createOutputInterface(), $question);
    }

    /**
     * @expectedException \LogicException
     * @expectedExceptionMessage Choice question must have at least 1 choice available.
     */
    public function testEmptyChoices()
    {
        new ChoiceQuestion('Question', [], 'irrelevant');
    }

    public function testTraversableAutocomplete()
    {
        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 QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new Question('Please select a bundle', 'FrameworkBundle');
        $question->setAutocompleterValues(new AutocompleteValues(['irrelevant' => 'AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle']));

        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundleTest', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('FrameworkBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('SecurityBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('FooBundleTest', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('AsseticBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals('FooBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

    public function testTraversableMultiselectAutocomplete()
    {
        // <NEWLINE>
        // F<TAB><NEWLINE>
        // A<3x UP ARROW><TAB>,F<TAB><NEWLINE>
        // F00<BACKSPACE><BACKSPACE>o<TAB>,A<DOWN ARROW>,<SPACE>SecurityBundle<NEWLINE>
        // Acme<TAB>,<SPACE>As<TAB><29x BACKSPACE>S<TAB><NEWLINE>
        // Ac<TAB>,As<TAB><3x BACKSPACE>d<TAB><NEWLINE>
        $inputStream = $this->getInputStream("\nF\t\nA\033[A\033[A\033[A\t,F\t\nF00\177\177o\t,A\033[B\t, SecurityBundle\nAcme\t, As\t\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177\177S\t\nAc\t,As\t\177\177\177d\t\n");

        $dialog = new QuestionHelper();
        $helperSet = new HelperSet([new FormatterHelper()]);
        $dialog->setHelperSet($helperSet);

        $question = new ChoiceQuestion(
            'Please select a bundle (defaults to AcmeDemoBundle and AsseticBundle)',
            ['AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle'],
            '0,1'
        );

        // This tests that autocomplete works for all multiselect choices entered by the user
        $question->setMultiselect(true);

        $this->assertEquals(['AcmeDemoBundle', 'AsseticBundle'], $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['FooBundle'], $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['AsseticBundle', 'FooBundle'], $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['FooBundle', 'AsseticBundle', 'SecurityBundle'], $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['SecurityBundle'], $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
        $this->assertEquals(['AcmeDemoBundle', 'AsseticBundle'], $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
    }

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

        return $stream;
    }

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

    protected function createInputInterfaceMock($interactive = true)
    {
        $mock = $this->getMockBuilder('Symfony\Component\Console\Input\InputInterface')->getMock();
        $mock->expects($this->any())
            ->method('isInteractive')
            ->will($this->returnValue($interactive));

        return $mock;
    }

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

        return 0 === $exitcode;
    }
}

class AutocompleteValues implements \IteratorAggregate
{
    private $values;

    public function __construct(array $values)
    {
        $this->values = $values;
    }

    public function getIterator()
    {
        return new \ArrayIterator($this->values);
    }
}

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