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    <textarea name="content" rows="20" cols="80">&lt;?php

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

namespace Symfony\Component\Console\Tester;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Completion\CompletionInput;
use Symfony\Component\Console\Completion\CompletionSuggestions;

/**
 * Eases the testing of command completion.
 *
 * @author Jérôme Tamarelle &lt;jerome@tamarelle.net&gt;
 */
class CommandCompletionTester
{
    private $command;

    public function __construct(Command $command)
    {
        $this-&gt;command = $command;
    }

    /**
     * Create completion suggestions from input tokens.
     */
    public function complete(array $input): array
    {
        $currentIndex = \count($input);
        if ('' === end($input)) {
            array_pop($input);
        }
        array_unshift($input, $this-&gt;command-&gt;getName());

        $completionInput = CompletionInput::fromTokens($input, $currentIndex);
        $completionInput-&gt;bind($this-&gt;command-&gt;getDefinition());
        $suggestions = new CompletionSuggestions();

        $this-&gt;command-&gt;complete($completionInput, $suggestions);

        $options = [];
        foreach ($suggestions-&gt;getOptionSuggestions() as $option) {
            $options[] = '--'.$option-&gt;getName();
        }

        return array_map('strval', array_merge($options, $suggestions-&gt;getValueSuggestions()));
    }
}
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