Behat\Mink\Driver\PantherDriver

Complexity

Total Complexity

128

Size/Duplication

Total Lines	984
Duplicated Lines	0 %

Test Coverage

Coverage

2.63%

Importance

Changes	20
Bugs	0	Features	5

69 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	getResponse()	0	9	2
A	isStarted()	0	3	1
A	getContent()	0	3	1
A	setRemoveHostFromUrl()	0	7	1
A	setRemoveScriptFromUrl()	0	7	1
A	switchToWindow()	0	4	1
A	getHtml()	0	4	1
A	check()	0	3	1
A	getCrawlerElement()	0	9	2
A	getJsNode()	0	5	1
A	keyUp()	0	15	3
A	setCookie()	0	11	2
A	keyDown()	0	10	2
A	getOuterHtml()	0	5	1
A	click()	0	4	1
A	isSelected()	0	3	1
A	resizeWindow()	0	4	1
A	getWebdriverModifierKeyValue()	0	22	6
A	getInputFormField()	0	12	2
A	isChecked()	0	3	1
A	prepareUrl()	0	5	3
A	stop()	0	5	1
A	findElementXpaths()	0	10	2
A	getTextareaFormField()	0	12	2
A	getFileFormField()	0	12	2
A	getWindowName()	0	3	1
A	selectOption()	0	14	2
A	getCurrentUrl()	0	3	1
A	visit()	0	3	1
A	mouseOver()	0	3	1
A	reload()	0	3	1
A	toCoordinates()	0	11	2
A	dragTo()	0	6	1
A	deleteCookie()	0	12	3
A	maximizeWindow()	0	5	1
A	getValue()	0	15	4
A	getAttribute()	0	16	3
A	getCrawler()	0	9	2
A	focus()	0	5	1
A	doubleClick()	0	3	1
A	geWebDriverKeyValue()	0	7	2
A	getCookiePath()	0	9	2
A	getWindowNames()	0	3	1
A	getText()	0	7	1
A	getWebDriverActions()	0	9	2
B	getFormField()	0	26	7
A	getScreenshot()	0	3	1
A	submitForm()	0	6	1
A	attachFile()	0	11	2
A	reset()	0	34	6
A	executeScript()	0	8	2
A	rightClick()	0	3	1
A	start()	0	6	1
A	switchToIFrame()	0	11	3
A	uncheck()	0	3	1
A	back()	0	3	1
A	getChoiceFormField()	0	16	2
A	isVisible()	0	3	1
A	evaluateScript()	0	7	2
A	getClient()	0	7	2
A	keyPress()	0	14	2
A	wait()	0	12	3
A	getCookie()	0	11	3
A	setValue()	0	26	5
A	blur()	0	9	2
A	getTagName()	0	3	1
A	getFilteredCrawler()	0	7	2
A	forward()	0	3	1

<?php
declare(strict_types=1);

/*
 * This file is part of the Behat\Mink.
 * (c) Robert Freigang <robert.freigang@gmx.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Behat\Mink\Driver;

use Behat\Mink\Exception\DriverException;
use Behat\Mink\Exception\UnsupportedDriverActionException;
use Facebook\WebDriver\Interactions\Internal\WebDriverCoordinates;
use Facebook\WebDriver\Interactions\WebDriverActions;
use Facebook\WebDriver\Internal\WebDriverLocatable;
use Facebook\WebDriver\JavaScriptExecutor;
use Facebook\WebDriver\WebDriverDimension;
use Facebook\WebDriver\WebDriverElement;
use Facebook\WebDriver\WebDriverHasInputDevices;
use Facebook\WebDriver\WebDriverKeys;
use Symfony\Component\BrowserKit\Cookie;
use Symfony\Component\BrowserKit\Response;
use Symfony\Component\DomCrawler\Field\FormField;
use Symfony\Component\Panther\Client;
use Symfony\Component\Panther\DomCrawler\Crawler;
use Symfony\Component\Panther\DomCrawler\Field\ChoiceFormField;
use Symfony\Component\Panther\DomCrawler\Field\FileFormField;
use Symfony\Component\Panther\DomCrawler\Field\InputFormField;
use Symfony\Component\Panther\DomCrawler\Field\TextareaFormField;
use Symfony\Component\Panther\PantherTestCaseTrait;

/**
 * Symfony2 Panther driver.
 *
 * @author Robert Freigang <robertfreigang@gmx.de>
 */
class PantherDriver extends CoreDriver
{
    use PantherTestCaseTrait;

    // PantherTestCaseTrait needs this constants; provided via "\Symfony\Component\Panther\PantherTestCase"
    public const CHROME = 'chrome';
    public const FIREFOX = 'firefox';

    /** @var Client|null */
    private $client;
    private $started = false;
    private $removeScriptFromUrl = false;
    private $removeHostFromUrl = false;
    /** @var array */
    private $options;

    public function __construct(
        array $options = []
    ) {
        $this->options = $options;
    }

    /**
     * Returns BrowserKit HTTP client instance.
     *
     * @return Client
     */
    public function getClient()
    {
        if (!$this->isStarted()) {
            throw new DriverException('Client is not (yet) started.');
        }

        return $this->client;
    }

    /**
     * Tells driver to remove hostname from URL.
     *
     * @param Boolean $remove
     *
     * @deprecated Deprecated as of 1.2, to be removed in 2.0. Pass the base url in the constructor instead.
     */
    public function setRemoveHostFromUrl($remove = true)
    {
        @trigger_error(
            'setRemoveHostFromUrl() is deprecated as of 1.2 and will be removed in 2.0. Pass the base url in the constructor instead.',
            E_USER_DEPRECATED
        );
        $this->removeHostFromUrl = (bool) $remove;
    }

    /**
     * Tells driver to remove script name from URL.
     *
     * @param Boolean $remove
     *
     * @deprecated Deprecated as of 1.2, to be removed in 2.0. Pass the base url in the constructor instead.
     */
    public function setRemoveScriptFromUrl($remove = true)
    {
        @trigger_error(
            'setRemoveScriptFromUrl() is deprecated as of 1.2 and will be removed in 2.0. Pass the base url in the constructor instead.',
            E_USER_DEPRECATED
        );
        $this->removeScriptFromUrl = (bool) $remove;
    }

    /**
     * {@inheritdoc}
     */
    public function start()
    {
        $this->client = self::createPantherClient($this->options);
        $this->client->start();

        $this->started = true;
    }

    /**
     * {@inheritdoc}
     */
    public function isStarted()
    {
        return $this->started;
    }

    /**
     * {@inheritdoc}
     */
    public function stop()
    {
        $this->getClient()->quit();
        self::stopWebServer();
        $this->started = false;
    }

    /**
     * {@inheritdoc}
     */
    public function reset()
    {
        // experimental
        // $useSpeedUp = false;
        $useSpeedUp = true;
        if ($useSpeedUp) {

The condition $useSpeedUp is always true.

            $this->getClient()->getWebDriver()->manage()->deleteAllCookies();
            try {
                $history = $this->getClient()->getHistory();
                if ($history) {
                    $history->clear();
                }
            } catch (\LogicException $e) {
                // History is not available when using e.g. WebDriver.
            }
            if (
                $this->getClient()->getWebDriver() instanceof JavaScriptExecutor
                && !in_array($this->getClient()->getCurrentURL(), ['', 'about:blank', 'data:,'], true)
            ) {
                $this->executeScript('localStorage.clear();');
            }
            // not sure if we should also close all windows
            // $lastWindowHandle = \end($this->getClient()->getWindowHandles());
            // if ($lastWindowHandle) {
            //     $this->getClient()->switchTo()->window($lastWindowHandle);
            // }
            // $this->getClient()->getWebDriver()->navigate()->refresh();
            // $this->getClient()->refreshCrawler();
            // if (\count($this->getClient()->getWindowHandles()) > 1) {
            //     $this->getClient()->getWebDriver()->close();
            // }
        } else {
            // Restarting the client resets the cookies and the history
            $this->getClient()->restart();
        }

    }

    /**
     * {@inheritdoc}
     */
    public function visit($url)
    {
        $this->getClient()->get($this->prepareUrl($url));
    }

    /**
     * {@inheritdoc}
     */
    public function getCurrentUrl()
    {
        return $this->getClient()->getCurrentURL();
    }

    /**
     * {@inheritdoc}
     */
    public function reload()
    {
        $this->getClient()->reload();
    }

    /**
     * {@inheritdoc}
     */
    public function forward()
    {
        $this->getClient()->forward();
    }

    /**
     * {@inheritdoc}
     */
    public function back()
    {
        $this->getClient()->back();
    }

    /**
     * {@inheritdoc}
     */
    public function switchToWindow($name = null)
    {
        $this->getClient()->switchTo()->window($name);
        $this->getClient()->refreshCrawler();
    }

    /**
     * {@inheritdoc}
     */
    public function switchToIFrame($name = null)
    {
        if (null === $name) {
            $this->getClient()->switchTo()->defaultContent();
        } elseif ($name) {
            $iFrameElement = $this->getCrawlerElement($this->getFilteredCrawler(\sprintf("//iframe[@name='%s']", $name)));
            $this->getClient()->switchTo()->frame($iFrameElement);
        } else {
            $this->getClient()->switchTo()->frame(null);
        }
        $this->getClient()->refreshCrawler();
    }

    /**
     * {@inheritdoc}
     */
    public function setCookie($name, $value = null)
    {
        if (null === $value) {
            $this->deleteCookie($name);

            return;
        }

        $jar = $this->getClient()->getCookieJar();
        // @see: https://github.com/w3c/webdriver/issues/1238
        $jar->set(new Cookie($name, \rawurlencode((string) $value)));
    }

    /**
     * {@inheritdoc}
     */
    public function getCookie($name)
    {
        $cookies = $this->getClient()->getCookieJar()->all();

        foreach ($cookies as $cookie) {
            if ($cookie->getName() === $name) {
                return \urldecode($cookie->getValue());
            }
        }

        return null;
    }

    /**
     * {@inheritdoc}
     */
    public function getContent()
    {
        return $this->getClient()->getWebDriver()->getPageSource();
    }

    /**
     * {@inheritdoc}
     */
    public function getScreenshot($saveAs = null): string
    {
        return $this->getClient()->takeScreenshot($saveAs);
    }

    /**
     * {@inheritdoc}
     */
    public function getWindowNames()
    {
        return $this->getClient()->getWindowHandles();
    }

    /**
     * {@inheritdoc}
     */
    public function getWindowName()
    {
        return $this->getClient()->getWindowHandle();
    }

    /**
     * {@inheritdoc}
     */
    public function isVisible($xpath)
    {
        return $this->getCrawlerElement($this->getFilteredCrawler($xpath))->isDisplayed();
    }

    /**
     * {@inheritdoc}.
     */
    public function mouseOver($xpath)
    {
        $this->getClient()->getMouse()->mouseMove($this->toCoordinates($xpath));
    }

    /**
     * {@inheritdoc}
     */
    public function focus($xpath)
    {
        $jsNode = $this->getJsNode($xpath);
        $script = \sprintf('%s.focus()', $jsNode);
        $this->executeScript($script);
    }

    /**
     * {@inheritdoc}
     */
    public function blur($xpath)
    {
        $jsNode = $this->getJsNode($xpath);
        $script = \sprintf('%s.blur();', $jsNode);
        // ensure element had active state; just for passing EventsTest::testBlur
        if ($this->evaluateScript(\sprintf('document.activeElement !== %s', $jsNode))) {
            $script = \sprintf('%s.focus();%s', $jsNode, $script);
        }
        $this->executeScript($script);
    }

    /**
     * {@inheritdoc}
     */
    public function keyPress($xpath, $char, $modifier = null)
    {
        $webDriverActions = $this->getWebDriverActions();
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        $key = $this->geWebDriverKeyValue($char);

        $modifier = $this->getWebdriverModifierKeyValue($modifier);

        if ($modifier) {
            $webDriverActions->keyDown($element, $modifier)->perform();
            $webDriverActions->sendKeys($element, $key)->perform();
            $webDriverActions->keyUp($element, $modifier)->perform();
        } else {
            $webDriverActions->sendKeys($element, $key)->perform();
        }
    }

    /**
     * {@inheritdoc}
     */
    public function keyDown($xpath, $char, $modifier = null)
    {
        $webDriverActions = $this->getWebDriverActions();
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        $key = $this->geWebDriverKeyValue($char);

        $webDriverActions->keyDown($element, $key)->perform();
        $modifier = $this->getWebdriverModifierKeyValue($modifier);
        if ($modifier) {
            $webDriverActions->keyDown($element, $modifier)->perform();
        }
    }

    /**
     * {@inheritdoc}
     */
    public function keyUp($xpath, $char, $modifier = null)
    {
        $webDriverActions = $this->getWebDriverActions();
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        $key = $this->geWebDriverKeyValue($char);

        $modifier = $this->getWebdriverModifierKeyValue($modifier);
        if ($modifier) {
            $webDriverActions->keyDown($element, $modifier)->perform();
        }

        $webDriverActions->keyDown($element, $key)->perform();
        $webDriverActions->keyUp($element, $key)->perform();
        if ($modifier) {
            $webDriverActions->keyUp($element, $modifier)->perform();
        }
    }

    /**
     * {@inheritdoc}
     */
    public function isSelected($xpath)
    {
        return $this->getCrawlerElement($this->getFilteredCrawler($xpath))->isSelected();
    }

    /**
     * {@inheritdoc}
     */
    public function findElementXpaths($xpath)
    {
        $nodes = $this->getCrawler()->filterXPath($xpath);

        $elements = [];
        foreach ($nodes as $i => $node) {
            $elements[] = sprintf('(%s)[%d]', $xpath, $i + 1);
        }

        return $elements;
    }

    /**
     * {@inheritdoc}
     */
    public function getTagName($xpath)
    {
        return $this->getCrawlerElement($this->getFilteredCrawler($xpath))->getTagName();
    }

    /**
     * {@inheritdoc}
     */
    public function getText($xpath)
    {
        $text = $this->getFilteredCrawler($xpath)->text();
        $text = str_replace("\n", ' ', $text);
        $text = preg_replace('/ {2,}/', ' ', $text);

        return trim($text);
    }

    /**
     * {@inheritdoc}
     */
    public function getHtml($xpath)
    {
        // cut the tag itself (making innerHTML out of outerHTML)
        return preg_replace('/^\<[^\>]+\>|\<[^\>]+\>$/', '', $this->getOuterHtml($xpath));
    }

    /**
     * {@inheritdoc}
     */
    public function getOuterHtml($xpath)
    {
        $crawler = $this->getFilteredCrawler($xpath);

        return $crawler->html();
    }

    /**
     * {@inheritdoc}
     */
    public function getAttribute($xpath, $name)
    {
        $crawler = $this->getFilteredCrawler($xpath);

        $attribute = $this->getCrawlerElement($crawler)->getAttribute($name);

        // let's get hacky
        if ('' === $attribute) {
            $html = \strtolower($crawler->html());
            $name = \strtolower($name).'=';
            if (0 === \substr_count($html, $name)) {
                $attribute = null;
            }
        }

        return $attribute;
    }

    /**
     * {@inheritdoc}
     */
    public function getValue($xpath)
    {
        try {
            $formField = $this->getFormField($xpath);
            $value = $formField->getValue();
            if ('' === $value && $formField instanceof ChoiceFormField) {
                $value = null;
            }
        } catch (DriverException $e) {
            // e.g. element is an option
            $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
            $value = $element->getAttribute('value');
        }

        return $value;
    }

    /**
     * {@inheritdoc}
     */
    public function setValue($xpath, $value)
    {
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        $jsNode = $this->getJsNode($xpath);

        if ('input' === $element->getTagName() && \in_array($element->getAttribute('type'), ['date', 'time', 'color'])) {
            $this->executeScript(\sprintf('%s.value = \'%s\'', $jsNode, $value));
        } else {
            try {
                $formField = $this->getFormField($xpath);
                $formField->setValue($value);
            } catch (DriverException $e) {
                // e.g. element is on option
                $element->sendKeys($value);
            }
        }

        // Remove the focus from the element if the field still has focus in
        // order to trigger the change event. By doing this instead of simply
        // triggering the change event for the given xpath we ensure that the
        // change event will not be triggered twice for the same element if it
        // has lost focus in the meanwhile. If the element has lost focus
        // already then there is nothing to do as this will already have caused
        // the triggering of the change event for that element.
        if ($this->evaluateScript(\sprintf('document.activeElement === %s', $jsNode))) {
            $this->executeScript('document.activeElement.blur();');
        }
    }

    /**
     * {@inheritdoc}
     */
    public function check($xpath)
    {
        $this->getChoiceFormField($xpath)->tick();
    }

    /**
     * {@inheritdoc}
     */
    public function uncheck($xpath)
    {
        $this->getChoiceFormField($xpath)->untick();
    }

    /**
     * {@inheritdoc}
     */
    public function selectOption($xpath, $value, $multiple = false)
    {
        $field = $this->getFormField($xpath);

        if (!$field instanceof ChoiceFormField) {
            throw new DriverException(
                sprintf(
                    'Impossible to select an option on the element with XPath "%s" as it is not a select or radio input',
                    $xpath
                )
            );
        }

        $field->select($value);
    }

    /**
     * {@inheritdoc}
     */
    public function click($xpath)
    {
        $this->getClient()->getMouse()->click($this->toCoordinates($xpath));
        $this->getClient()->refreshCrawler();
    }

    /**
     * {@inheritdoc}
     */
    public function doubleClick($xpath)
    {
        $this->getClient()->getMouse()->doubleClick($this->toCoordinates($xpath));
    }

    /**
     * {@inheritdoc}
     */
    public function rightClick($xpath)
    {
        $this->getClient()->getMouse()->contextClick($this->toCoordinates($xpath));
    }

    /**
     * {@inheritdoc}
     */
    public function isChecked($xpath)
    {
        return $this->getChoiceFormField($xpath)->hasValue();
    }

    /**
     * {@inheritdoc}
     */
    public function attachFile($xpath, $path)
    {
        $field = $this->getFormField($xpath);

        if (!$field instanceof FileFormField) {
            throw new DriverException(
                sprintf('Impossible to attach a file on the element with XPath "%s" as it is not a file input', $xpath)
            );
        }

        $field->upload($path);
    }

    /**
     * {@inheritdoc}
     */
    public function dragTo($sourceXpath, $destinationXpath)
    {
        $webDriverActions = $this->getWebDriverActions();
        $source = $this->getCrawlerElement($this->getFilteredCrawler($sourceXpath));
        $target = $this->getCrawlerElement($this->getFilteredCrawler($destinationXpath));
        $webDriverActions->dragAndDrop($source, $target)->perform();
    }

    /**
     * {@inheritdoc}
     */
    public function executeScript($script)
    {
        if (\preg_match('/^function[\s\(]/', $script)) {
            $script = \preg_replace('/;$/', '', $script);
            $script = '('.$script.')';
        }

        return $this->getClient()->executeScript($script);
    }

    /**
     * {@inheritdoc}
     */
    public function evaluateScript($script)
    {
        if (0 !== \strpos(\trim($script), 'return ')) {
            $script = 'return '.$script;
        }

        return $this->getClient()->executeScript($script);
    }

    /**
     * {@inheritdoc}
     */
    public function wait($timeout, $condition)
    {
        $script = "return $condition;";
        $start = microtime(true);
        $end = $start + $timeout / 1000.0;

        do {
            $result = $this->evaluateScript($script);
            \usleep(100000);
        } while (\microtime(true) < $end && !$result);

        return (bool) $result;
    }

    /**
     * {@inheritdoc}
     */
    public function resizeWindow($width, $height, $name = null)
    {
        $size = new WebDriverDimension($width, $height);
        $this->getClient()->getWebDriver()->manage()->window()->setSize($size);
    }

    /**
     * {@inheritdoc}
     */
    public function maximizeWindow($name = null)
    {
        $width = $this->evaluateScript('screen.width');
        $height = $this->evaluateScript('screen.height');
        $this->resizeWindow($width, $height, $name);
    }

    /**
     * {@inheritdoc}
     */
    public function submitForm($xpath)
    {
        $crawler = $this->getFilteredCrawler($xpath);

        $this->getClient()->submit($crawler->form());
        $this->getClient()->refreshCrawler();
    }

    /**
     * @return Response
     *
     * @throws DriverException If there is not response yet
     */
    protected function getResponse()
    {
        $response = $this->getClient()->getInternalResponse();

        if (null === $response) {
            throw new DriverException('Unable to access the response before visiting a page');
        }

        return $response;
    }

    /**
     * Prepares URL for visiting.
     * Removes "*.php/" from urls and then passes it to BrowserKitDriver::visit().
     *
     * @param string $url
     *
     * @return string
     */
    protected function prepareUrl($url)
    {
        $replacement = ($this->removeHostFromUrl ? '' : '$1').($this->removeScriptFromUrl ? '' : '$2');

        return preg_replace('#(https?\://[^/]+)(/[^/\.]+\.php)?#', $replacement, $url);
    }

    /**
     * Deletes a cookie by name.
     *
     * @param string $name Cookie name.
     */
    private function deleteCookie($name)
    {
        $path = $this->getCookiePath();
        $jar = $this->getClient()->getCookieJar();

        do {
            if (null !== $jar->get($name, $path)) {
                $jar->expire($name, $path);
            }

            $path = preg_replace('/.$/', '', $path);
        } while ($path);
    }

    /**
     * Returns current cookie path.
     *
     * @return string
     */
    private function getCookiePath()
    {
        $path = dirname(parse_url($this->getCurrentUrl(), PHP_URL_PATH));

        if ('\\' === DIRECTORY_SEPARATOR) {
            $path = str_replace('\\', '/', $path);
        }

        return $path;
    }

    /**
     * Returns form field from XPath query.
     *
     * @param string $xpath
     *
     * @return FormField
     *
     * @throws DriverException
     */
    private function getFormField($xpath)
    {
        try {
            $formField = $this->getChoiceFormField($xpath);
        } catch (DriverException $e) {
            $formField = null;
        }
        if (!$formField) {
            try {
                $formField = $this->getInputFormField($xpath);
            } catch (DriverException $e) {
                $formField = null;
            }
        }
        if (!$formField) {
            try {
                $formField = $this->getFileFormField($xpath);
            } catch (DriverException $e) {
                $formField = null;
            }
        }
        if (!$formField) {
            $formField = $this->getTextareaFormField($xpath);
        }

        return $formField;
    }

    /**
     * Returns the checkbox field from xpath query, ensuring it is valid.
     *
     * @param string $xpath
     *
     * @return ChoiceFormField
     *
     * @throws DriverException when the field is not a checkbox
     */
    private function getChoiceFormField($xpath)
    {
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        try {
            $choiceFormField = new ChoiceFormField($element);
        } catch (\LogicException $e) {
            throw new DriverException(
                sprintf(
                    'Impossible to get the element with XPath "%s" as it is not a choice form field. %s',
                    $xpath,
                    $e->getMessage()
                )
            );
        }

        return $choiceFormField;
    }

    /**
     * Returns the input field from xpath query, ensuring it is valid.
     *
     * @param string $xpath
     *
     * @return InputFormField
     *
     * @throws DriverException when the field is not a checkbox
     */
    private function getInputFormField($xpath)
    {
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        try {
            $inputFormField = new InputFormField($element);
        } catch (\LogicException $e) {
            throw new DriverException(
                sprintf('Impossible to check the element with XPath "%s" as it is not an input form field.', $xpath)
            );
        }

        return $inputFormField;
    }

    /**
     * Returns the input field from xpath query, ensuring it is valid.
     *
     * @param string $xpath
     *
     * @return FileFormField
     *
     * @throws DriverException when the field is not a checkbox
     */
    private function getFileFormField($xpath)
    {
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        try {
            $fileFormField = new FileFormField($element);
        } catch (\LogicException $e) {
            throw new DriverException(
                sprintf('Impossible to check the element with XPath "%s" as it is not a file form field.', $xpath)
            );
        }

        return $fileFormField;
    }

    /**
     * Returns the textarea field from xpath query, ensuring it is valid.
     *
     * @param string $xpath
     *
     * @return TextareaFormField
     *
     * @throws DriverException when the field is not a checkbox
     */
    private function getTextareaFormField($xpath)
    {
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));
        try {
            $textareaFormField = new TextareaFormField($element);
        } catch (\LogicException $e) {
            throw new DriverException(
                sprintf('Impossible to check the element with XPath "%s" as it is not a textarea.', $xpath)
            );
        }

        return $textareaFormField;
    }

    /**
     * Returns WebDriverElement from crawler instance.
     *
     * @param Crawler $crawler
     *
     * @return WebDriverElement
     *
     * @throws DriverException when the node does not exist
     */
    private function getCrawlerElement(Crawler $crawler): WebDriverElement
    {
        $node = $crawler->getElement(0);

        if (null !== $node) {
            return $node;
        }

        throw new DriverException('The element does not exist');
    }

    /**
     * Returns a crawler filtered for the given XPath, requiring at least 1 result.
     *
     * @param string $xpath
     *
     * @return Crawler
     *
     * @throws DriverException when no matching elements are found
     */
    private function getFilteredCrawler($xpath): Crawler
    {
        if (!count($crawler = $this->getCrawler()->filterXPath($xpath))) {
            throw new DriverException(sprintf('There is no element matching XPath "%s"', $xpath));
        }

        return $crawler;
    }

    /**
     * Returns crawler instance (got from client).
     *
     * @return Crawler
     *
     * @throws DriverException
     */
    private function getCrawler(): Crawler
    {
        $crawler = $this->getClient()->getCrawler();

        if (null === $crawler) {
            throw new DriverException('Unable to access the response content before visiting a page');
        }

        return $crawler;
    }

    private function getJsNode(string $xpath): string
    {
        return sprintf(
            'document.evaluate(`%s`, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue',
            $xpath
        );
    }

    private function toCoordinates(string $xpath): WebDriverCoordinates
    {
        $element = $this->getCrawlerElement($this->getFilteredCrawler($xpath));

        if (!$element instanceof WebDriverLocatable) {
            throw new \RuntimeException(
                sprintf('The element of "%s" xpath selector does not implement "%s".', $xpath, WebDriverLocatable::class)
            );
        }

        return $element->getCoordinates();
    }

    private function getWebDriverActions(): WebDriverActions
    {
        $webDriver = $this->getClient()->getWebDriver();
        if (!$webDriver instanceof WebDriverHasInputDevices) {
            throw new UnsupportedDriverActionException('Mouse manipulations are not supported by %s', $this);
        }
        $webDriverActions = new WebDriverActions($webDriver);

        return $webDriverActions;
    }

    private function geWebDriverKeyValue($char)
    {
        if (\is_int($char)) {
            $char = \strtolower(\chr($char));
        }

        return $char;
    }

    private function getWebdriverModifierKeyValue(string $modifier = null): ?string
    {
        switch ($modifier) {
            case 'alt':
                $modifier = WebDriverKeys::ALT;
                break;
            case 'ctrl':
                $modifier = WebDriverKeys::CONTROL;
                break;
            case 'shift':
                $modifier = WebDriverKeys::SHIFT;
                break;
            case 'meta':
                $modifier = WebDriverKeys::META;
                break;
            case null:

It seems like you are loosely comparing $modifier of type null|string against null; this is ambiguous if the string can be empty. Consider using a strict comparison === instead.

                break;
            default:
                throw new DriverException(\sprintf('Unsupported modifier "%s" given.', $modifier));
        }

        return $modifier;
    }
}