/**
* Checks item in Memcached exists and the same as expected.
*
* @param string $referenceImageIdentifier
* @param null|string $selector
* @throws ModuleException
*/
public function seeNoDifferenceToReferenceImage($referenceImageIdentifier, $selector = null)
{
if ($selector === null) {
$selector = 'body';
}
$elements = $this->webDriver->_findElements($selector);
if (count($elements) == 0) {
throw new ElementNotFound($selector);
} elseif (count($elements) > 1) {
throw new ModuleException(__CLASS__, 'Multiple elements found for given selector "' . $selector . '" but need exactly one element!');
}
/** @var RemoteWebElement $element */
$image = $this->_createScreenshot($referenceImageIdentifier, reset($elements));
$windowSizeString = $this->moduleFileSystemUtil->getCurrentWindowSizeString($this->webDriver);
$referenceImagePath = $this->moduleFileSystemUtil->getReferenceImagePath($referenceImageIdentifier, $windowSizeString);
if (!file_exists($referenceImagePath)) {
// Ensure that the target directory exists
$this->moduleFileSystemUtil->createDirectoryRecursive(dirname($referenceImagePath));
copy($image->getImageFilename(), $referenceImagePath);
$this->currentTestCase->markTestIncomplete('Reference Image does not exist.
Test is skipeed but will now copy reference image to target directory...');
} else {
$referenceImage = new \Imagick($referenceImagePath);
/** @var \Imagick $comparedImage */
list($comparedImage, $difference) = $referenceImage->compareImages($image, \Imagick::METRIC_MEANSQUAREERROR);
$calculatedDifferenceValue = round((double) substr($difference, 0, 6) * 100, 2);
$this->currentTestCase->getScenario()->comment('Difference between reference and current image is around ' . $calculatedDifferenceValue . '%');
if ($calculatedDifferenceValue > $this->config['maxDifference']) {
$failImagePath = $this->moduleFileSystemUtil->getFailImagePath($referenceImageIdentifier, $windowSizeString, 'diff');
$this->moduleFileSystemUtil->createDirectoryRecursive(dirname($failImagePath));
$image->writeImage($this->moduleFileSystemUtil->getFailImagePath($referenceImageIdentifier, $windowSizeString, 'fail'));
$comparedImage->setImageFormat('png');
$comparedImage->writeImage($failImagePath);
$this->fail('Image does not match to the reference image.');
}
}
}