Symfony\Component\Form\ValueTransformer\DateTimeToLocalizedStringTransformer::reverseTransform PHP Method

    public function reverseTransform($value, $originalValue)
    {
        $inputTimezone = $this->getOption('input_timezone');

        if (!is_string($value)) {
            throw new \InvalidArgumentException(sprintf('Expected argument of type string, %s given', gettype($value)));
        }

        if ($value === '') {
            return null;
        }

        $timestamp = $this->getIntlDateFormatter()->parse($value);

        if (intl_get_error_code() != 0) {
            throw new TransformationFailedException(intl_get_error_message());
        }

        // read timestamp into DateTime object - the formatter delivers in UTC
        $dateTime = new \DateTime(sprintf('@%s UTC', $timestamp));

        if ($inputTimezone != 'UTC') {
            $dateTime->setTimezone(new \DateTimeZone($inputTimezone));
        }

        return $dateTime;
    }

 public function testReverseTransformWrapsIntlErrors()
 {
     $transformer = new DateTimeToLocalizedStringTransformer();
     $this->setExpectedException('Symfony\\Component\\Form\\ValueTransformer\\TransformationFailedException');
     $transformer->reverseTransform('12345', null);
 }