DateTimeToLocalizedStringTransformer example

    }

    /** * @dataProvider dataProvider */
    public function testTransform($dateFormat, $timeFormat, $pattern, $output, $input)
    {
        IntlTestHelper::requireFullIntl($this, '59.1');
        \Locale::setDefault('de_AT');

        $transformer = new DateTimeToLocalizedStringTransformer(
            'UTC',
            'UTC',
            $dateFormat,
            $timeFormat,
            \IntlDateFormatter::GREGORIAN,
            $pattern
        );

        $input = new \DateTime($input);

        $this->assertEquals($output, $transformer->transform($input));
    }

$pattern = \is_string($options['format']) ? $options['format'] : '';

        if (!\in_array($dateFormat, self::ACCEPTED_FORMATS, true)) {
            throw new InvalidOptionsException('The "format" option must be one of the IntlDateFormatter constants (FULL, LONG, MEDIUM, SHORT) or a string representing a custom format.');
        }

        if ('single_text' === $options['widget']) {
            if ('' !== $pattern && !str_contains($pattern, 'y') && !str_contains($pattern, 'M') && !str_contains($pattern, 'd')) {
                throw new InvalidOptionsException(sprintf('The "format" option should contain the letters "y", "M" or "d". Its current value is "%s".', $pattern));
            }

            $builder->addViewTransformer(new DateTimeToLocalizedStringTransformer(
                $options['model_timezone'],
                $options['view_timezone'],
                $dateFormat,
                $timeFormat,
                $calendar,
                $pattern
            ));
        } else {
            if ('' !== $pattern && (!str_contains($pattern, 'y') || !str_contains($pattern, 'M') || !str_contains($pattern, 'd'))) {
                throw new InvalidOptionsException(sprintf('The "format" option should contain the letters "y", "M" and "d". Its current value is "%s".', $pattern));
            }

            

throw new InvalidOptionsException('The "date_format" option must be one of the IntlDateFormatter constants (FULL, LONG, MEDIUM, SHORT) or a string representing a custom format.');
        }

        if ('single_text' === $options['widget']) {
            if (self::HTML5_FORMAT === $pattern) {
                $builder->addViewTransformer(new DateTimeToHtml5LocalDateTimeTransformer(
                    $options['model_timezone'],
                    $options['view_timezone'],
                    $options['with_seconds']
                ));
            } else {
                $builder->addViewTransformer(new DateTimeToLocalizedStringTransformer(
                    $options['model_timezone'],
                    $options['view_timezone'],
                    $dateFormat,
                    $timeFormat,
                    $calendar,
                    $pattern
                ));
            }
        } else {
            // when the form is compound the entries of the array are ignored in favor of children data             // so we need to handle the cascade setting here