class DrupalDateTimeTest

class DrupalDateTimeTest extends UnitTestCase {
    
    /**
     * Tests date diffs.
     *
     * @param mixed $input1
     *   A DrupalDateTime object.
     * @param mixed $input2
     *   Date argument for DrupalDateTime::diff method.
     * @param bool $absolute
     *   Absolute flag for DrupalDateTime::diff method.
     * @param \DateInterval $expected
     *   The expected result of the DrupalDateTime::diff operation.
     *
     * @dataProvider providerTestDateDiff
     */
    public function testDateDiff($input1, $input2, $absolute, \DateInterval $expected) : void {
        $interval = $input1->diff($input2, $absolute);
        $this->assertEquals($interval, $expected);
    }
    
    /**
     * Tests date diff exception caused by invalid input.
     *
     * @param mixed $input1
     *   A DateTimePlus object.
     * @param mixed $input2
     *   Date argument for DateTimePlus::diff method.
     * @param bool $absolute
     *   Absolute flag for DateTimePlus::diff method.
     *
     * @dataProvider providerTestInvalidDateDiff
     */
    public function testInvalidDateDiff($input1, $input2, $absolute) : void {
        $this->expectException(\BadMethodCallException::class);
        $this->expectExceptionMessage('Method Drupal\\Component\\Datetime\\DateTimePlus::diff expects parameter 1 to be a \\DateTime or \\Drupal\\Component\\Datetime\\DateTimePlus object');
        $interval = $input1->diff($input2, $absolute);
    }
    
    /**
     * Provides data for date tests.
     *
     * @return array
     *   An array of arrays, each containing the input parameters for
     *   DrupalDateTimeTest::testDateDiff().
     *
     * @see DrupalDateTimeTest::testDateDiff()
     */
    public static function providerTestDateDiff() {
        $settings = [
            'langcode' => 'en',
        ];
        $utc_tz = new \DateTimeZone('UTC');
        $empty_interval = new \DateInterval('PT0S');
        $positive_19_hours = new \DateInterval('PT19H');
        $positive_18_hours = new \DateInterval('PT18H');
        $positive_1_hour = new \DateInterval('PT1H');
        $negative_1_hour = new \DateInterval('PT1H');
        $negative_1_hour->invert = 1;
        return [
            // There should be a 19 hour time interval between
            // new years in Sydney and new years in LA in year 2000.
[
                'input2' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '2000-01-01 00:00:00', new \DateTimeZone('Australia/Sydney'), $settings),
                'input1' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '2000-01-01 00:00:00', new \DateTimeZone('America/Los_Angeles'), $settings),
                'absolute' => FALSE,
                'expected' => $positive_19_hours,
            ],
            // In 1970 Sydney did not observe daylight savings time
            // So there is only an 18 hour time interval.
[
                'input2' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '1970-01-01 00:00:00', new \DateTimeZone('Australia/Sydney'), $settings),
                'input1' => DrupalDateTime::createFromFormat('Y-m-d H:i:s', '1970-01-01 00:00:00', new \DateTimeZone('America/Los_Angeles'), $settings),
                'absolute' => FALSE,
                'expected' => $positive_18_hours,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, new \DateTimeZone('America/Los_Angeles'), $settings),
                'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
                'absolute' => FALSE,
                'expected' => $negative_1_hour,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
                'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
                'absolute' => FALSE,
                'expected' => $negative_1_hour,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
                'input2' => \DateTime::createFromFormat('U', '0'),
                'absolute' => FALSE,
                'expected' => $negative_1_hour,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
                'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
                'absolute' => TRUE,
                'expected' => $positive_1_hour,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
                'input2' => \DateTime::createFromFormat('U', '0'),
                'absolute' => TRUE,
                'expected' => $positive_1_hour,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
                'input2' => DrupalDateTime::createFromFormat('U', 0, $utc_tz, $settings),
                'absolute' => FALSE,
                'expected' => $empty_interval,
            ],
        ];
    }
    
    /**
     * Provides data for date tests.
     *
     * @return array
     *   An array of arrays, each containing the input parameters for
     *   DateTimePlusTest::testInvalidDateDiff().
     *
     * @see DateTimePlusTest::testInvalidDateDiff()
     */
    public static function providerTestInvalidDateDiff() {
        $settings = [
            'langcode' => 'en',
        ];
        $utc_tz = new \DateTimeZone('UTC');
        return [
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
                'input2' => '1970-01-01 00:00:00',
                'absolute' => FALSE,
            ],
            [
                'input1' => DrupalDateTime::createFromFormat('U', 3600, $utc_tz, $settings),
                'input2' => NULL,
                'absolute' => FALSE,
            ],
        ];
    }
    
    /**
     * Tests setting the default time for date-only objects.
     */
    public function testDefaultDateTime() : void {
        $utc = new \DateTimeZone('UTC');
        $date = DrupalDateTime::createFromFormat('Y-m-d H:i:s', '2017-05-23 22:58:00', $utc, [
            'langcode' => 'en',
        ]);
        $this->assertEquals('22:58:00', $date->format('H:i:s'));
        $date->setDefaultDateTime();
        $this->assertEquals('12:00:00', $date->format('H:i:s'));
    }
    
    /**
     * Tests that object methods are chainable.
     *
     * @covers ::__call
     */
    public function testChainable() : void {
        $tz = new \DateTimeZone(date_default_timezone_get());
        $date = new DrupalDateTime('now', $tz, [
            'langcode' => 'en',
        ]);
        $date->setTimestamp(12345678);
        $rendered = $date->render();
        $this->assertEquals('1970-05-24 07:21:18 Australia/Sydney', $rendered);
        $date->setTimestamp(23456789);
        $rendered = $date->setTimezone(new \DateTimeZone('America/New_York'))
            ->render();
        $this->assertEquals('1970-09-29 07:46:29 America/New_York', $rendered);
    }
    
    /**
     * Tests that non-chainable methods work.
     *
     * @covers ::__call
     */
    public function testChainableNonChainable() : void {
        $tz = new \DateTimeZone(date_default_timezone_get());
        $datetime1 = new DrupalDateTime('2009-10-11 12:00:00', $tz, [
            'langcode' => 'en',
        ]);
        $datetime2 = new DrupalDateTime('2009-10-13 12:00:00', $tz, [
            'langcode' => 'en',
        ]);
        $interval = $datetime1->diff($datetime2);
        $this->assertInstanceOf(\DateInterval::class, $interval);
        $this->assertEquals('+2 days', $interval->format('%R%a days'));
    }
    
    /**
     * Tests that chained calls to non-existent functions throw an exception.
     *
     * @covers ::__call
     */
    public function testChainableNonCallable() : void {
        $this->expectException(\BadMethodCallException::class);
        $this->expectExceptionMessage('Call to undefined method Drupal\\Core\\Datetime\\DrupalDateTime::nonexistent()');
        $tz = new \DateTimeZone(date_default_timezone_get());
        $date = new DrupalDateTime('now', $tz, [
            'langcode' => 'en',
        ]);
        $date->setTimezone(new \DateTimeZone('America/New_York'))
            ->nonexistent();
    }
    
    /**
     * @covers ::getPhpDateTime
     */
    public function testGetPhpDateTime() : void {
        $new_york = new \DateTimeZone('America/New_York');
        $berlin = new \DateTimeZone('Europe/Berlin');
        // Test retrieving a cloned copy of the wrapped \DateTime object, and that
        // altering it does not change the DrupalDateTime object.
        $drupal_date_time = DrupalDateTime::createFromFormat('Y-m-d H:i:s', '2017-07-13 22:40:00', $new_york, [
            'langcode' => 'en',
        ]);
        $this->assertEquals(1500000000, $drupal_date_time->getTimestamp());
        $this->assertEquals('America/New_York', $drupal_date_time->getTimezone()
            ->getName());
        $datetime = $drupal_date_time->getPhpDateTime();
        $this->assertInstanceOf('DateTime', $datetime);
        $this->assertEquals(1500000000, $datetime->getTimestamp());
        $this->assertEquals('America/New_York', $datetime->getTimezone()
            ->getName());
        $datetime->setTimestamp(1400000000)
            ->setTimezone($berlin);
        $this->assertEquals(1400000000, $datetime->getTimestamp());
        $this->assertEquals('Europe/Berlin', $datetime->getTimezone()
            ->getName());
        $this->assertEquals(1500000000, $drupal_date_time->getTimestamp());
        $this->assertEquals('America/New_York', $drupal_date_time->getTimezone()
            ->getName());
    }
    
    /**
     * Tests that an RFC2822 formatted date always returns an English string.
     *
     * @see http://www.faqs.org/rfcs/rfc2822.html
     *
     * @covers ::format
     */
    public function testRfc2822DateFormat() : void {
        $language_manager = $this->createMock(LanguageManager::class);
        $language_manager->expects($this->any())
            ->method('getCurrentLanguage')
            ->willReturn(new Language([
            'id' => $this->randomMachineName(2),
        ]));
        $container = new ContainerBuilder();
        $container->set('language_manager', $language_manager);
        \Drupal::setContainer($container);
        $time = '2019-02-02T13:30';
        $timezone = new \DateTimeZone('Europe/Berlin');
        $langcodes = array_keys(LanguageManager::getStandardLanguageList());
        $langcodes[] = NULL;
        foreach ($langcodes as $langcode) {
            $datetime = new DrupalDateTime($time, $timezone, [
                'langcode' => $langcode,
            ]);
            // Check that RFC2822 format date is returned regardless of langcode.
            $this->assertEquals('Sat, 02 Feb 2019 13:30:00 +0100', $datetime->format('r'));
        }
    }
    
    /**
     * Test to avoid serialization of formatTranslationCache.
     */
    public function testSleep() : void {
        $tz = new \DateTimeZone(date_default_timezone_get());
        $date = new DrupalDateTime('now', $tz, [
            'langcode' => 'en',
        ]);
        // Override timestamp before serialize.
        $date->setTimestamp(12345678);
        $vars = $date->__sleep();
        $this->assertContains('langcode', $vars);
        $this->assertContains('dateTimeObject', $vars);
        $this->assertNotContains('formatTranslationCache', $vars);
        $unserialized_date = unserialize(serialize($date));
        $this->assertSame(12345678, $unserialized_date->getTimestamp());
    }

}