class DateTimeNormalizerTest

class DateTimeNormalizerTest extends UnitTestCase {
    
    /**
     * The tested data type's normalizer.
     *
     * @var \Drupal\serialization\Normalizer\DateTimeNormalizer
     */
    protected $normalizer;
    
    /**
     * The tested data type.
     *
     * @var \Drupal\Core\TypedData\Type\DateTimeInterface
     */
    protected $data;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $system_date_config = $this->prophesize(ImmutableConfig::class);
        $system_date_config->get('timezone.default')
            ->willReturn('Australia/Sydney');
        $config_factory = $this->prophesize(ConfigFactoryInterface::class);
        $config_factory->get('system.date')
            ->willReturn($system_date_config->reveal());
        $this->normalizer = new DateTimeNormalizer($config_factory->reveal());
        $this->data = $this->prophesize(DateTimeInterface::class);
    }
    
    /**
     * @covers ::supportsNormalization
     */
    public function testSupportsNormalization() : void {
        $this->assertTrue($this->normalizer
            ->supportsNormalization($this->data
            ->reveal()));
        $datetimeiso8601 = $this->prophesize(DateTimeIso8601::class);
        $this->assertTrue($this->normalizer
            ->supportsNormalization($datetimeiso8601->reveal()));
        $integer = $this->prophesize(IntegerData::class);
        $this->assertFalse($this->normalizer
            ->supportsNormalization($integer->reveal()));
    }
    
    /**
     * @covers ::supportsDenormalization
     */
    public function testSupportsDenormalization() : void {
        $this->assertTrue($this->normalizer
            ->supportsDenormalization($this->data
            ->reveal(), DateTimeInterface::class));
    }
    
    /**
     * @covers ::normalize
     */
    public function testNormalize() : void {
        $random_rfc_3339_string = $this->randomMachineName();
        $drupal_date_time = $this->prophesize(DateTimeNormalizerTestDrupalDateTime::class);
        $drupal_date_time->setTimezone(new \DateTimeZone('Australia/Sydney'))
            ->willReturn($drupal_date_time->reveal());
        $drupal_date_time->format(\DateTime::RFC3339)
            ->willReturn($random_rfc_3339_string);
        $this->data
            ->getDateTime()
            ->willReturn($drupal_date_time->reveal());
        $normalized = $this->normalizer
            ->normalize($this->data
            ->reveal());
        $this->assertSame($random_rfc_3339_string, $normalized);
    }
    
    /**
     * @covers ::normalize
     */
    public function testNormalizeWhenNull() : void {
        $this->data
            ->getDateTime()
            ->willReturn(NULL);
        $normalized = $this->normalizer
            ->normalize($this->data
            ->reveal());
        $this->assertNull($normalized);
    }
    
    /**
     * Tests the denormalize function with good data.
     *
     * @covers ::denormalize
     * @dataProvider providerTestDenormalizeValidFormats
     */
    public function testDenormalizeValidFormats($normalized, $expected) : void {
        $denormalized = $this->normalizer
            ->denormalize($normalized, DateTimeInterface::class, NULL, []);
        $this->assertSame(0, $denormalized->getTimestamp() - $expected->getTimestamp());
        $this->assertEquals($expected, $denormalized);
    }
    
    /**
     * Data provider for testDenormalizeValidFormats.
     *
     * @return array
     */
    public static function providerTestDenormalizeValidFormats() {
        $data = [];
        $data['RFC3339'] = [
            '2016-11-06T09:02:00+00:00',
            new \DateTimeImmutable('2016-11-06T09:02:00+00:00'),
        ];
        $data['RFC3339 +0100'] = [
            '2016-11-06T09:02:00+01:00',
            new \DateTimeImmutable('2016-11-06T09:02:00+01:00'),
        ];
        $data['RFC3339 -0600'] = [
            '2016-11-06T09:02:00-06:00',
            new \DateTimeImmutable('2016-11-06T09:02:00-06:00'),
        ];
        $data['ISO8601'] = [
            '2016-11-06T09:02:00+0000',
            new \DateTimeImmutable('2016-11-06T09:02:00+00:00'),
        ];
        $data['ISO8601 +0100'] = [
            '2016-11-06T09:02:00+0100',
            new \DateTimeImmutable('2016-11-06T09:02:00+01:00'),
        ];
        $data['ISO8601 -0600'] = [
            '2016-11-06T09:02:00-0600',
            new \DateTimeImmutable('2016-11-06T09:02:00-06:00'),
        ];
        return $data;
    }
    
    /**
     * Tests the denormalize function with a user supplied format.
     *
     * @covers ::denormalize
     * @dataProvider providerTestDenormalizeUserFormats
     */
    public function testDenormalizeUserFormats($normalized, $format, $expected) : void {
        $denormalized = $this->normalizer
            ->denormalize($normalized, DateTimeInterface::class, NULL, [
            'datetime_allowed_formats' => [
                $format,
            ],
        ]);
        $this->assertSame(0, $denormalized->getTimestamp() - $expected->getTimestamp());
        $this->assertEquals($expected, $denormalized);
    }
    
    /**
     * Data provider for testDenormalizeUserFormats.
     *
     * @return array
     */
    public static function providerTestDenormalizeUserFormats() {
        $data = [];
        $data['Y/m/d H:i:s P'] = [
            '2016/11/06 09:02:00 +00:00',
            'Y/m/d H:i:s P',
            new \DateTimeImmutable('2016-11-06T09:02:00+00:00'),
        ];
        $data['H:i:s Y/m/d P'] = [
            '09:02:00 2016/11/06  +01:00',
            'H:i:s Y/m/d P',
            new \DateTimeImmutable('2016-11-06T09:02:00+01:00'),
        ];
        $data['Y/m/d H:i:s'] = [
            '09:02:00 2016/11/06',
            'H:i:s Y/m/d',
            new \DateTimeImmutable('2016-11-06T09:02:00+11:00'),
        ];
        return $data;
    }
    
    /**
     * Tests the denormalize function with bad data.
     *
     * @covers ::denormalize
     */
    public function testDenormalizeException() : void {
        $this->expectException(UnexpectedValueException::class);
        $this->expectExceptionMessage('The specified date "2016/11/06 09:02am GMT" is not in an accepted format: "Y-m-d\\TH:i:sP" (RFC 3339), "Y-m-d\\TH:i:sO" (ISO 8601).');
        $normalized = '2016/11/06 09:02am GMT';
        $this->normalizer
            ->denormalize($normalized, DateTimeInterface::class, NULL, []);
    }

}