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, []);
  }

}