class ProviderRepositoryTest

class ProviderRepositoryTest extends UnitTestCase {
  
  /**
   * The provider repository under test.
   *
   * @var \Drupal\media\OEmbed\ProviderRepository
   */
  private $repository;
  
  /**
   * The HTTP client handler which will serve responses.
   *
   * @var \GuzzleHttp\Handler\MockHandler
   */
  private $responses;
  
  /**
   * The key-value store.
   *
   * @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
   */
  private $keyValue;
  
  /**
   * The time that the current test began.
   *
   * @var int
   */
  private $currentTime;
  
  /**
   * The mocked logger channel.
   *
   * @var \Psr\Log\LoggerInterface|\Prophecy\Prophecy\ObjectProphecy
   */
  private $logger;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $config_factory = $this->getConfigFactoryStub([
      'media.settings' => [
        'oembed_providers_url' => 'https://oembed.com/providers.json',
      ],
    ]);
    $key_value_factory = new KeyValueMemoryFactory();
    $this->keyValue = $key_value_factory->get('media');
    $this->currentTime = time();
    $time = $this->prophesize('\\Drupal\\Component\\Datetime\\TimeInterface');
    $time->getCurrentTime()
      ->willReturn($this->currentTime);
    $this->logger = $this->prophesize('\\Psr\\Log\\LoggerInterface');
    $logger_factory = new LoggerChannelFactory();
    $logger_factory->addLogger($this->logger
      ->reveal());
    $this->responses = new MockHandler();
    $client = new Client([
      'handler' => HandlerStack::create($this->responses),
    ]);
    $this->repository = new ProviderRepository($client, $config_factory, $time->reveal(), $key_value_factory, $logger_factory);
  }
  
  /**
   * Tests that a successful fetch stores the provider database in key-value.
   */
  public function testSuccessfulFetch() : void {
    $body = <<<END
    [
      {
        "provider_name": "YouTube",
        "provider_url": "https:\\/\\/www.youtube.com\\/",
        "endpoints": [
          {
            "schemes": [
              "https:\\/\\/*.youtube.com\\/watch*",
              "https:\\/\\/*.youtube.com\\/v\\/*"
            ],
            "url": "https:\\/\\/www.youtube.com\\/oembed",
            "discovery": true
          }
        ]
      }
    ]
    END;
    $response = new Response(200, [], $body);
    $this->responses
      ->append($response);
    $provider = $this->repository
      ->get('YouTube');
    $stored_data = [
      'data' => [
        'YouTube' => $provider,
      ],
      'expires' => $this->currentTime + 604800,
    ];
    $this->assertSame($stored_data, $this->keyValue
      ->get('oembed_providers'));
  }
  
  /**
   * Tests handling of invalid JSON when fetching the provider database.
   *
   * @param int $expiration_offset
   *   An offset to add to the current time to determine when the primed data,
   *   if any, expires.
   *
   * @dataProvider providerInvalidResponse
   */
  public function testInvalidResponse(int $expiration_offset) : void {
    $provider = $this->prophesize('\\Drupal\\media\\OEmbed\\Provider')
      ->reveal();
    // This stored data should be returned, irrespective of whether it's fresh.
    $this->keyValue
      ->set('oembed_providers', [
      'data' => [
        'YouTube' => $provider,
      ],
      'expires' => $this->currentTime + $expiration_offset,
    ]);
    $response = new Response(200, [], "This certainly isn't valid JSON.");
    $this->responses
      ->append($response, $response);
    $this->assertSame($provider, $this->repository
      ->get('YouTube'));
    // When there is no stored data, we should get an exception.
    $this->keyValue
      ->delete('oembed_providers');
    $this->expectException(ProviderException::class);
    $this->repository
      ->get('YouTube');
  }
  
  /**
   * Data provider for ::testInvalidResponse().
   *
   * @return array[]
   *   Sets of arguments to pass to the test method.
   */
  public function providerInvalidResponse() : array {
    return [
      'expired' => [
        -86400,
      ],
      'fresh' => [
        86400,
      ],
    ];
  }
  
  /**
   * Tests handling of exceptions when fetching the provider database.
   */
  public function testRequestException() : void {
    $provider = $this->prophesize('\\Drupal\\media\\OEmbed\\Provider')
      ->reveal();
    // This data is expired (stale), but it should be returned anyway.
    $this->keyValue
      ->set('oembed_providers', [
      'data' => [
        'YouTube' => $provider,
      ],
      'expires' => $this->currentTime - 86400,
    ]);
    $response = new Response(503);
    $this->responses
      ->append($response, $response);
    $this->assertSame($provider, $this->repository
      ->get('YouTube'));
    // When there is no stored data, we should get an exception.
    $this->keyValue
      ->delete('oembed_providers');
    $this->expectException(ProviderException::class);
    $this->repository
      ->get('YouTube');
  }
  
  /**
   * Tests a successful fetch but with a single corrupt item.
   */
  public function testCorruptProviderIgnored() : void {
    $body = <<<END
    [
      {
        "provider_name": "YouTube",
        "provider_url": "https:\\/\\/www.youtube.com\\/",
        "endpoints": [
          {
            "schemes": [
              "https:\\/\\/*.youtube.com\\/watch*",
              "https:\\/\\/*.youtube.com\\/v\\/*"
            ],
            "url": "https:\\/\\/www.youtube.com\\/oembed",
            "discovery": true
          }
        ]
      },
      {
        "provider_name": "Uncle Rico's football videos",
        "provider_url": "not a real url",
        "endpoints": []
      }
    ]
    END;
    $response = new Response(200, [], $body);
    $this->responses
      ->append($response);
    // The corrupt provider should cause a warning to be logged.
    $this->logger
      ->log(RfcLogLevel::WARNING, "Provider Uncle Rico's football videos does not define a valid external URL.", Argument::type('array'))
      ->shouldBeCalled();
    $youtube = $this->repository
      ->get('YouTube');
    // The corrupt provider should not be stored.
    $stored_data = [
      'data' => [
        'YouTube' => $youtube,
      ],
      'expires' => $this->currentTime + 604800,
    ];
    $this->assertSame($stored_data, $this->keyValue
      ->get('oembed_providers'));
    $this->expectException('InvalidArgumentException');
    $this->repository
      ->get("Uncle Rico's football videos");
  }

}