class MemoryBackendTest

class MemoryBackendTest extends UnitTestCase {
  
  /**
   * The tested memory flood backend.
   *
   * @var \Drupal\Core\Flood\MemoryBackend
   */
  protected $flood;
  protected function setUp() : void {
    parent::setUp();
    $request = new RequestStack();
    $request_mock = $this->getMockBuilder(Request::class)
      ->onlyMethods([
      'getClientIp',
    ])
      ->getMock();
    $request->push($request_mock);
    $this->flood = new MemoryBackend($request);
  }
  
  /**
   * Tests an allowed flood event.
   */
  public function testAllowedProceeding() : void {
    $threshold = 2;
    $window_expired = -1;
    $this->flood
      ->register('test_event', $window_expired);
    $this->assertTrue($this->flood
      ->isAllowed('test_event', $threshold));
  }
  
  /**
   * Tests a flood event with more than the allowed calls.
   */
  public function testNotAllowedProceeding() : void {
    $threshold = 1;
    $window_expired = -1;
    // Register the event twice, so it is not allowed to proceed.
    $this->flood
      ->register('test_event', $window_expired);
    $this->flood
      ->register('test_event', $window_expired, 1);
    $this->assertFalse($this->flood
      ->isAllowed('test_event', $threshold));
  }
  
  /**
   * Tests a flood event with expiring, so cron will allow to proceed.
   */
  public function testExpiring() : void {
    $threshold = 1;
    $window_expired = -1;
    $this->flood
      ->register('test_event', $window_expired);
    usleep(2);
    $this->flood
      ->register('test_event', $window_expired);
    $this->assertFalse($this->flood
      ->isAllowed('test_event', $threshold));
    // "Run cron", which clears the flood data and verify event is now allowed.
    $this->flood
      ->garbageCollection();
    $this->assertTrue($this->flood
      ->isAllowed('test_event', $threshold));
  }
  
  /**
   * Tests a flood event with no expiring, so cron will not allow to proceed.
   */
  public function testNotExpiring() : void {
    $threshold = 2;
    $this->flood
      ->register('test_event', 1);
    usleep(3);
    $this->flood
      ->register('test_event', 1);
    $this->assertFalse($this->flood
      ->isAllowed('test_event', $threshold));
    // "Run cron", which clears the flood data and verify event is not allowed.
    $this->flood
      ->garbageCollection();
    $this->assertFalse($this->flood
      ->isAllowed('test_event', $threshold));
  }
  
  /**
   * Tests memory backend records events to the nearest microsecond.
   */
  public function testMemoryBackendThreshold() : void {
    $this->flood
      ->register('new event');
    $this->assertTrue($this->flood
      ->isAllowed('new event', '2'));
    $this->flood
      ->register('new event');
    $this->assertFalse($this->flood
      ->isAllowed('new event', '2'));
  }

}