public function testGetIterator()
 {
     $coordsArray = ['A1', 'J10', 'J1', 'B2', 'A10'];
     $coordsCollection = new CoordsCollection($coordsArray);
     $this->assertInstanceOf('\\ArrayIterator', $coordsCollection->getIterator());
     $this->assertEquals(count($coordsArray), $coordsCollection->getIterator()->count());
 }
 /**
  * @param Event $event
  * @return CoordsCollection
  */
 private function getAttackerShots(Event $event)
 {
     $shotEvents = $this->eventRepository->findForGameByTypeAndPlayer($event->getGame(), Event::TYPE_SHOT, $event->getPlayer());
     $attackerShots = new CoordsCollection();
     foreach ($shotEvents as $shotEvent) {
         $attackerShots->append($shotEvent->getValue());
     }
     return $attackerShots;
 }
 /**
  * @param CoordsCollection $shipsCollection
  * @throws InvalidShipsException
  */
 private function validateShipsTypes(CoordsCollection $shipsCollection)
 {
     // sizes of ships to be count
     $shipsTypes = [1 => 0, 2 => 0, 3 => 0, 4 => 0];
     // B3 (index 12), going 2 down and 3 left is D6 (index 35), so 12 + (2 * 10) + (3 * 1) = 35
     $directionOffsets = [CoordsManager::OFFSET_RIGHT, CoordsManager::OFFSET_BOTTOM];
     $checkedCoordsCollection = new CoordsCollection();
     foreach ($shipsCollection as $shipCoords) {
         // we ignore masts which have already been marked as a part of a ship
         if ($checkedCoordsCollection->contains($shipCoords)) {
             continue;
         }
         $shipLength = 1;
         foreach ($directionOffsets as $offset) {
             $checkCoords = $this->coordsManager->getByOffset($shipCoords, $offset);
             // check for masts until the battleground border is reached
             while ($shipsCollection->contains($checkCoords)) {
                 // ship is too long
                 if (++$shipLength > self::MAX_SHIP_LENGTH) {
                     throw new InvalidShipsException(sprintf('Ships can\'t have more than %d masts', self::MAX_SHIP_LENGTH));
                 }
                 // mark the mast as already checked
                 $checkedCoordsCollection->append($checkCoords);
                 $checkCoords = $this->coordsManager->getByOffset($checkCoords, $offset);
             }
             // masts found so don't look for more
             if ($shipLength > 1) {
                 break;
             }
         }
         $shipsTypes[$shipLength]++;
     }
     // whether the number of different ship types is correct
     $diff = array_diff_assoc($shipsTypes, [1 => 4, 2 => 3, 3 => 2, 4 => 1]);
     if (!empty($diff)) {
         throw new InvalidShipsException('Number of ships\' types is incorrect');
     }
 }