/// <summary>
        /// Get character for each board fields based by information if user hits that field
        /// and if on the field was one of ship squares that was hit by user
        /// </summary>
        /// <param name="boardField"><see cref="BoardFieldModel"/></param>
        /// <returns></returns>
        private char GetBoardFieldIcon(BoardFieldModel boardField)
        {
            var boardFieldIcon = NotCheckedFieldIcon;

            if (boardField.WasHit)
            {
                boardFieldIcon = (boardField.IsNotEmpty) ? CheckedAndEmptyFieldIcon : CheckedAndNotEmptyFieldIcon;
            }

            return(boardFieldIcon);
        }
        private void CheckIfIsNotEmptyIsInCorrectState(ShipModel shipModel, bool isTrue)
        {
            BoardFieldModel boardFieldModel = new BoardFieldModel(shipModel);

            boardFieldModel.IsNotEmpty.Should().Be(isTrue);
        }