public void NotIsInGrid(Direction direction, int expectedX, int expectedY)
        {
            // Arrange
            var startPos = new Coord(2, 0);
            var sit      = new GridNavigator();

            // Act
            var result = sit.CheckDirection(grid, startPos, direction);

            var(x, y) = result.NewPosition;
            // Assert
            result.IsInGrid.Should().BeFalse();
            x.Should().Be(expectedX);
            y.Should().Be(expectedY);
            result.NewValue.Should().BeNull();
        }