function testForwardTransform()
{
$maze = new Maze(2, 2);
$this->assertEquals($maze->forwardTransform('N'), 'E');
$this->assertEquals($maze->forwardTransform('E'), 'N');
$this->assertEquals($maze->forwardTransform('S'), 'W');
$this->assertEquals($maze->forwardTransform('W'), 'S');
}
