new_contents: #!/usr/bin/python3
  # -*- coding: utf-8 -*-
  # test_environments_worlds.py
  import os
  import sys
  import unittest
  
  root_folder = os.path.abspath(os.path.dirname(os.path.abspath(__file__)) + os.sep + ".." ) 
  pth = root_folder + os.sep + 'vais' 
  
  sys.path.append(pth)
  
  import worlds
  import world_generator
  
  class TestToolboxClsGridLife(unittest.TestCase):
      def setUp(self):
          unittest.TestCase.setUp(self)
  
          
      def tearDown(self):
          unittest.TestCase.tearDown(self)
  
      
      def test_01_run_all(self):
          pass
          world_generator.main()
          self.assertEqual(os.path.exists(os.getcwd() + os.sep + 'test_world_traversed.txt'), True)
          self.assertEqual(os.path.exists(os.getcwd() + os.sep + 'test_world.txt'), True)
  
      def test_02_world_init(self):
          
          num_seeds   =   6   # number of seed points to start land generation
          perc_land   =  20   # % of world that is land
          perc_sea    =  80   # % of world that is sea
          perc_blocked=   4   # % of world that is blocked
          
          myWorld = worlds.World( 22, 44, ['O','P','@'])  # TODO - fix passing
          self.assertEqual(str(myWorld.grd)[0:44], '............................................')
          self.assertEqual('.' in str(myWorld.grd), True)
          self.assertEqual('X' in str(myWorld.grd), False)  # should be all blank before we build 
          self.assertEqual('#' in str(myWorld.grd), False)  # the world using build random
          
          myWorld.build_random( num_seeds, perc_land, perc_sea, perc_blocked)
          #print(myWorld.grd)
          self.assertEqual(myWorld.grd.get_grid_width(), 44)
          self.assertEqual(myWorld.grd.get_grid_height(), 22)
          
          self.assertEqual('.' in str(myWorld.grd), True)
          self.assertEqual('X' in str(myWorld.grd), True)
          self.assertEqual('#' in str(myWorld.grd), True)
  
      def test_03_mountains(self):
          myWorld = worlds.World( 20, 70, ['A','B','@']) 
          myWorld.build_random( 5, 15, 85, 4)
          #print(myWorld.grd)
          self.assertEqual(myWorld.grd.get_grid_width(), 70)
          self.assertEqual(myWorld.grd.get_grid_height(), 20)
          myWorld.add_mountains()
          myWorld.add_new_seed()
          myWorld.add_mountains()
          print(myWorld)
          
   
  
          
  if __name__ == '__main__':
      unittest.main()
subject: test for world module