def test_Field_getUnknownTile(self):
field = Field(100,100)
tile = field.getTile(1,2)
self.assertIsNotNone(tile)
def test_Field_setTile(self):
field = Field(100, 100)
tile = Tile()
field.setTile(3,4, tile)
self.assertEqual(tile, field.getTile(3, 4))