def test_life_50(self): l = Life(2,2) c1 = FredkinCell(False) c2 = FredkinCell(False) c3 = FredkinCell(False) c4 = FredkinCell(False) l.addCell(0,0,c1) l.addCell(0,1,c2) l.addCell(1,0,c3) l.addCell(1,1,c4) assert l.getPopulation() == 0