public void ZeroExeption()
 {
     ParseTreeClass checkTree = new ParseTreeClass("(/ 8 0)");
     checkTree.CalculateAll();
 }
 public void Initialize()
 {
     tree = new ParseTreeClass("(-(+ 5 5)(* 7 1))");
 }
 public void WrongSymbolExeption()
 {
     ParseTreeClass checkTree = new ParseTreeClass("(/ 8 k)");
     checkTree.CalculateAll();
 }
 public void EmptyExeption()
 {
     ParseTreeClass checkTree = new ParseTreeClass("");
     checkTree.CalculateAll();
 }