@Test
	public void testMinus(){
		//ReversePolishNotationCalculator calculator = new ReversePolishNotationCalculator();
		calculator.pushOperand(3);
		calculator.pushOperand(2.0);
		System.out.println(calculator.operandsToString());
		calculator.pushMinusOperator();
		System.out.println(calculator.operatorsToString());
		calculator.evaluateStack();
		System.out.println(calculator.operandsToString());
		assertEquals(1.0, calculator.popOperand(), 0);
		
	}