public void TestDivZero()
{
IRPNCalculator cal = new RPNCalculator();
Assert.True(cal.Size() == 0);
cal.Push(0);
cal.Push(5);
Assert.Throws <ArgumentException>(() => cal.Divide());
cal.Add();
Assert.True(cal.Size() == 1);
}
public void TestDiv(double a, double b, double res)
{
IRPNCalculator c = new RPNCalculator();
Assert.True(c.Size() == 0);
c.Push(a);
c.Push(b);
Assert.True(c.Size() == 2 && c.Top() == b);
c.Divide();
Assert.True(c.Size() == 1 && c.Top() == res);
}