public void Prefix_ValidExpression_CorrectResult()
{
// arrange
string input = "-+*23*549";
ExpressionParser parser = new ExpressionParser();
// act
int result = parser.Prefix(input);
// assert
Assert.AreEqual(17, result);
}
public void Prefix_ShortValidExpression_CorrectResult()
{
// arrange
string input = "+*123";
ExpressionParser parser = new ExpressionParser();
// act
int result = parser.Prefix(input);
// assert
Assert.AreEqual(5, result);
}