public override string ToString()
{
// one of base numbers
if (operand == MyNumberOperators.NONE)
{
return(currentValue.ToString());
}
char c = operatorChars[(short)operand];
if (operand == MyNumberOperators.SUB && right.HasSubOperand())
{
return(string.Format("{0} {1} ({2})", left.ToString(), c, right.ToString()));
}
else if (operand == MyNumberOperators.MULTIPLY || operand == MyNumberOperators.DIVIDE)
{
if (left.operand == MyNumberOperators.ADD || left.operand == MyNumberOperators.SUB)
{
if (right.operand == MyNumberOperators.ADD || right.operand == MyNumberOperators.SUB)
{
return(string.Format("({0}) {1} ({2})", left.ToString(), c, right.ToString()));
}
else
{
return(string.Format("({0}) {1} {2}", left.ToString(), c, right.ToString()));
}
}
else if (right.operand == MyNumberOperators.ADD || right.operand == MyNumberOperators.SUB)
{
return(string.Format("{0} {1} ({2})", left.ToString(), c, right.ToString()));
}
}
return(string.Format("{0} {1} {2}", left.ToString(), c, right.ToString()));
}
public void FindSolution_ShouldReturnResult(int number, int[] numbers, string expression, int result)
{
MyNumberItem myItem = engine.FindSolution(number, numbers);
Assert.IsNotNull(myItem);
Assert.AreEqual(result, myItem.currentValue);
Assert.AreEqual(expression, myItem.ToString());
}