public string Calculate(string input)
{
// creates a new RegexProcessor
RegexUtil regexProcessing = new RegexUtil();
// creates a new setting ConstantParser
ConstantParser constantSetting = new ConstantParser();
// extract integers
ArrayList integers = regexProcessing.ExtractNums(input);
// extracts operand
string thisOp = regexProcessing.ExtractsOp(input);
// holds answer value
string answer;
// make a new instance of the applicable class per the
// operand extracted
switch (thisOp)
{
case "+":
AddIt thisAddExp = new AddIt();
answer = thisAddExp.Addition(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "-":
SubtractIt thisSubExp = new SubtractIt();
answer = thisSubExp.Subtraction(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "*":
MultiplyIt thisMultiExp = new MultiplyIt();
answer = thisMultiExp.Multiplication(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "/":
DivideIt thisDivExp = new DivideIt();
answer = thisDivExp.Division(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "%":
ModIt thisModExp = new ModIt();
answer = thisModExp.Modulation(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "=":
answer = "Your value has been set";
return answer;
default: throw new ArgumentException("Input doesn't contain an operand understood {0}", thisOp);
}
}
public void GettingConstantValueWorks()
{
Constants.AddKey2Dictionary("y", 6);
RegexUtil TestingRegex = new RegexUtil();
string input = "y + 6";
ArrayList actual = TestingRegex.ExtractNums(input);
ArrayList expected = new ArrayList();
expected.Add(6);
expected.Add(6);
CollectionAssert.AreEqual(expected, actual);
}
public void extractsNumsTest()
{
string input = "3 + 4";
RegexUtil processor = new RegexUtil();
ArrayList answer = processor.ExtractNums(input);
ArrayList expected = new ArrayList();
expected.Add(3);
expected.Add(4);
CollectionAssert.AreEqual(expected, answer);
}
public void DoesNotTakeNoOpPresent()
{
string input = "24";
RegexUtil process = new RegexUtil();
ArrayList answer = process.ExtractNums(input);
}
public void doesNotTakeBadInputWithTwoOps()
{
string input = "3 + %";
RegexUtil processor = new RegexUtil();
ArrayList answer = processor.ExtractNums(input);
}
public void DoesNotTakeBadInput2()
{
string input = "+ 24 5";
RegexUtil processor = new RegexUtil();
ArrayList answer = processor.ExtractNums(input);
}
public void DoesNotTakeAlphabet()
{
string input = "abc + def";
RegexUtil process = new RegexUtil();
ArrayList answer = process.ExtractNums(input);
}