public void ParseInstruction(
string rawInstruction,
string registerToModify,
OperationType operation,
int amount,
string conditionRegister,
OperandType conditionOperand,
int conditionAmount)
{
var instruction = new RegisterInstruction(rawInstruction);
instruction.RegisterToModify.Should().Be(registerToModify);
instruction.Operation.Should().Be(operation);
instruction.Amount.Should().Be(amount);
instruction.ConditionRegister.Should().Be(conditionRegister);
instruction.ConditionOperand.Should().Be(conditionOperand);
instruction.ConditionAmount.Should().Be(conditionAmount);
}
private static void RunInstructionOnRegister(IDictionary <string, int> registers, RegisterInstruction instruction)
{
if (!registers.ContainsKey(instruction.RegisterToModify))
{
registers.Add(instruction.RegisterToModify, 0);
}
if (!registers.ContainsKey(instruction.ConditionRegister))
{
registers.Add(instruction.ConditionRegister, 0);
}
bool conditionMet;
switch (instruction.ConditionOperand)
{
case OperandType.GreaterThan:
conditionMet = registers[instruction.ConditionRegister] > instruction.ConditionAmount;
break;
case OperandType.LessThan:
conditionMet = registers[instruction.ConditionRegister] < instruction.ConditionAmount;
break;
case OperandType.GreaterThanOrEqualTo:
conditionMet = registers[instruction.ConditionRegister] >= instruction.ConditionAmount;
break;
case OperandType.LessThanOrEqualTo:
conditionMet = registers[instruction.ConditionRegister] <= instruction.ConditionAmount;
break;
case OperandType.EqualTo:
conditionMet = registers[instruction.ConditionRegister] == instruction.ConditionAmount;
break;
case OperandType.NotEqualTo:
conditionMet = registers[instruction.ConditionRegister] != instruction.ConditionAmount;
break;
default:
throw new ArgumentOutOfRangeException();
}
if (conditionMet)
{
switch (instruction.Operation)
{
case OperationType.Increase:
registers[instruction.RegisterToModify] += instruction.Amount;
break;
case OperationType.Decrease:
registers[instruction.RegisterToModify] -= instruction.Amount;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}