public void InstructionTableStoresAddedInstructions()
{
InstructionTable table = new InstructionTable();
Instruction instructionA = new Instruction();
instructionA.State = "A";
table.AddInstruction(instructionA);
Assert.AreEqual(instructionA, table.GetInstruction(instructionA.State));
}
public void InstructionTableAddsToWriteSymbolsIf2InstructionsHaveTheSameState()
{
InstructionTable table = new InstructionTable();
Instruction instructionA1 = new Instruction();
instructionA1.State = "A";
instructionA1.WriteSymbols['0'] = '1';
Instruction instructionA2 = new Instruction();
instructionA2.State = "A";
instructionA2.WriteSymbols['1'] = '0';
table.AddInstruction(instructionA1);
table.AddInstruction(instructionA2);
Instruction storedInstruction = table.GetInstruction("A");
Assert.AreEqual(2, storedInstruction.WriteSymbols.Keys.Count);
Assert.AreEqual('1', storedInstruction.WriteSymbols['0']);
Assert.AreEqual('0', storedInstruction.WriteSymbols['1']);
}
public void InstructionTableAddsToNextStatesIf2InstructionsHaveTheSameState()
{
InstructionTable table = new InstructionTable();
Instruction instructionA1 = new Instruction();
instructionA1.State = "A";
instructionA1.NextStates['0'] = "B";
Instruction instructionA2 = new Instruction();
instructionA2.State = "A";
instructionA2.NextStates['1'] = "C";
table.AddInstruction(instructionA1);
table.AddInstruction(instructionA2);
Instruction storedInstruction = table.GetInstruction("A");
Assert.AreEqual(2, storedInstruction.NextStates.Keys.Count);
Assert.AreEqual("B", storedInstruction.NextStates['0']);
Assert.AreEqual("C", storedInstruction.NextStates['1']);
}
public void InstructionTableAddsToMoveDirectionsIf2InstructionsHaveTheSameState()
{
InstructionTable table = new InstructionTable();
Instruction instructionA1 = new Instruction();
instructionA1.State = "A";
instructionA1.MoveDirections['0'] = MoveDirection.Left;
Instruction instructionA2 = new Instruction();
instructionA2.State = "A";
instructionA2.MoveDirections['1'] = MoveDirection.Right;
table.AddInstruction(instructionA1);
table.AddInstruction(instructionA2);
Instruction storedInstruction = table.GetInstruction("A");
Assert.AreEqual(2, storedInstruction.MoveDirections.Keys.Count);
Assert.AreEqual(MoveDirection.Left, storedInstruction.MoveDirections['0']);
Assert.AreEqual(MoveDirection.Right, storedInstruction.MoveDirections['1']);
}
public void InstructionTableThrowsExceptionOnNullInstructions()
{
InstructionTable table = new InstructionTable();
table.AddInstruction(null);
}
private static IInstructionTable ParseInstructions(string[] args)
{
String filename = "./instructions.tbl";
if (args.Length >= 1)
{
filename = args[0];
}
Console.Title = "Turing Machine - " + Path.GetFileNameWithoutExtension(filename);
String[] instructionLines = File.ReadAllLines(filename);
IInstructionTable table = new InstructionTable();
foreach (String instructionLine in instructionLines)
{
table.AddInstruction(InstructionParser.Parse(instructionLine));
}
return table;
}