public static IInstruction Create(char instruction, TapeMemory tapeMemory, BrainmessProgram program)
{
IInstruction iInstruction = null;
switch (instruction)
{
case '>':
iInstruction = new ForwardInstruction(tapeMemory, program);
break;
case '<':
iInstruction = new BackwardInstruction(tapeMemory, program);
break;
case '+':
iInstruction = new IncreamentInstruction(tapeMemory, program);
break;
case '-':
iInstruction = new DecreamentInstruction(tapeMemory, program);
break;
case '.':
iInstruction = new OutputInstruction(tapeMemory, program);
break;
case ',':
iInstruction = new InputInstruction(tapeMemory, program);
break;
case '[':
iInstruction = new LoopForwardInstruction(tapeMemory, program);
break;
case ']':
iInstruction = new LoopBackwardInstruction(tapeMemory, program);
break;
}
return iInstruction;
}
public void TestBackwardInstruction()
{
var backwardInstruction = new BackwardInstruction
(
new TapeMemory(),
new BrainmessProgram
{
Instructions = "<"
}
);
backwardInstruction.Execute();
Assert.AreEqual(0, backwardInstruction.TapeMemory.CurrentPointer);
}
