public void AssembleGeneratesCorrectValueIfOperandIsSecondOperand()
{
var operand = new NextWordOperand { NextWord = 0x20 };
const int Index = 1;
const ushort Shift = (ushort)(OpcodeWidth + (Index * OperandWidth));
Assert.That(
operand.AssembleOperand(Index), Is.EqualTo((ushort)((ushort)OperandType.ONextWord << Shift)));
}
public void NoOpIncrementsProgramCounter()
{
var cpuStateManager = new Mock<ICpuStateOperations>();
var operand = new NextWordOperand();
cpuStateManager.Setup(m => m.IncrementProgramCounter()).Returns(0x1);
operand.NoOp(cpuStateManager.Object);
cpuStateManager.VerifyAll();
}
public void ReadIncrementsProgramCounterAndReturnMemoryValuePointedByProgramCounter()
{
var cpuStateManager = new Mock<ICpuStateOperations>();
var operand = new NextWordOperand();
cpuStateManager.Setup(m => m.IncrementProgramCounter()).Returns(0x1);
cpuStateManager.Setup(m => m.ReadValueAtProgramCounter()).Returns(0x10);
var nextWordValue = operand.Read(cpuStateManager.Object);
operand.Read(cpuStateManager.Object);
Assert.That(nextWordValue, Is.EqualTo(0x10));
}
public void AssembleGeneratesCorrectValueIfNextWordLessThan32AndOperandIsFirstOperand()
{
var operand = new NextWordOperand { NextWord = 0x10 };
const int Index = 0;
const ushort Shift = (ushort)(OpcodeWidth + (Index * OperandWidth));
Assert.That(
operand.AssembleOperand(Index), Is.EqualTo((ushort)((0x10 + OperandLiteralOffset) << Shift)));
}
public void ToStringReturnsOperandStringRepresentation()
{
var operand = new NextWordOperand();
Assert.That(operand.ToString(), Is.EqualTo("NW"));
}