public void Execute_PlusThreeToZero_ReturnsThree()
{
AddInstruction instruction = new AddInstruction(3);
var expectedOutput = 3;
Assert.AreEqual(expectedOutput, instruction.Execute(0));
}
public void Execute_NegativeNumber()
{
reg[9] = 0x3;
reg[10] = 0xFFFFFFFF;
target = new AddInstruction(8, 9, 10);
target.Execute(ref pc, mem, reg);
Assert.AreEqual(0x2, reg[8]);
Assert.AreEqual(0x4, pc);
}
public void Execute_Overflow()
{
reg[9] = 0xFFFFFFFF;
reg[10] = 0x1;
target = new AddInstruction(8, 9, 10);
target.Execute(ref pc, mem, reg);
Assert.AreEqual(0x0, reg[8]);
Assert.AreEqual(0x4, pc);
}
public void Execute_PositiveNumbers()
{
reg[9] = 0x1;
reg[10] = 0x3;
target = new AddInstruction(8, 9, 10);
target.Execute(ref pc, mem, reg);
Assert.AreEqual(0x4, reg[8]);
Assert.AreEqual(0x4, pc);
}