public void Executing_Instruction_8xy7_WithVx_SetToVF_ThrowsException()
{
var cpu = new Cpu();
var decodedInstruction = new DecodedInstruction(0x8FB7);
var instruction = new Instruction_8xy7(decodedInstruction);
Assert.Throws <InvalidOperationException>(() => instruction.Execute(cpu, MockedDisplay, MockedKeyboard));
}
public void Executing_Instruction_8xy7_WorksAsExpected(byte value1, byte value2, byte expectedResult, byte expectedVF)
{
var cpu = new Cpu();
var decodedInstruction = new DecodedInstruction(0x8AB7);
cpu.V[decodedInstruction.x] = value1;
cpu.V[decodedInstruction.y] = value2;
var instruction = new Instruction_8xy7(decodedInstruction);
instruction.Execute(cpu, MockedDisplay, MockedKeyboard);
Assert.That(cpu.V[decodedInstruction.x], Is.EqualTo(expectedResult));
Assert.That(cpu.V[0xF], Is.EqualTo(expectedVF));
Assert.That(instruction.Mnemonic, Is.EqualTo($"SUBN V{decodedInstruction.x:X}, V{decodedInstruction.y:X}"));
}
