public void And(byte a, byte b, byte expected)
{
var expectedFlags = new FlagRegister(expected == 0, false, true, false);
var reg = new Register <byte> {
Value = a
};
var flags = new FlagRegister();
Instructions.And(reg, b, flags);
Assert.AreEqual(expected, reg.Value);
AssertFlags(expectedFlags, flags);
}