protected ImmutableState(ImmutableState prev, ushort addr, ushort value)
{
_memory = prev._memory;
_regs = prev._regs;
_memoryMap = prev._memoryMap;
var deviceId = prev._memoryMap[addr];
if (deviceId == null) {
_memory = _memory.Set(addr, value);
_deviceStates = prev._deviceStates;
} else {
_deviceStates = new Dictionary<string, DeviceState>(prev._deviceStates);
_deviceStates[deviceId] = prev._deviceStates[deviceId].Write(addr, value);
}
}
public void GetAndSet_ManyElementArray_CorrectElementsReturned()
{
var array = new PersistentArray<int>(100);
for (int i=0; i < 100; ++i) {
array = array.Set(i, 2 * i);
}
for (int i=0; i < 100; ++i) {
Assert.AreEqual(2 * i, array[i]);
}
var array2 = array;
for (int i=0; i < 100; ++i) {
array2 = array2.Set(i, array[99 - i]);
}
for (int i=99; i >= 0; --i) {
Assert.AreEqual(2 * i, array2[99 - i]);
}
}
public void Set_LengthOneArray_OldValueIdentical()
{
var array = new PersistentArray<string>(1);
var array2 = array.Set(0, "foo");
Assert.AreEqual(null, array[0]);
}
public void Set_LengthOneArray_NewValueCorrect()
{
var array = new PersistentArray<string>(1);
var array2 = array.Set(0, "foo");
Assert.AreEqual("foo", array2[0]);
}