class MemoryTest(unittest.TestCase):
MEM_SIZE = 4096
MEM_VALUE = 0xFF
MEM_ADDRESS = 0x10
MEM_ADDRESS_WRONG_LOW = -1
MEM_ADDRESS_WRONG_HIGH = 4906
def setUp(self):
self.memory = Memory(self.MEM_SIZE)
def tearDown(self):
pass
def testShouldReadCorrectBytes(self):
self.memory.setByte(self.MEM_ADDRESS, self.MEM_VALUE)
byte = self.memory.getByte(self.MEM_ADDRESS)
self.assertEqual(byte, self.MEM_VALUE)
def testShouldWriteCorrectBytes(self):
self.memory.setByte(self.MEM_ADDRESS, self.MEM_VALUE)
byte = self.memory.getByte(self.MEM_ADDRESS)
self.assertEqual(byte, self.MEM_VALUE)
def testShouldRaiseErrorOnIllegalMemoryAddressWrite(self):
with self.assertRaises(IndexError):
self.memory.setByte(self.MEM_ADDRESS_WRONG_LOW, self.MEM_VALUE)
with self.assertRaises(IndexError):
self.memory.setByte(self.MEM_ADDRESS_WRONG_HIGH, self.MEM_VALUE)
def testShouldRaiseErrorOnIllegalMemoryAddressRead(self):
with self.assertRaises(IndexError):
self.memory.getByte(self.MEM_ADDRESS_WRONG_LOW)
with self.assertRaises(IndexError):
self.memory.getByte(self.MEM_ADDRESS_WRONG_HIGH)
def testShouldReserveEnoughMemory(self):
self.assertEqual(len(self.memory.memory), self.MEM_SIZE)
