def test_bumpdwn_indirect_invalid_adress(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_BUMPDWN_I, 3, sut.OPC_NOP]
sut.ram = [1, 2, 3, 4]
# act
action = sut.next_step
# assert
self.assertRaises(InvalidRamAdressException, action)
def test_copyfrom_direct_invalid_adress(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_COPYFROM, 4, sut.OPC_NOP]
sut.ram = [1, 2, 3, 4]
# act
action = sut.next_step
# assert
self.assertRaises(InvalidRamAdressException, action)
def test_sub_indirect_invalid_adress(self):
# arrange
sut = Vm()
sut.accumulator = 1
sut.rom = [sut.OPC_SUB_I, 2, sut.OPC_NOP]
sut.ram = [1, 2, 3]
# act
action = sut.next_step
# assert
self.assertRaises(InvalidRamAdressException, action)
def test_sub_indirect(self):
# arrange
sut = Vm()
sut.accumulator = 1
sut.rom = [sut.OPC_SUB_I, 0, sut.OPC_NOP]
sut.ram = [1, 2, 3]
# act
sut.next_step()
# assert
self.assertEqual(sut.accumulator, -1)
def test_add_direct(self):
# arrange
sut = Vm()
sut.accumulator = 1
sut.rom = [sut.OPC_ADD, 0, sut.OPC_NOP]
sut.ram = [1, 2, 3]
# act
sut.next_step()
# assert
self.assertEqual(sut.accumulator, 2)
def test_copyfrom_indirect(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_COPYFROM_I, 2, sut.OPC_NOP]
sut.ram = [1, 2, 3, 4]
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 2)
self.assertEqual(sut.accumulator, 4)
self.assertEqual(sut.ram, [1, 2, 3, 4])
def test_bumpdwn_indirect(self):
# arrange
sut = Vm()
sut.accumulator = 42
sut.ram = [1, 2, 3, 4]
sut.rom = [sut.OPC_BUMPDWN_I, 2, sut.OPC_NOP]
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 2)
self.assertEqual(sut.accumulator, 3)
self.assertEqual(sut.ram, [1, 2, 3, 3])
def test_nop(self):
# arrange
sut = Vm()
sut.accumulator = 42
sut.ram = [1, 2, 3, 4]
sut.rom = [sut.OPC_NOP, sut.OPC_NOP]
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 1)
self.assertEqual(sut.accumulator, 42)
self.assertEqual(sut.ram, [1, 2, 3, 4])