def test_next_step_invalid_opcode_UnknownOpcodeException(self):
# arrange
sut = Vm()
sut.rom = [255]
# act
action = sut.next_step
# assert
self.assertRaises(UnknownOpCodeException, action)
def text_next_step_everything_okay(self):
# arrange
sut = Vm()
sut.rom = [7, 7, 7]
# action
sut.next_step()
# assert
self.assertEqual(sut.program_count, 1)
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_jump_invalid_target(self):
# arrange
sut = Vm()
sut.program_count = 1
sut.rom = [sut.OPC_NOP, sut.OPC_JUMP, 3]
# act
action = sut.next_step
# assert
self.assertRaises(InvalidPcException, action)
def test_jump(self):
# arrange
sut = Vm()
sut.program_count = 1
sut.rom = [sut.OPC_NOP, sut.OPC_JUMP, 0]
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 0)
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_next_step_pc_negative_InvalidPcException(self):
# arrange
sut = Vm()
sut.rom = [7, 7, 7]
sut.program_count = -1
# act
action = sut.next_step
# assert
self.assertRaises(InvalidPcException, action)
def test_next_step_pc_larger_than_rom_InvalidPcException(self):
# arrange
sut = Vm()
sut.rom = [7, 7, 7]
sut.program_count = 4
# act
action = sut.next_step
# assert
self.assertRaises(InvalidPcException, action)
def test_load(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_LOAD, 42, sut.OPC_NOP]
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 2)
self.assertEqual(sut.accumulator, 42)
def test_jumpa_invalid_target(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_NOP, sut.OPC_NOP, sut.OPC_JUMPA]
sut.accumulator = 5
sut.program_count = 2
# act
action = sut.next_step
# assert
self.assertRaises(InvalidPcException, action)
def test_jumpa(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_NOP, sut.OPC_NOP, sut.OPC_JUMPA]
sut.accumulator = 1
sut.program_count = 2
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 1)
def test_jumpn_invalid_target_dont_fail(self):
# arrange
sut = Vm()
sut.accumulator = 4
sut.rom = [sut.OPC_NOP, sut.OPC_JUMPN, 4, sut.OPC_NOP]
sut.program_count = 1
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 3)
def test_jumpn_dont_jump(self):
# arrange
sut = Vm()
sut.accumulator = 1
sut.rom = [sut.OPC_NOP, sut.OPC_JUMPN, 0, sut.OPC_NOP]
sut.program_count = 1
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 3)
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_jumpn_invalid_target_fail(self):
# arrange
sut = Vm()
sut.accumulator = -4
sut.rom = [sut.OPC_NOP, sut.OPC_JUMPN, 4, sut.OPC_NOP]
sut.program_count = 1
# act
action = sut.next_step
# assert
self.assertRaises(InvalidPcException, action)
def test_copyto_direct(self):
# arrange
sut = Vm()
sut.accumulator = 42
sut.rom = [sut.OPC_COPYTO, 2, sut.OPC_NOP]
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 2)
self.assertEqual(sut.accumulator, 42)
self.assertEqual(sut.ram[2], 42)
def main():
vm = Vm(ram_size=10)
vm.rom = [8, 0, 8, 1, 10, 2, 16, 0]
#vm.rom = [2,11,5,0, 2,13,5,1, 2,-20,5,2, # load initial
# 2,2,5,4, # load 2 to [4]
# 9,4, # incr [[4]]
# 10,4, # decr [4]
# 18,12, # jumpn 12
# 16,16] # jump 16
data = readbin(sys.argv[1])
vm.rom = data
vm.ostream_subscribers.append(ostream_emulation)
while (True):
print_vm(vm)
#input("enter for next step")
time.sleep(0.1)
vm.next_step()
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_ldpc(self):
# arrange
sut = Vm()
sut.rom = [sut.OPC_NOP, sut.OPC_LDPC, sut.OPC_NOP]
sut.program_count = 1
sut.accumulator = -4
# act
sut.next_step()
# assert
self.assertEqual(sut.accumulator, 1)
self.assertEqual(sut.program_count, 2)
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])
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_push_outbox(self):
# arrange
mock_store = [-143] # random number
def mock(x):
mock_store[0] = x
sut = Vm()
sut.rom = [sut.OPC_OUTBOX, sut.OPC_NOP]
sut.ostream_subscribers.append(mock)
sut.accumulator = 42
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 1)
self.assertEqual(sut.accumulator, 0)
self.assertEqual(mock_store[0], 42) # mock called
def test_pop_inbox(self):
# arrange
mock_store = [-111] # random number
def mock(x):
mock_store[0] = x
sut = Vm()
sut.rom = [sut.OPC_INBOX, sut.OPC_NOP]
sut.istream.put(42)
sut.istream_subscribers.append(mock)
# act
sut.next_step()
# assert
self.assertEqual(sut.program_count, 1)
self.assertEqual(sut.accumulator, 42)
self.assertEqual(mock_store[0], 42) # mock called