def test_jms_scenario1(address12):
"""Test JMS instruction functionality."""
chip_test = Processor()
chip_base = Processor()
# Simulate conditions at end of instruction in base chip
chip_base.PROGRAM_COUNTER = 300
chip_base.write_to_stack(chip_base.PROGRAM_COUNTER + 2)
chip_base.PROGRAM_COUNTER = address12 - 1
# Set up conditions in test chip
chip_test.PROGRAM_COUNTER = 300
# Perform the instruction under test:
# Jump to a subroutine
Processor.jms(chip_test, address12)
# Make assertions that the base chip is now at the same state as
# the test chip which has been operated on by the instruction under test.
assert chip_test.PROGRAM_COUNTER == address12 - 1
assert chip_test.STACK_POINTER == 1
assert chip_test.STACK[chip_test.STACK_POINTER + 1] == 302 # Return
# Pickling each chip and comparing will show equality or not.
assert pickle.dumps(chip_test) == pickle.dumps(chip_base)
def test_jms_scenario2(address12):
"""Test JMS instruction failure."""
chip_test = Processor()
# Simulate conditions at START of operation in base chip
# chip should have not had any changes as the operations will fail
# N/A
# Simulate conditions at END of operation in test chip
# chip should have not had any changes as the operations will fail
# N/A
# attempting to use an invalid value
with pytest.raises(Exception) as e:
assert Processor.jms(chip_test, address12)
assert str(e.value) == ' Value: ' + str(address12)
assert e.type == ValueOutOfRangeForStack
