def test_consume():
alphabet = ["a", "b", "c", "d"]
states = ["1", "2", "3"]
table = TransitionTable(alphabet, states)
table.add_transition("a", "1", "2")
table.add_transition("b", "1", "3")
table.add_transition("c", "1", "1")
next_state = table.consume("a", "1")
assert next_state == "2", "expect '2', get {}".format(next_state)
next_state = table.consume("b", "1")
assert next_state == "3", "expect '3', get {}".format(next_state)
# test InvalidTransition
try:
# invalid symbol
table.consume("q", "1")
except InvalidTransition:
pass
try:
# invalid state
table.consume("a", "4")
except InvalidTransition:
pass
# testing DeadSate
try:
table.consume("d", "1")
except DeadState:
pass
def test_consume():
alphabet = ["a", "b", "c", "d"]
states = ["1", "2", "3"]
table = TransitionTable(alphabet, states)
table.add_transition("a", "1", "2")
table.add_transition("b", "1", "3")
table.add_transition("c", "1", "1")
next_state = table.consume("a", "1")
assert next_state == "2", "expect '2', get {}".format(next_state)
next_state = table.consume("b", "1")
assert next_state == "3", "expect '3', get {}".format(next_state)
# test InvalidTransition
try:
# invalid symbol
table.consume("q", "1")
except InvalidTransition:
pass
try:
# invalid state
table.consume("a", "4")
except InvalidTransition:
pass
# testing DeadSate
try:
table.consume("d", "1")
except DeadState:
pass
