def test_bad_state(self):
S1 = State("S1")
S2 = State("S2")
S1.add_transition(Transition("S1->S2", None, S2, 100))
S1.add_transition(Transition("S1->S2", None, S2, 50))
self.assertRaises(BadState, S1.build_pdf)
def test_simple_state_machine(self):
# This state machine will generate even length strings of the form
# (AB|AC)* or odd length strings of the form (AB|AC)* | (A|)
S1 = State("S1")
S2 = State("S2")
regex = re.compile("^(AB|AC|)+(A|)$")
self._str = ""
def appendA():
self._str += "A"
def appendB():
self._str += "B"
def appendC():
self._str += "C"
S1.add_transition(Transition("S1->S2", appendA, S2, 100))
S2.add_transition(Transition("S2->S1", appendB, S1, 50))
S2.add_transition(Transition("S2->S1", appendC, S1, 50))
S1.build_pdf()
S2.build_pdf()
generator = StateMachine("Gen", S1)
for x in xrange(1000):
generator.transition()
# Verify that the State machine generates a correct regex
assert_that(regex.match(self._str), not_none())
# Verify that there isnt a transition from B to C
assert_that("BC" in self._str, is_(False))
assert_that("CB" in self._str, is_(False))