Esempio n. 1
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 def test_asynchronous_finisher(self):
     '''make termination action'''
     termination = NullAction(rspec="kill")
     termination.set_nexus(self.nexus)
     alt = MockAlternative(u"my", u"spoken", u"words")
     sira = StackItemRegisteredAction(termination, {"_node":alt})
     
     '''setup function for asynchronous finisher'''
     mutable_integer = {"value": 0}
     def increment():
         mutable_integer["value"] += 1
     
     #
     
     '''make asynchronous action'''
     asynchronous = AsynchronousAction([L(S(["kill"], lambda: None))], 
                                       blocking=False, 
                                       finisher=Function(increment))
     asynchronous.set_nexus(self.nexus)
     '''make StackItemAsynchronous'''
     sia1 = StackItemAsynchronous(asynchronous, {"_node":alt})
     '''add it'''
     self.nexus.state.add(sia1)
     
     #
     
     self.nexus.state.add(sira)
     '''finisher should be executed when asynchronous finishes'''
     self.assertEqual(mutable_integer["value"], 1)
Esempio n. 2
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    def test_asynchronous_finisher(self):
        '''make termination action'''
        termination = NullAction(rspec="kill")
        termination.set_nexus(self.nexus)
        alt = MockAlternative(u"my", u"spoken", u"words")
        sira = StackItemRegisteredAction(termination, {"_node": alt})
        '''setup function for asynchronous finisher'''
        mutable_integer = {"value": 0}

        def increment():
            mutable_integer["value"] += 1

        #
        '''make asynchronous action'''
        asynchronous = AsynchronousAction([L(S(["kill"], lambda: None))],
                                          blocking=False,
                                          finisher=Function(increment))
        asynchronous.set_nexus(self.nexus)
        '''make StackItemAsynchronous'''
        sia1 = StackItemAsynchronous(asynchronous, {"_node": alt})
        '''add it'''
        self.nexus.state.add(sia1)

        #

        self.nexus.state.add(sira)
        '''finisher should be executed when asynchronous finishes'''
        self.assertEqual(mutable_integer["value"], 1)
Esempio n. 3
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 def test_seeker_defaulting_and_chaining(self):
     '''this action makes the first seeker default'''
     action = NullAction(rspec="clean")
     action.set_nexus(self.nexus)
     alt = MockAlternative(u"my", u"spoken", u"words")
     sira = StackItemRegisteredAction(action, {"_node":alt})
     self.nexus.state.add(sira)
     
     #
     
     mutable_integer = {"value": 0}
     def increment():
         mutable_integer["value"] += 1
     
     '''make backward seekers'''
     back_seeker = ContextSeeker(back=[L(S(["def"], Function(lambda: None)), 
                                          S(["abc"], Function(increment)))], rspec="abc")
     back_seeker.set_nexus(self.nexus)
     '''create backward seeker stack items'''
     stack_seeker1 = StackItemSeeker(back_seeker, {"_node":alt})
     stack_seeker2 = StackItemSeeker(back_seeker, {"_node":alt})
     '''add one'''
     self.nexus.state.add(stack_seeker1)
     
     '''at this point, the first seeker should have defaulted and done nothing'''
     self.assertEqual(mutable_integer["value"], 0)
     
     self.nexus.state.add(stack_seeker2)
     '''the second context seeker should have been triggered by the first, incrementing the value'''
     self.assertEqual(mutable_integer["value"], 1)
Esempio n. 4
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    def test_seeker_defaulting_and_chaining(self):
        '''this action makes the first seeker default'''
        action = NullAction(rspec="clean")
        action.set_nexus(self.nexus)
        alt = MockAlternative(u"my", u"spoken", u"words")
        sira = StackItemRegisteredAction(action, {"_node": alt})
        self.nexus.state.add(sira)

        #

        mutable_integer = {"value": 0}

        def increment():
            mutable_integer["value"] += 1

        '''make backward seekers'''
        back_seeker = ContextSeeker(back=[
            L(S(["def"], Function(lambda: None)),
              S(["abc"], Function(increment)))
        ],
                                    rspec="abc")
        back_seeker.set_nexus(self.nexus)
        '''create backward seeker stack items'''
        stack_seeker1 = StackItemSeeker(back_seeker, {"_node": alt})
        stack_seeker2 = StackItemSeeker(back_seeker, {"_node": alt})
        '''add one'''
        self.nexus.state.add(stack_seeker1)
        '''at this point, the first seeker should have defaulted and done nothing'''
        self.assertEqual(mutable_integer["value"], 0)

        self.nexus.state.add(stack_seeker2)
        '''the second context seeker should have been triggered by the first, incrementing the value'''
        self.assertEqual(mutable_integer["value"], 1)
Esempio n. 5
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 def test_defaulting(self):
     self.assertIn("align", self.noderule.mapping_actual())
     self.noderule.mapping_actual()["align"].execute()
     defaulter = NullAction()
     defaulter.set_nexus(self.nexus)
     ''' the noderule should default here and reset '''
     defaulter.execute()
     self.assertIn("align", self.noderule.mapping_actual())
Esempio n. 6
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File: node.py Progetto: seekM/caster
 def test_defaulting(self):
     self.assertIn("align", self.noderule.mapping_actual())
     self.noderule.mapping_actual()["align"].execute()
     defaulter = NullAction()
     defaulter.set_nexus(self.nexus)
     ''' the noderule should default here and reset '''
     defaulter.execute()
     self.assertIn("align", self.noderule.mapping_actual())
Esempio n. 7
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    def test_blocking(self):
        '''tests:
        1 - successful termination (queued actions execute immediately)
        2 - unsuccessful termination (queued actions are dropped)
        3 - cancellation (queued actions are dropped)
        '''

        for i in range(0, 3):
            '''make fake AsynchronousAction'''
            context_set = S(["cancel", "words"], NullAction())
            context_level = L(context_set)
            aa1 = AsynchronousAction([context_level],
                                     blocking=True)  # turn blocking on
            aa1.set_nexus(self.nexus)
            '''make fake StackItemAsynchronous'''
            alt = MockAlternative(u"run", u"blocker")
            sia1 = StackItemAsynchronous(
                aa1, {"_node": alt})  # the dictionary is fake Dragonfly data
            '''add it'''
            self.nexus.state.add(sia1)
            '''blocked function'''
            mutable_integer = {"value": 0}

            def increment():
                mutable_integer["value"] += 1

            '''make fake incrementing RegisteredAction'''
            inc = R(Function(increment), rspec="inc")
            inc.set_nexus(self.nexus)
            '''make fake StackItemRegisteredAction'''
            alt2 = MockAlternative(u"my", u"spoken", u"words")
            sira1 = StackItemRegisteredAction(inc, {"_node": alt2})
            '''add it'''
            self.nexus.state.add(sira1)
            '''incrementing should be blocked at this point'''
            self.assertEqual(mutable_integer["value"], 0)

            if i == 0:
                '''incrementing should happen that moment of unblocking'''
                self.nexus.state.terminate_asynchronous(True)
                self.assertEqual(mutable_integer["value"], 1)
            elif i == 1:
                '''incrementing gets dropped'''
                self.nexus.state.terminate_asynchronous(False)
                self.assertEqual(mutable_integer["value"], 0)
            elif i == 2:
                '''make fake canceling RegisteredAction'''
                cancel = NullAction(rspec="cancel")
                cancel.set_nexus(self.nexus)
                '''make fake StackItemRegisteredAction'''
                alt3 = MockAlternative(u"my", u"cancel", u"words")
                sira2 = StackItemRegisteredAction(cancel, {"_node": alt3})
                '''add it'''
                self.nexus.state.add(sira2)
                '''incrementing gets dropped'''
                self.assertEqual(mutable_integer["value"], 0)
Esempio n. 8
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    def test_blocking(self):
        """tests:
        1 - successful termination (queued actions execute immediately)
        2 - unsuccessful termination (queued actions are dropped)
        3 - cancellation (queued actions are dropped)
        """

        for i in range(0, 3):
            """make fake AsynchronousAction"""
            context_set = S(["cancel", "words"], NullAction())
            context_level = L(context_set)
            aa1 = AsynchronousAction([context_level], blocking=True)  # turn blocking on
            aa1.set_nexus(self.nexus)
            """make fake StackItemAsynchronous"""
            alt = MockAlternative(u"run", u"blocker")
            sia1 = StackItemAsynchronous(aa1, {"_node": alt})  # the dictionary is fake Dragonfly data
            """add it"""
            self.nexus.state.add(sia1)

            """blocked function"""
            mutable_integer = {"value": 0}

            def increment():
                mutable_integer["value"] += 1

            """make fake incrementing RegisteredAction"""
            inc = R(Function(increment), rspec="inc")
            inc.set_nexus(self.nexus)
            """make fake StackItemRegisteredAction"""
            alt2 = MockAlternative(u"my", u"spoken", u"words")
            sira1 = StackItemRegisteredAction(inc, {"_node": alt2})
            """add it"""
            self.nexus.state.add(sira1)
            """incrementing should be blocked at this point"""
            self.assertEqual(mutable_integer["value"], 0)

            if i == 0:
                """incrementing should happen that moment of unblocking"""
                self.nexus.state.terminate_asynchronous(True)
                self.assertEqual(mutable_integer["value"], 1)
            elif i == 1:
                """incrementing gets dropped"""
                self.nexus.state.terminate_asynchronous(False)
                self.assertEqual(mutable_integer["value"], 0)
            elif i == 2:
                """make fake canceling RegisteredAction"""
                cancel = NullAction(rspec="cancel")
                cancel.set_nexus(self.nexus)
                """make fake StackItemRegisteredAction"""
                alt3 = MockAlternative(u"my", u"cancel", u"words")
                sira2 = StackItemRegisteredAction(cancel, {"_node": alt3})
                """add it"""
                self.nexus.state.add(sira2)
                """incrementing gets dropped"""
                self.assertEqual(mutable_integer["value"], 0)
Esempio n. 9
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    def test_seeker_backward(self):
        for i in range(0, 2):
            '''make 2 fake NullActions'''
            trigger1 = NullAction(rspec="bell")
            trigger2 = NullAction(rspec="door")
            trigger1.set_nexus(self.nexus)
            trigger2.set_nexus(self.nexus)
            '''make fake StackItemRegisteredActions'''
            alt2 = MockAlternative(u"my", u"spoken", u"words")
            sira1 = StackItemRegisteredAction(trigger1, {"_node": alt2})
            sira2 = StackItemRegisteredAction(trigger2, {"_node": alt2})
            '''add them'''
            self.nexus.state.add(sira1)
            self.nexus.state.add(sira2)
            '''set up backward looking seeker'''
            mutable_string = {"value": ""}

            def append_a():
                mutable_string["value"] += "a"

            def append_b():
                mutable_string["value"] += "b"

            def append_c():
                mutable_string["value"] += "c"

            def append_d():
                mutable_string["value"] += "d"

            '''create context levels'''
            set_1_1 = S(["arch"], append_a)
            set_1_2 = S(["bell"], append_b)
            level_1 = L(set_1_1, set_1_2)
            set_2_1 = S(["cellar"], append_c)
            set_2_2 = S(["door"], append_d)
            level_2 = L(set_2_1, set_2_2)
            '''create context seeker'''
            levels = [level_1, level_2]
            seeker = ContextSeeker(back=levels)
            if i == 0:
                seeker.reverse = True
            seeker.set_nexus(self.nexus)
            '''create context seeker stack item'''
            alt = MockAlternative(u"my", u"spoken", u"words")
            stack_seeker = StackItemSeeker(seeker, {"_node": alt})
            '''add it'''
            self.nexus.state.add(stack_seeker)

            if i == 0:
                self.assertEqual(mutable_string["value"], "db")
            else:
                self.assertEqual(mutable_string["value"], "bd")
Esempio n. 10
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    def test_seeker_backward(self):
        for i in range(0, 2):
            '''make 2 fake NullActions'''
            trigger1 = NullAction(rspec="bell")
            trigger2 = NullAction(rspec="door")
            trigger1.set_nexus(self.nexus)
            trigger2.set_nexus(self.nexus)
            '''make fake StackItemRegisteredActions'''
            alt2 = MockAlternative(u"my", u"spoken", u"words")
            sira1 = StackItemRegisteredAction(trigger1, {"_node": alt2})
            sira2 = StackItemRegisteredAction(trigger2, {"_node": alt2})
            '''add them'''
            self.nexus.state.add(sira1)
            self.nexus.state.add(sira2)
            '''set up backward looking seeker'''
            mutable_string = {"value": ""}

            def append_a():
                mutable_string["value"] += "a"

            def append_b():
                mutable_string["value"] += "b"

            def append_c():
                mutable_string["value"] += "c"

            def append_d():
                mutable_string["value"] += "d"

            '''create context levels'''
            set_1_1 = S(["arch"], append_a)
            set_1_2 = S(["bell"], append_b)
            level_1 = L(set_1_1, set_1_2)
            set_2_1 = S(["cellar"], append_c)
            set_2_2 = S(["door"], append_d)
            level_2 = L(set_2_1, set_2_2)
            '''create context seeker'''
            levels = [level_1, level_2]
            seeker = ContextSeeker(back=levels)
            if i == 0:
                seeker.reverse = True
            seeker.set_nexus(self.nexus)
            '''create context seeker stack item'''
            alt = MockAlternative(u"my", u"spoken", u"words")
            stack_seeker = StackItemSeeker(seeker, {"_node": alt})
            '''add it'''
            self.nexus.state.add(stack_seeker)

            if i == 0:
                self.assertEqual(mutable_string["value"], "db")
            else:
                self.assertEqual(mutable_string["value"], "bd")
Esempio n. 11
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 def test_use_spoken_words_or_rspec(self):
     '''seekers can take the spoken words or rspecs
     of their trigger actions and feed them to the
     function objects of their ContextSets'''
     
     '''make triggers for context seekers
     (2 forward, 2 backward / 2 spoken, 2 rspec)'''
     action1 = NullAction(rspec="alpha")
     action2 = NullAction(rspec="_")
     action3 = NullAction(rspec="charlie")
     action4 = NullAction(rspec="_")
     action1.set_nexus(self.nexus)
     action2.set_nexus(self.nexus)
     action3.set_nexus(self.nexus)
     action4.set_nexus(self.nexus)
     alt = MockAlternative(u"_")
     spec1 = [u"here", u"are", u"words"]
     spec2 = [u"some", u"more", u"words"]
     sira1 = StackItemRegisteredAction(action1, {"_node":alt})  
     sira2 = StackItemRegisteredAction(action2, {"_node":MockAlternative(*spec1)})
     sira3 = StackItemRegisteredAction(action3, {"_node":alt})
     sira4 = StackItemRegisteredAction(action4, {"_node":MockAlternative(*spec2)})
     
     #
     
     mutable_integer = {"value": 0}
     def increment(): 
         mutable_integer["value"] += 1
     #
     def _1(params):
         if params == "alpha": increment()
     def _2(params):
         if params == spec1: increment()
     def _3(params):
         if params == "charlie": increment()
     def _4(params):
         if params == spec2: increment()
         
     
     '''make seekers'''
     back_seeker1 = ContextSeeker(back=[L(S(["alpha"], _1, parameters="_", use_rspec=True))], rspec="_")
     back_seeker2 = ContextSeeker(back=[L(S(["_"], _2, parameters=["_"], use_spoken=True))], rspec="_")
     forward_seeker1 = ContextSeeker(forward=[L(S(["_"], _3, parameters="_", use_rspec=True))], rspec="_")
     forward_seeker2 = ContextSeeker(forward=[L(S(["delta"], _4, parameters=["_"], use_spoken=True))], rspec="_")
     back_seeker1.set_nexus(self.nexus)
     back_seeker2.set_nexus(self.nexus)
     forward_seeker1.set_nexus(self.nexus)
     forward_seeker2.set_nexus(self.nexus)
     '''create seeker stack items'''
     stack_seeker_b1 = StackItemSeeker(back_seeker1, {"_node":alt})
     stack_seeker_b2 = StackItemSeeker(back_seeker2, {"_node":alt})
     stack_seeker_f1 = StackItemSeeker(forward_seeker1, {"_node":alt})
     stack_seeker_f2 = StackItemSeeker(forward_seeker2, {"_node":alt})
     
     #
             
     '''trigger the first backward seeker; uses rspec ("alpha") '''
     self.nexus.state.add(sira1)
     self.nexus.state.add(stack_seeker_b1)
     self.assertEqual(mutable_integer["value"], 1)
     
     '''trigger the second backward seeker; uses spoken words (spec1) '''
     self.nexus.state.add(sira2)
     self.nexus.state.add(stack_seeker_b2)
     self.assertEqual(mutable_integer["value"], 2)
     
     '''trigger the first forward seeker; uses rspec ("charlie") '''
     self.nexus.state.add(stack_seeker_f1)
     self.nexus.state.add(sira3)        
     self.assertEqual(mutable_integer["value"], 3)
     
     '''trigger the first forward seeker; uses spoken words (spec2) '''
     self.nexus.state.add(stack_seeker_f2)
     self.nexus.state.add(sira4)        
     self.assertEqual(mutable_integer["value"], 4)
Esempio n. 12
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    def test_actions_cleaned(self):
        '''these test functions should stay in sync with the clean methods for each stack action'''
        def registered_is_clean(r):
            return r.dragonfly_data is None and r.base is None
        def seeker_is_clean(s):
            result = True
            levels = []
            if s.back is not None: levels += s.back
            if s.forward is not None: levels += s.forward
            for context_level in levels:
                result &= context_level.dragonfly_data is None
            return result
        def asynchronous_is_clean(a):
            return a.closure is None
        
        '''mock words being the same doesn't matter for this test, or most tests'''
        alt = MockAlternative(u"my", u"spoken", u"words")
        
        '''make fake NullActions'''
        action1 = NullAction(rspec="barkley")
        action2 = NullAction(rspec="gaiden")
        action3 = NullAction(rspec="is")
        action4 = NullAction(rspec="awesome")
        action1.set_nexus(self.nexus)
        action2.set_nexus(self.nexus)
        action3.set_nexus(self.nexus)
        action4.set_nexus(self.nexus)
        '''make fake StackItemRegisteredActions'''
        sira1 = StackItemRegisteredAction(action1, {"_node":alt})
        sira2 = StackItemRegisteredAction(action2, {"_node":alt})
        sira3 = StackItemRegisteredAction(action3, {"_node":alt})
        sira4 = StackItemRegisteredAction(action4, {"_node":alt})
        
        '''should not be clean before it's executed'''
        self.assertFalse(registered_is_clean(sira1))
        
        '''add first one for backward seeker'''
        self.nexus.state.add(sira1)
        
        '''should be clean as soon as it's executed'''
        self.assertTrue(registered_is_clean(sira1))
        
        '''make backward seeker'''
        back_seeker = ContextSeeker(back=[L(S(["minecraft"], Function(lambda: None)))])
        back_seeker.set_nexus(self.nexus)
        '''create backward seeker stack item'''
        stack_seeker = StackItemSeeker(back_seeker, {"_node":alt})
        '''add it'''
        self.nexus.state.add(stack_seeker)
        
        '''levels should be clean as soon as it's executed'''
        self.assertTrue(registered_is_clean(stack_seeker) and seeker_is_clean(stack_seeker))
        
        #
        
        '''make forward seeker'''
        forward_seeker = ContextSeeker(forward=[L(S(["cave"], Function(lambda: None))), 
                                                L(S(["story"], Function(lambda: None)))])
        forward_seeker.set_nexus(self.nexus)
        '''create context seeker stack item'''
        stack_seeker2 = StackItemSeeker(forward_seeker, {"_node":alt})
        '''add it'''
        self.nexus.state.add(stack_seeker2)
    
        self.nexus.state.add(sira2)
        '''levels should not be clean before seeker is executed'''
        self.assertFalse(registered_is_clean(stack_seeker2) or seeker_is_clean(stack_seeker2))

        self.nexus.state.add(sira3)
        '''levels should be clean as soon as it's executed'''
        self.assertTrue(registered_is_clean(stack_seeker2) and seeker_is_clean(stack_seeker2))
        
        #
        
        '''make asynchronous action'''
        asynchronous = AsynchronousAction([L(S(["eternal", "daughter", "awesome"], lambda: None))], 
                                          blocking=False)
        asynchronous.set_nexus(self.nexus)
        '''make StackItemAsynchronous'''
        sia1 = StackItemAsynchronous(asynchronous, {"_node":alt})
        '''add it'''
        self.nexus.state.add(sia1)
        
        '''closure should not be clean before asynchronous is executed'''
        self.assertFalse(registered_is_clean(sia1) or seeker_is_clean(sia1) or asynchronous_is_clean(sia1))
        
        self.nexus.state.add(sira4)
        
        '''closure should be clean after asynchronous is executed'''
        self.assertTrue(registered_is_clean(sia1) and seeker_is_clean(sia1) and asynchronous_is_clean(sia1))
Esempio n. 13
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    def test_use_spoken_words_or_rspec(self):
        '''seekers can take the spoken words or rspecs
        of their trigger actions and feed them to the
        function objects of their ContextSets'''
        '''make triggers for context seekers
        (2 forward, 2 backward / 2 spoken, 2 rspec)'''
        action1 = NullAction(rspec="alpha")
        action2 = NullAction(rspec="_")
        action3 = NullAction(rspec="charlie")
        action4 = NullAction(rspec="_")
        action1.set_nexus(self.nexus)
        action2.set_nexus(self.nexus)
        action3.set_nexus(self.nexus)
        action4.set_nexus(self.nexus)
        alt = MockAlternative(u"_")
        spec1 = [u"here", u"are", u"words"]
        spec2 = [u"some", u"more", u"words"]
        sira1 = StackItemRegisteredAction(action1, {"_node": alt})
        sira2 = StackItemRegisteredAction(action2,
                                          {"_node": MockAlternative(*spec1)})
        sira3 = StackItemRegisteredAction(action3, {"_node": alt})
        sira4 = StackItemRegisteredAction(action4,
                                          {"_node": MockAlternative(*spec2)})

        #

        mutable_integer = {"value": 0}

        def increment():
            mutable_integer["value"] += 1

        #
        def _1(params):
            if params == "alpha": increment()

        def _2(params):
            if params == spec1: increment()

        def _3(params):
            if params == "charlie": increment()

        def _4(params):
            if params == spec2: increment()

        '''make seekers'''
        back_seeker1 = ContextSeeker(
            back=[L(S(["alpha"], _1, parameters="_", use_rspec=True))],
            rspec="_")
        back_seeker2 = ContextSeeker(
            back=[L(S(["_"], _2, parameters=["_"], use_spoken=True))],
            rspec="_")
        forward_seeker1 = ContextSeeker(
            forward=[L(S(["_"], _3, parameters="_", use_rspec=True))],
            rspec="_")
        forward_seeker2 = ContextSeeker(
            forward=[L(S(["delta"], _4, parameters=["_"], use_spoken=True))],
            rspec="_")
        back_seeker1.set_nexus(self.nexus)
        back_seeker2.set_nexus(self.nexus)
        forward_seeker1.set_nexus(self.nexus)
        forward_seeker2.set_nexus(self.nexus)
        '''create seeker stack items'''
        stack_seeker_b1 = StackItemSeeker(back_seeker1, {"_node": alt})
        stack_seeker_b2 = StackItemSeeker(back_seeker2, {"_node": alt})
        stack_seeker_f1 = StackItemSeeker(forward_seeker1, {"_node": alt})
        stack_seeker_f2 = StackItemSeeker(forward_seeker2, {"_node": alt})

        #
        '''trigger the first backward seeker; uses rspec ("alpha") '''
        self.nexus.state.add(sira1)
        self.nexus.state.add(stack_seeker_b1)
        self.assertEqual(mutable_integer["value"], 1)
        '''trigger the second backward seeker; uses spoken words (spec1) '''
        self.nexus.state.add(sira2)
        self.nexus.state.add(stack_seeker_b2)
        self.assertEqual(mutable_integer["value"], 2)
        '''trigger the first forward seeker; uses rspec ("charlie") '''
        self.nexus.state.add(stack_seeker_f1)
        self.nexus.state.add(sira3)
        self.assertEqual(mutable_integer["value"], 3)
        '''trigger the first forward seeker; uses spoken words (spec2) '''
        self.nexus.state.add(stack_seeker_f2)
        self.nexus.state.add(sira4)
        self.assertEqual(mutable_integer["value"], 4)
Esempio n. 14
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    def test_actions_cleaned(self):
        '''these test functions should stay in sync with the clean methods for each stack action'''
        def registered_is_clean(r):
            return r.dragonfly_data is None and r.base is None

        def seeker_is_clean(s):
            result = True
            levels = []
            if s.back is not None: levels += s.back
            if s.forward is not None: levels += s.forward
            for context_level in levels:
                result &= context_level.dragonfly_data is None
            return result

        def asynchronous_is_clean(a):
            return a.closure is None

        '''mock words being the same doesn't matter for this test, or most tests'''
        alt = MockAlternative(u"my", u"spoken", u"words")
        '''make fake NullActions'''
        action1 = NullAction(rspec="barkley")
        action2 = NullAction(rspec="gaiden")
        action3 = NullAction(rspec="is")
        action4 = NullAction(rspec="awesome")
        action1.set_nexus(self.nexus)
        action2.set_nexus(self.nexus)
        action3.set_nexus(self.nexus)
        action4.set_nexus(self.nexus)
        '''make fake StackItemRegisteredActions'''
        sira1 = StackItemRegisteredAction(action1, {"_node": alt})
        sira2 = StackItemRegisteredAction(action2, {"_node": alt})
        sira3 = StackItemRegisteredAction(action3, {"_node": alt})
        sira4 = StackItemRegisteredAction(action4, {"_node": alt})
        '''should not be clean before it's executed'''
        self.assertFalse(registered_is_clean(sira1))
        '''add first one for backward seeker'''
        self.nexus.state.add(sira1)
        '''should be clean as soon as it's executed'''
        self.assertTrue(registered_is_clean(sira1))
        '''make backward seeker'''
        back_seeker = ContextSeeker(
            back=[L(S(["minecraft"], Function(lambda: None)))])
        back_seeker.set_nexus(self.nexus)
        '''create backward seeker stack item'''
        stack_seeker = StackItemSeeker(back_seeker, {"_node": alt})
        '''add it'''
        self.nexus.state.add(stack_seeker)
        '''levels should be clean as soon as it's executed'''
        self.assertTrue(
            registered_is_clean(stack_seeker)
            and seeker_is_clean(stack_seeker))

        #
        '''make forward seeker'''
        forward_seeker = ContextSeeker(forward=[
            L(S(["cave"], Function(lambda: None))),
            L(S(["story"], Function(lambda: None)))
        ])
        forward_seeker.set_nexus(self.nexus)
        '''create context seeker stack item'''
        stack_seeker2 = StackItemSeeker(forward_seeker, {"_node": alt})
        '''add it'''
        self.nexus.state.add(stack_seeker2)

        self.nexus.state.add(sira2)
        '''levels should not be clean before seeker is executed'''
        self.assertFalse(
            registered_is_clean(stack_seeker2)
            or seeker_is_clean(stack_seeker2))

        self.nexus.state.add(sira3)
        '''levels should be clean as soon as it's executed'''
        self.assertTrue(
            registered_is_clean(stack_seeker2)
            and seeker_is_clean(stack_seeker2))

        #
        '''make asynchronous action'''
        asynchronous = AsynchronousAction(
            [L(S(["eternal", "daughter", "awesome"], lambda: None))],
            blocking=False)
        asynchronous.set_nexus(self.nexus)
        '''make StackItemAsynchronous'''
        sia1 = StackItemAsynchronous(asynchronous, {"_node": alt})
        '''add it'''
        self.nexus.state.add(sia1)
        '''closure should not be clean before asynchronous is executed'''
        self.assertFalse(
            registered_is_clean(sia1) or seeker_is_clean(sia1)
            or asynchronous_is_clean(sia1))

        self.nexus.state.add(sira4)
        '''closure should be clean after asynchronous is executed'''
        self.assertTrue(
            registered_is_clean(sia1) and seeker_is_clean(sia1)
            and asynchronous_is_clean(sia1))