1 // Copyright 2017 Christophe Henry
2 // henry UNDERSCORE christophe AT hotmail DOT com
3 // This is an extended version of the state machine available in the boost::mpl library
4 // Distributed under the same license as the original.
5 // Copyright for the original version:
6 // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
7 // under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
13 #include <boost/msm/back/state_machine.hpp>
15 #include <boost/msm/front/state_machine_def.hpp>
16 #include <boost/msm/front/functor_row.hpp>
18 #include <boost/test/unit_test.hpp>
20 namespace msm = boost::msm;
21 namespace mpl = boost::mpl;
22 using namespace boost::msm::front;
33 // front-end: define the FSM structure
34 struct player_ : public msm::front::state_machine_def<player_>
37 :expected_action_counter(0),expected_action2_counter(0)
39 // The list of FSM states
40 struct State11 : public msm::front::state<>
42 typedef mpl::vector<eventd> deferred_events;
44 template <class Event,class FSM>
45 void on_entry(Event const&,FSM& ) {++entry_counter;}
46 template <class Event,class FSM>
47 void on_exit(Event const&,FSM& ) {++exit_counter;}
51 struct State12 : public msm::front::state<>
53 template <class Event,class FSM>
54 void on_entry(Event const&,FSM& ) {++entry_counter;}
55 template <class Event,class FSM>
56 void on_exit(Event const&,FSM& ) {++exit_counter;}
60 struct State13 : public msm::front::state<>
62 template <class Event,class FSM>
63 void on_entry(Event const&,FSM& ) {++entry_counter;}
64 template <class Event,class FSM>
65 void on_exit(Event const&,FSM& ) {++exit_counter;}
71 template <class EVT,class FSM,class SourceState,class TargetState>
72 void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
74 fsm.template process_event(event2());
77 struct expected_action
79 template <class EVT,class FSM,class SourceState,class TargetState>
80 void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
82 ++fsm.expected_action_counter;
85 struct expected_action2
87 template <class EVT,class FSM,class SourceState,class TargetState>
88 void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
90 ++fsm.expected_action2_counter;
93 // the initial state of the player SM. Must be defined
94 typedef mpl::vector<State11> initial_state;
97 // Transition table for player
98 struct transition_table : mpl::vector<
99 // Start Event Next Action Guard
100 // +---------+-------------+---------+---------------------+----------------------+
101 Row < State11 , event1 , State12 , enqueue_action >,
102 Row < State12 , event2 , State13 , expected_action2 >,
103 Row < State12 , eventd , State13 , expected_action >,
104 Row < State13 , event2 , State11 >,
105 Row < State13 , eventd , State11 >
106 // +---------+-------------+---------+---------------------+----------------------+
109 // Replaces the default no-transition response.
110 template <class FSM,class Event>
111 void no_transition(Event const& , FSM&,int )
113 BOOST_FAIL("no_transition called!");
116 template <class Event,class FSM>
117 void on_entry(Event const&,FSM& fsm)
119 fsm.template get_state<player_::State11&>().entry_counter=0;
120 fsm.template get_state<player_::State11&>().exit_counter=0;
121 fsm.template get_state<player_::State12&>().entry_counter=0;
122 fsm.template get_state<player_::State12&>().exit_counter=0;
123 fsm.template get_state<player_::State13&>().entry_counter=0;
124 fsm.template get_state<player_::State13&>().exit_counter=0;
126 int expected_action_counter;
127 int expected_action2_counter;
130 typedef msm::back::state_machine<player_> player;
132 BOOST_AUTO_TEST_CASE( TestDeferAndMessageQueue2 )
135 // needed to start the highest-level SM. This will call on_entry and mark the start of the SM
138 p.process_event(eventd());
139 BOOST_CHECK_MESSAGE(p.current_state()[0] == 0,"State11 should be active");
140 BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().entry_counter == 1,"State11 entry not called correctly");
142 p.process_event(event1());
143 BOOST_CHECK_MESSAGE(p.current_state()[0] == 0,"State11 should be active");
144 BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().exit_counter == 1,"State11 exit not called correctly");
145 BOOST_CHECK_MESSAGE(p.get_state<player_::State12&>().entry_counter == 1,"State12 entry not called correctly");
146 BOOST_CHECK_MESSAGE(p.get_state<player_::State12&>().exit_counter == 1,"State12 exit not called correctly");
147 BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().entry_counter == 2,"State11 entry not called correctly");
148 BOOST_CHECK_MESSAGE(p.get_state<player_::State13&>().exit_counter == 1,"State13 exit not called correctly");
149 BOOST_CHECK_MESSAGE(p.get_state<player_::State13&>().entry_counter == 1,"State13 entry not called correctly");
150 BOOST_CHECK_MESSAGE(p.expected_action_counter == 1,"expected_action should have been called");
151 BOOST_CHECK_MESSAGE(p.expected_action2_counter == 0,"expected_action2 should not have been called");