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// Copyright 2010 Christophe Henry
// henry UNDERSCORE christophe AT hotmail DOT com
// This is an extended version of the state machine available in the boost::mpl library
// Distributed under the same license as the original.
// Copyright for the original version:
// Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
// under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <iostream>
// back-end
#include <boost/msm/back/state_machine.hpp>
#include <boost/msm/front/euml/euml.hpp>
#ifndef BOOST_MSM_NONSTANDALONE_TEST
#define BOOST_TEST_MODULE MyTest
#endif
#include <boost/test/unit_test.hpp>
namespace msm = boost::msm;
using namespace boost::msm::front::euml;
namespace
{
// events
BOOST_MSM_EUML_EVENT(event1)
// The list of FSM states
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,entry_counter)
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,exit_counter)
BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State1)
BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State2)
BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State3)
BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State4)
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,state2_to_state3_counter)
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,state3_to_state4_counter)
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,always_true_counter)
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,always_false_counter)
// transition actions
BOOST_MSM_EUML_ACTION(State2ToState3)
{
template <class FSM,class EVT,class SourceState,class TargetState>
void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
{
++fsm.get_attribute(state2_to_state3_counter);
}
};
BOOST_MSM_EUML_ACTION(State3ToState4)
{
template <class FSM,class EVT,class SourceState,class TargetState>
void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
{
++fsm.get_attribute(state3_to_state4_counter);
}
};
// guard conditions
BOOST_MSM_EUML_ACTION(always_true)
{
template <class FSM,class EVT,class SourceState,class TargetState>
bool operator()(EVT const&,FSM& fsm,SourceState& ,TargetState& )
{
++fsm.get_attribute(always_true_counter);
return true;
}
};
BOOST_MSM_EUML_ACTION(always_false)
{
template <class FSM,class EVT,class SourceState,class TargetState>
bool operator()(EVT const&,FSM& fsm,SourceState& ,TargetState& )
{
++fsm.get_attribute(always_false_counter);
return false;
}
};
BOOST_MSM_EUML_ACTION(No_Transition)
{
template <class FSM,class Event>
void operator()(Event const&,FSM&,int)
{
BOOST_FAIL("no_transition called!");
}
};
BOOST_MSM_EUML_TRANSITION_TABLE((
State2 == State1 ,
State3 == State2 / State2ToState3,
State4 == State3 [always_true] / State3ToState4,
State4 == State3 [always_false],
State1 == State4 + event1
// +------------------------------------------------------------------------------+
),transition_table)
// create a state machine "on the fly"
BOOST_MSM_EUML_DECLARE_STATE_MACHINE(( transition_table, //STT
init_ << State1, // Init State
no_action, // Entry
no_action, // Exit
attributes_ << state2_to_state3_counter << state3_to_state4_counter
<< always_true_counter << always_false_counter, // Attributes
configure_ << no_configure_, // configuration
No_Transition // no_transition handler
),
my_machine_) //fsm name
// Pick a back-end
typedef msm::back::state_machine<my_machine_> my_machine;
//static char const* const state_names[] = { "State1", "State2", "State3", "State4" };
BOOST_AUTO_TEST_CASE( my_test )
{
my_machine p;
// needed to start the highest-level SM. This will call on_entry and mark the start of the SM
// in this case it will also immediately trigger all anonymous transitions
p.start();
BOOST_CHECK_MESSAGE(p.current_state()[0] == 3,"State4 should be active"); //State4
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(exit_counter) == 1,
"State1 exit not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(entry_counter) == 1,
"State1 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(exit_counter) == 1,
"State2 exit not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(entry_counter) == 1,
"State2 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(exit_counter) == 1,
"State3 exit not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(entry_counter) == 1,
"State3 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State4)&>().get_attribute(entry_counter)== 1,
"State4 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(always_true_counter) == 1,"guard not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(always_false_counter) == 1,"guard not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(state2_to_state3_counter) == 1,"action not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(state3_to_state4_counter) == 1,"action not called correctly");
// this event will bring us back to the initial state and thus, a new "loop" will be started
p.process_event(event1);
BOOST_CHECK_MESSAGE(p.current_state()[0] == 3,"State4 should be active"); //State4
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(exit_counter) == 2,
"State1 exit not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(entry_counter) == 2,
"State1 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(exit_counter) == 2,
"State2 exit not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(entry_counter) == 2,
"State2 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(exit_counter) == 2,
"State3 exit not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(entry_counter) == 2,
"State3 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State4)&>().get_attribute(entry_counter)== 2,
"State4 entry not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(always_true_counter) == 2,"guard not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(always_false_counter) == 2,"guard not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(state2_to_state3_counter) == 2,"action not called correctly");
BOOST_CHECK_MESSAGE(p.get_attribute(state3_to_state4_counter) == 2,"action not called correctly");
}
}
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