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basic_transitions.cpp
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basic_transitions.cpp
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#include "hsm/hsm.h"
#include <boost/hana.hpp>
#include <boost/hana/experimental/printable.hpp>
#include <gtest/gtest.h>
#include <future>
#include <memory>
namespace {
using namespace ::testing;
using namespace boost::hana;
// States
struct S1 {
};
struct S2 {
};
struct S3 {
};
struct S4 {
};
// Events
struct e1 {
};
struct e2 {
};
struct e3 {
};
struct e4 {
};
struct e5 {
};
struct e6 {
};
// Actions
const auto log = [](auto event, auto source, auto target) {
std::cout << experimental::print(typeid_(source)) << " + "
<< experimental::print(typeid_(event)) << " = "
<< experimental::print(typeid_(target)) << std::endl;
};
struct SubSubState {
static constexpr auto make_transition_table()
{
// clang-format off
return hsm::transition_table(
* hsm::state<S1> + hsm::event<e1> / log = hsm::state<S2>
);
// clang-format on
}
};
struct SubState {
static constexpr auto make_transition_table()
{
// clang-format off
return hsm::transition_table(
* hsm::state<S1> + hsm::event<e1> / log = hsm::state<S2>
, hsm::state<S1> + hsm::event<e5> / log = hsm::state<S3>
, hsm::state<S2> + hsm::event<e1> / log = hsm::state<SubSubState>
, hsm::state<SubSubState> + hsm::event<e2> / log = hsm::state<S1>
);
// clang-format on
}
};
struct MainState {
static constexpr auto make_transition_table()
{
// clang-format off
return hsm::transition_table(
// Source , Event , Target
* hsm::state<S1> + hsm::event<e1> / log = hsm::state<S2>
, hsm::state<S1> + hsm::event<e2> / log = hsm::state<S3>
, hsm::state<S1> + hsm::event<e4> / log = hsm::state<SubState>
, hsm::state<S1> + hsm::event<e5> / log = hsm::state<S3>
, hsm::state<S1> + hsm::event<e6> / log = hsm::state<S1>
, hsm::state<S2> + hsm::event<e1> / log = hsm::state<S1>
, hsm::state<S2> + hsm::event<e2> / log = hsm::state<S1>
, hsm::state<S2> + hsm::event<e3> / log = hsm::state<S3>
, hsm::state<SubState> + hsm::event<e2> / log = hsm::state<S1>
, hsm::state<SubState> + hsm::event<e4> / log = hsm::state<SubState>
);
// clang-format on
}
static constexpr auto on_unexpected_event()
{
return [](auto event, auto /*currentState*/) {
throw std::runtime_error(
std::string("unexpected event ") + experimental::print(typeid_(event)));
};
}
};
}
class BasicTransitionTests : public Test {
protected:
hsm::sm<MainState> sm;
};
TEST_F(BasicTransitionTests, should_start_in_initial_state)
{
ASSERT_TRUE(sm.is(hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_start_in_root_state)
{
ASSERT_TRUE(sm.parent_is(hsm::state<MainState>));
}
TEST_F(BasicTransitionTests, should_process_event)
{
ASSERT_TRUE(sm.is(hsm::state<S1>));
sm.process_event(e1 {});
ASSERT_TRUE(sm.is(hsm::state<S2>));
}
TEST_F(BasicTransitionTests, should_transit_into_SubState)
{
sm.process_event(e4 {});
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_transit_into_SubSubState)
{
sm.process_event(e4 {});
sm.process_event(e1 {});
sm.process_event(e1 {});
ASSERT_TRUE(sm.is(hsm::state<SubSubState>, hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_transit_in_SubState_with_unique_event)
{
sm.process_event(e4 {});
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S1>));
sm.process_event(e5 {});
ASSERT_FALSE(sm.is(hsm::state<SubState>, hsm::state<S1>));
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S3>));
}
TEST_F(BasicTransitionTests, should_exit_substate_on_event_in_parentstate)
{
sm.process_event(e4 {});
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S1>));
sm.process_event(e2 {});
ASSERT_TRUE(sm.is(hsm::state<MainState>, hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_exit_subsubstate_on_event_in_parentstate)
{
sm.process_event(e4 {});
sm.process_event(e1 {});
sm.process_event(e1 {});
ASSERT_TRUE(sm.is(hsm::state<SubSubState>, hsm::state<S1>));
sm.process_event(e2 {});
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_reentry_substate_on_initial_state)
{
sm.process_event(e4 {});
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S1>));
sm.process_event(e1 {});
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S2>));
sm.process_event(e4 {});
ASSERT_TRUE(sm.parent_is(hsm::state<SubState>));
ASSERT_TRUE(sm.is(hsm::state<SubState>, hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_self_transit)
{
ASSERT_TRUE(sm.is(hsm::state<MainState>, hsm::state<S1>));
sm.process_event(e6 {});
ASSERT_TRUE(sm.is(hsm::state<MainState>, hsm::state<S1>));
sm.process_event(e6 {});
ASSERT_TRUE(sm.is(hsm::state<MainState>, hsm::state<S1>));
}
TEST_F(BasicTransitionTests, should_fail_when_access_invalid_region)
{
ASSERT_THROW(sm.is(15, hsm::state<MainState>, hsm::state<S1>), std::out_of_range);
}