etl/test/test_message.cpp

/******************************************************************************
The MIT License(MIT)

Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com

Copyright(c) 2024 John Wellbelove

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******************************************************************************/

#include "unit_test_framework.h"

#include "etl/message.h"

SUITE(test_message)
{
  //*************************************************************************
  TEST(test_message_traits)
  {
    // imessage
    //   ^
    // MessageBase
    //   ^
    // etl::message<I, MessageBase>
    //   ^
    // Message

    //             | is_imessage | is_message | is_message_type | is_message_base | is_user_message_base
    // imessage    |     T       |     T      |     F           |     T           |     F
    // MessageBase |     F       |     T      |     F           |     T           |     T
    // Message     |     F       |     T      |     T           |     F           |     F
    // int         |     F       |     F      |     F           |     F           |     F

    struct MessageBase : public etl::imessage {};
    struct Message : public etl::message<1, MessageBase> {};

#if ETL_USING_CPP17
    // Is an imessage?
    CHECK_TRUE(etl::is_imessage_v<etl::imessage>);
    CHECK_FALSE(etl::is_imessage_v<MessageBase>);
    CHECK_FALSE(etl::is_imessage_v<Message>);
    CHECK_FALSE(etl::is_imessage_v<int>);

    // Is an imessage, or derived from imessage?
    CHECK_TRUE(etl::is_message_v<etl::imessage>);
    CHECK_TRUE(etl::is_message_v<MessageBase>);
    CHECK_TRUE(etl::is_message_v<Message>);
    CHECK_FALSE(etl::is_message_v<int>);

    // Is a concrete message?
    CHECK_FALSE(etl::is_message_type_v<etl::imessage>);
    CHECK_FALSE(etl::is_message_type_v<MessageBase>);
    CHECK_TRUE(etl::is_message_type_v<Message>);
    CHECK_FALSE(etl::is_message_type_v<int>);

    // Is a message base?
    CHECK_TRUE(etl::is_message_base_v<etl::imessage>);
    CHECK_TRUE(etl::is_message_base_v<MessageBase>);
    CHECK_FALSE(etl::is_message_base_v<Message>);
    CHECK_FALSE(etl::is_message_base_v<int>);

    // Is a user message base?
    CHECK_FALSE(etl::is_user_message_base_v<etl::imessage>);
    CHECK_TRUE(etl::is_user_message_base_v<MessageBase>);
    CHECK_FALSE(etl::is_user_message_base_v<Message>);
    CHECK_FALSE(etl::is_user_message_base_v<int>);
#else
    // Is an imessage?
    CHECK_TRUE(etl::is_imessage<etl::imessage>::value);
    CHECK_FALSE(etl::is_imessage<MessageBase>::value);
    CHECK_FALSE(etl::is_imessage<Message>::value);
    CHECK_FALSE(etl::is_imessage<int>::value);

    // Is an imessage, or derived from imessage?
    CHECK_TRUE(etl::is_message<etl::imessage>::value);
    CHECK_TRUE(etl::is_message<MessageBase>::value);
    CHECK_TRUE(etl::is_message<Message>::value);
    CHECK_FALSE(etl::is_message<int>::value);

    // Is a concrete message?
    CHECK_FALSE(etl::is_message_type<etl::imessage>::value);
    CHECK_FALSE(etl::is_message_type<MessageBase>::value);
    CHECK_TRUE(etl::is_message_type<Message>::value);
    CHECK_FALSE(etl::is_message_type<int>::value);

    // Is a message base?
    CHECK_TRUE(etl::is_message_base<etl::imessage>::value);
    CHECK_TRUE(etl::is_message_base<MessageBase>::value);
    CHECK_FALSE(etl::is_message_base<Message>::value);
    CHECK_FALSE(etl::is_message_base<int>::value);

    // Is a user message base?
    CHECK_FALSE(etl::is_user_message_base<etl::imessage>::value);
    CHECK_TRUE(etl::is_user_message_base<MessageBase>::value);
    CHECK_FALSE(etl::is_user_message_base<Message>::value);
    CHECK_FALSE(etl::is_user_message_base<int>::value);
#endif
  }

  //*************************************************************************
  TEST(test_message_base_type)
  {
    struct Message1 : public etl::message<1> {};

    struct MessageBase : public etl::imessage {};
    struct Message2 : public etl::message<2, MessageBase> {};

    CHECK_TRUE((std::is_same<etl::imessage, Message1::base_type>::value));
    CHECK_TRUE((std::is_same<MessageBase,   Message2::base_type>::value));

    CHECK_FALSE((std::is_same<MessageBase,   Message1::base_type>::value));
    CHECK_FALSE((std::is_same<etl::imessage, Message2::base_type>::value));
  }

  //*************************************************************************
  TEST(test_has_message_id)
  {
    struct Message1 : public etl::message<1> {};
    struct Message2 : public etl::message<2> {};
    struct MessageNoID : public etl::imessage {};

    CHECK_TRUE(etl::has_message_id<Message1>::value);
    CHECK_TRUE(etl::has_message_id<Message2>::value);
    CHECK_FALSE(etl::has_message_id<MessageNoID>::value);

#if ETL_USING_CPP17
    CHECK_TRUE(etl::has_message_id_v<Message1>);
    CHECK_TRUE(etl::has_message_id_v<Message2>);
    CHECK_FALSE(etl::has_message_id_v<MessageNoID>);
#endif
  }

  //*************************************************************************
  TEST(test_message_compare_message_id)
  {
    struct Message1 : public etl::message<1> {};
    struct Message2 : public etl::message<2> {};
    struct MessageNoID : public etl::imessage {};

    CHECK_TRUE((etl::compare_message_id_less<Message1, Message2>::value));
    CHECK_FALSE((etl::compare_message_id_less<Message2, Message1>::value));

    // CHECK_FALSE((etl::compare_message_id_less<Message1, MessageNoID>::value)); // Uncomment to trigger static assert.

#if ETL_USING_CPP17
    CHECK_TRUE((etl::compare_message_id_less_v<Message1, Message2>));
    CHECK_FALSE((etl::compare_message_id_less_v<Message2, Message1>));
#endif
  }
}