/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/

/**
* @file 
* @copyright 2022 MPLv2
*/

/**
  * \defgroup class test
  *
  * These scenarios test the class BC::BasicMessageQueue
  */
#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>
#include <BC/BC.hpp>
#include <BC/BasicQueueReceiver.hpp>
#include <exception>
#include <mutex>
#include <thread>
#include <memory>
#include <chrono>

/**
* \brief Verify functional correctness of class BasicQueueReceiver.
* \ingroup  class_test
*
*/
SCENARIO("Testing class BasicQueueReceiver ","[BasicQueueReceiver]")
{
  GIVEN("A BasicQueueReceiver object")
  {
    std::shared_ptr<BC::BasicQueueReceiver> testReceiver = nullptr;
    REQUIRE_NOTHROW( testReceiver = std::make_shared<BC::BasicQueueReceiver>() );
    REQUIRE( 0 == testReceiver->getQueueSize() );

    WHEN("receiving a new message")
    {
      testReceiver->receive( new BC::Message{} );

      THEN("the message queue should not be empty")
      {
        REQUIRE( 1 == testReceiver->getQueueSize() );
      } //THEN
    } // WHEN

    WHEN("receiving a new message")
    {
      testReceiver->receive( new BC::Message{} );

      THEN("the message queue should not be empty")
      {
        REQUIRE( 1 == testReceiver->getQueueSize() );
      } //THEN
    } // WHEN

     WHEN("waiting for new message and appending messages")
    {
      REQUIRE( 0 == testReceiver->getQueueSize() );
      std::thread myTestThread( &BC::BasicQueueReceiver::waitForNewMessage, testReceiver);
      std::this_thread::sleep_for(std::chrono::milliseconds(100));

      THEN("the function should wait for a new message to be received")
      {
        CHECK( true == myTestThread.joinable() );
        auto msg = std::make_unique<BC::Message>();

        testReceiver->receive( new BC::Message{} );
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
        CHECK( 0 == testReceiver->getQueueSize() );
      } //THEN

      myTestThread.join();
    } // WHEN
  } // GIVEN
} //SCENARIO