etl/test/test_delegate_service_compile_time.cpp

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

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

Copyright(c) 2019 jwellbelove

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#include "unit_test_framework.h"

#include "etl/delegate.h"
#include "etl/delegate_service.h"

#if !defined(ETL_DELEGATE_FORCE_CPP03_IMPLEMENTATION)

namespace
{
  const size_t Size   = 2UL;
  const size_t Offset = 5UL;

  using Service = etl::delegate_service<Size, Offset>;

  //*****************************************************************************
  bool global_called    = false;
  bool member_called    = false;
  bool unhandled_called = false;
  size_t called_id      = UINT_MAX;

  //*****************************************************************************
  // The global function taking no parameters.
  //*****************************************************************************
  void global(size_t id)
  {
    global_called = true;
    called_id     = id;
  }

  //*****************************************************************************
  // The external unhandled callback.
  //*****************************************************************************
  void unhandled(size_t id)
  {
    unhandled_called = true;
    called_id        = id;
  }

  //*****************************************************************************
  // The test class with member functions.
  //*****************************************************************************
  class Test
  {
  public:

    Test()
    {
    }

    void member(size_t id)
    {
      member_called = true;
      called_id      = id;
    }
  };

  Test test;

  // Callback for 'member'.
  constexpr etl::delegate<void(size_t)> member_callback = etl::delegate<void(size_t)>::create<Test, test, &Test::member>();

  // Callback for 'global'.
  constexpr etl::delegate<void(size_t)> global_callback = etl::delegate<void(size_t)>::create<global>();

  // Callback for 'unhandled'.
  constexpr etl::delegate<void(size_t)> unhandled_callback = etl::delegate<void(size_t)>::create<unhandled>();

  constexpr etl::delegate<void(size_t)> delegate_list[]
  {
    global_callback,
    member_callback,
    unhandled_callback
  };

  //*****************************************************************************
  // Initialises the test results.
  //*****************************************************************************
  struct SetupFixture
  {
    SetupFixture()
    {
      called_id        = UINT_MAX;
      global_called    = false;
      member_called    = false;
      unhandled_called = false;
    }
  };
}

namespace
{
  enum
  {
    Global = Offset,
    Member,
    Out_Of_Range
  };

  SUITE(test_delegate_service)
  {
    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_delegate_compile_time_constexpr)
    {
      etl::delegate_service<Size, Offset, delegate_list> service;

      service.call<Global>();
      CHECK_EQUAL(Global, called_id);
      CHECK(global_called);
      CHECK(!member_called);
      CHECK(!unhandled_called);

      called_id = UINT_MAX;
      global_called = false;
      member_called = false;
      unhandled_called = false;

      service.call<Member>();
      CHECK_EQUAL(Member, called_id);
      CHECK(!global_called);
      CHECK(member_called);
      CHECK(!unhandled_called);

      called_id = UINT_MAX;
      global_called = false;
      member_called = false;
      unhandled_called = false;

      service.call(Out_Of_Range);
      CHECK_EQUAL(Out_Of_Range, called_id);
      CHECK(!global_called);
      CHECK(!member_called);
      CHECK(unhandled_called);
    }
  };
}

#endif