fsfw/contrib/fsfw_contrib/etl-20.39.4/test/test_delegate_cpp03.cpp

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

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

Copyright(c) 2021 John Wellbelove

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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******************************************************************************/

#include "unit_test_framework.h"

#define ETL_IN_DELEGATE_CPP03_UNIT_TEST

#include "etl/private/delegate_cpp03.h"
#include "etl/vector.h"

#include <vector>
#include <functional>
#include <algorithm>

namespace
{
  //*****************************************************************************
  enum class FunctionCalled : int
  {
    Not_Called,
    Free_Void_Called,
    Free_Int_Called,
    Free_Reference_Called,
    Free_Moveableonly_Called,
    Normal_Called,
    Normal_Returning_Void_Called,
    Alternative_Called,
    Member_Void_Called,
    Member_Void_Const_Called,
    Member_Int_Called,
    Member_Int_Const_Called,
    Member_Reference_Called,
    Member_Reference_Const_Called,
    Member_Moveableonly_Called,
    Member_Static_Called,
    Operator_Called,
    Operator_Const_Called,
    Lambda_Called
  };

  FunctionCalled function_called = FunctionCalled::Not_Called;

  //*****************************************************************************
  const int VALUE1 = 1;
  bool parameter_correct = false;

  //*****************************************************************************
  // Object data structure.
  //*****************************************************************************
  struct Data
  {
    int d;
  };

  //*****************************************************************************
  // The free function taking no parameters.
  //*****************************************************************************
  void free_void()
  {
    function_called = FunctionCalled::Free_Void_Called;
  }

  //*****************************************************************************
  // The free function taking an int parameter.
  //*****************************************************************************
  void free_int(int i)
  {
    function_called = FunctionCalled::Free_Int_Called;
    parameter_correct = (i == VALUE1);
  }

  //*****************************************************************************
  // The free function taking a Data reference parameter.
  //*****************************************************************************
  void free_reference(const Data& data)
  {
    function_called = FunctionCalled::Free_Reference_Called;
    parameter_correct = (data.d == VALUE1);
  }

  //*****************************************************************************
  // The normal function.
  //*****************************************************************************
  int normal(int i)
  {
    function_called = FunctionCalled::Normal_Called;
    parameter_correct = (i == VALUE1);

    return i;
  }

  //*****************************************************************************
  // The normal function returning void.
  //*****************************************************************************
  void normal_returning_void(int i)
  {
    function_called = FunctionCalled::Normal_Returning_Void_Called;
    parameter_correct = (i == VALUE1);
  }

  //*****************************************************************************
  // The alternative function.
  //*****************************************************************************
  int alternative(int i)
  {
    function_called = FunctionCalled::Alternative_Called;
    parameter_correct = (i == VALUE1);

    return i + 1;
  }

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

    //*******************************************
    // void
    void member_void()
    {
      function_called = FunctionCalled::Member_Void_Called;
    }

    void member_void_const() const
    {
      function_called = FunctionCalled::Member_Void_Const_Called;
    }

    //*******************************************
    // int
    void member_int(int i)
    {
      function_called = FunctionCalled::Member_Int_Called;
      parameter_correct = (i == VALUE1);
    }

    void member_int_const(int i) const
    {
      function_called = FunctionCalled::Member_Int_Const_Called;
      parameter_correct = (i == VALUE1);
    }

    //*******************************************
    // reference
    void member_reference(const Data& data)
    {
      function_called = FunctionCalled::Member_Reference_Called;
      parameter_correct = (data.d == VALUE1);
    }

    void member_reference_const(const Data& data) const
    {
      function_called = FunctionCalled::Member_Reference_Const_Called;
      parameter_correct = (data.d == VALUE1);
    }

    //*******************************************
    // static
    static void member_static(const Data& data)
    {
      function_called = FunctionCalled::Member_Static_Called;
      parameter_correct = (data.d == VALUE1);
    }

    //*******************************************
    // operator()
    void operator()()
    {
      function_called = FunctionCalled::Operator_Called;
    }

    void operator()() const
    {
      function_called = FunctionCalled::Operator_Const_Called;
    }
  };

  //*******************************************
  int times_2(int a) 
  {
    return a * 2;
  }

  Object test_static;
  const Object const_test_static;
}

namespace
{
  //*****************************************************************************
  // Initialises the test results.
  //*****************************************************************************
  struct SetupFixture
  {
    SetupFixture()
    {
      function_called   = FunctionCalled::Not_Called;
      parameter_correct = false;
    }
  };

  SUITE(test_delegate)
  {
    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_is_valid_false)
    {
      etl_cpp03::delegate<void(void)> d;

      CHECK(!d.is_valid());
      CHECK(!d);

      CHECK_THROW(d(), etl_cpp03::delegate_uninitialised);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_is_valid_true)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<free_void>();

      CHECK(d.is_valid());
      CHECK(d);
      CHECK_NO_THROW(d());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_is_valid_after_clear)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<free_void>();

      CHECK_TRUE(d.is_valid());
      d.clear();
      CHECK_FALSE(d.is_valid());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_free_void)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<free_void>();

      d();

      CHECK(function_called == FunctionCalled::Free_Void_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_free_int)
    {
      auto d = etl_cpp03::delegate<void(int)>::create<free_int>();

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Free_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_free_reference)
    {
      auto d = etl_cpp03::delegate<void(const Data&)>::create<free_reference>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Free_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_operator_void)
    {
      Object object;

      etl_cpp03::delegate<void(void)> d(object);

      d();

      CHECK(function_called == FunctionCalled::Operator_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_operator_void_create)
    {
      Object object;

      auto d = etl_cpp03::delegate<void(void)>::create(object);

      d();

      CHECK(function_called == FunctionCalled::Operator_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_operator_void_const)
    {
      const Object object;

      etl_cpp03::delegate<void(void)> d(object);

      d();

      CHECK(function_called == FunctionCalled::Operator_Const_Called);
    }

#if !defined(ETL_COMPILER_GCC)
    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_operator_void_compile_time)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<Object, test_static>();

      d();

      CHECK(function_called == FunctionCalled::Operator_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_operator_void_compile_time_const)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<const Object, const_test_static>();

      d();

      CHECK(function_called == FunctionCalled::Operator_Const_Called);
    }
#endif

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assignment_member_operator_void)
    {
      Object object;

      etl_cpp03::delegate<void(void)> d;

      d = object;

      d();

      CHECK(function_called == FunctionCalled::Operator_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_void)
    {
      Object object;

      auto d = etl_cpp03::delegate<void(void)>::create<Object, &Object::member_void>(object);

      d();

      CHECK(function_called == FunctionCalled::Member_Void_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_void_const)
    {
      const Object object;

      auto d = etl_cpp03::delegate<void(void)>::create<Object, &Object::member_void_const>(object);

      d();

      CHECK(function_called == FunctionCalled::Member_Void_Const_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_int)
    {
      Object object;

      auto d = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(object);

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_int_const)
    {
      const Object object;

      auto d = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int_const>(object);

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_reference)
    {
      Object object;
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object, &Object::member_reference>(object);

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_reference_const)
    {
      const Object object;
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object, &Object::member_reference_const>(object);

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_static)
    {
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object::member_static>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Static_Called);
      CHECK(parameter_correct);
    }

#if !(defined(ETL_COMPILER_GCC) && (__GNUC__ <= 5))
    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_void_compile_time)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<Object, test_static, &Object::member_void>();

      d();

      CHECK(function_called == FunctionCalled::Member_Void_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_void_compile_time_new_api)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<Object, &Object::member_void, test_static>();

      d();

      CHECK(function_called == FunctionCalled::Member_Void_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_void_const_compile_time)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<Object, const_test_static, &Object::member_void_const>();

      d();

      CHECK(function_called == FunctionCalled::Member_Void_Const_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_void_const_compile_time_new_api)
    {
      auto d = etl_cpp03::delegate<void(void)>::create<Object, &Object::member_void_const, const_test_static>();

      d();

      CHECK(function_called == FunctionCalled::Member_Void_Const_Called);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_int_compile_time)
    {
      auto d = etl_cpp03::delegate<void(int)>::create<Object, test_static, &Object::member_int>();

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_int_compile_time_new_api)
    {
      auto d = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int, test_static>();

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_int_const_compile_time)
    {
      auto d = etl_cpp03::delegate<void(int)>::create<Object, const_test_static, &Object::member_int_const>();

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_int_const_compile_time_new_api)
    {
      auto d = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int_const, const_test_static>();

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_reference_compile_time)
    {
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object, test_static, &Object::member_reference>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_reference_compile_time_new_api)
    {
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object, &Object::member_reference, test_static>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_reference_const_compile_time)
    {
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object, const_test_static, &Object::member_reference_const>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_member_reference_const_compile_time_new_api)
    {
      auto d = etl_cpp03::delegate<void(const Data&)>::create<Object, &Object::member_reference_const, const_test_static>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_free_int)
    {
      etl_cpp03::delegate<void(int)> d;
      
      d.set<free_int>();

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Free_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_lambda_int)
    {
      etl_cpp03::delegate<void(int)> d;
      
      d.set([](int i) { function_called = FunctionCalled::Lambda_Called; parameter_correct = (i == VALUE1); });

      d(VALUE1);

      CHECK(function_called == FunctionCalled::Lambda_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_member_reference)
    {
      Object object;
      etl_cpp03::delegate<void(const Data&)> d;
      
      d.set<Object, &Object::member_reference>(object);

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_const_member_reference)
    {
      Object object;
      etl_cpp03::delegate<void(const Data&)> d;

      d.set<Object, &Object::member_reference_const>(object);

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_member_reference_compile_time)
    {
      etl_cpp03::delegate<void(const Data&)> d;

      d.set<Object, test_static, &Object::member_reference>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_member_reference_compile_time_new_api)
    {
      etl_cpp03::delegate<void(const Data&)> d;

      d.set<Object, &Object::member_reference, test_static>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_member_reference_const_compile_time)
    {
      etl_cpp03::delegate<void(const Data&)> d;

      d.set<Object, const_test_static, &Object::member_reference_const>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Const_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_set_member_reference_const_compile_time_new_api)
    {
      etl_cpp03::delegate<void(const Data&)> d;

      d.set<Object, &Object::member_reference_const, const_test_static>();

      Data data;
      data.d = VALUE1;

      d(data);

      CHECK(function_called == FunctionCalled::Member_Reference_Const_Called);
      CHECK(parameter_correct);
    }
#endif

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_copy_construct)
    {
      Object object;

      auto d1 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(object);
      auto d2(d1);

      d2(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_assignment)
    {
      Object object;

      auto d1 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(object);
      etl_cpp03::delegate<void(int)> d2;

      d2 = d1;

      d2(VALUE1);

      CHECK(function_called == FunctionCalled::Member_Int_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_delegate_equal)
    {
      Object object;

      auto d1 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(object);
      auto d2 = d1;

      CHECK(d1 == d2);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_delegate_not_equal)
    {
      Object object;

      auto d1 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(object);
      auto d2 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int_const>(object);;

      CHECK(d1 != d2);
    }

    //*************************************************************************
    TEST(test_issue_418)
    {
      etl::vector<etl_cpp03::delegate<int(int)>, 5> vector_of_delegates;

      vector_of_delegates.push_back(etl_cpp03::delegate<int(int)>::create<times_2>());

      CHECK_EQUAL(42, vector_of_delegates.front()(21));
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_or_run_time_normal)
    {
      etl_cpp03::delegate<int(int)> d = etl_cpp03::delegate<int(int)>::create<normal>();

      int result = d.call_or(alternative, VALUE1);

      CHECK_EQUAL(VALUE1, result);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_or_run_time_alternative)
    {
      etl_cpp03::delegate<int(int)> d;

      int result = d.call_or(alternative, VALUE1);

      CHECK_EQUAL(VALUE1 + 1, result);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_or_compile_time_alternative)
    {
      etl_cpp03::delegate<int(int)> d;

      int result = d.call_or<alternative>(VALUE1);

      CHECK_EQUAL(VALUE1 + 1, result);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_or_delegate_alternative)
    {
      etl_cpp03::delegate<int(int)> d;

      auto alt = etl_cpp03::delegate<int(int)>::create<alternative>();

      int result = d.call_or(alt, VALUE1);

      CHECK_EQUAL(VALUE1 + 1, result);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_if_and_valid)
    {
      auto d = etl_cpp03::delegate<int(int)>::create<normal>();

      etl::optional<int> result = d.call_if(VALUE1);

      CHECK(bool(result));
      CHECK_EQUAL(VALUE1, result.value());
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_if_and_not_valid)
    {
      etl_cpp03::delegate<int(int)> d;

      etl::optional<int> result = d.call_if(VALUE1);

      CHECK(!bool(result));
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_if_and_valid_returning_void)
    {
      auto d = etl_cpp03::delegate<void(int)>::create<normal_returning_void>();

      bool was_called = d.call_if(VALUE1);

      CHECK(was_called);
      CHECK(function_called == FunctionCalled::Normal_Returning_Void_Called);
      CHECK(parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_call_if_and_not_valid_returning_void)
    {
      etl_cpp03::delegate<void(int)> d;

      bool was_called = d.call_if(VALUE1);

      CHECK(!was_called);
      CHECK(function_called == FunctionCalled::Not_Called);
      CHECK(!parameter_correct);
    }

    //*************************************************************************
    TEST_FIXTURE(SetupFixture, test_delegate_identification)
    {
      Object test1;
      Object test2;

      auto d1 = etl_cpp03::delegate<void(int)>::create<free_int>();
      auto d2 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(test1);
      auto d3 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(test2);

      etl_cpp03::delegate<void(int)> d4;

      using Delegate_List = std::vector<etl_cpp03::delegate<void(int)>>;

      Delegate_List delegate_list = { d1, d2, d3 };

      Delegate_List::const_iterator itr;

      d4 = d1;

      itr = std::find(delegate_list.begin(), delegate_list.end(), d4);
      CHECK(*itr == d1);
      CHECK(*itr != d2);
      CHECK(*itr != d3);

      d4 = d2;

      itr = std::find(delegate_list.begin(), delegate_list.end(), d4);
      CHECK(*itr != d1);
      CHECK(*itr == d2);
      CHECK(*itr != d3);

      d4 = d3;

      itr = std::find(delegate_list.begin(), delegate_list.end(), d4);
      CHECK(*itr != d1);
      CHECK(*itr != d2);
      CHECK(*itr == d3);

      d4 = etl_cpp03::delegate<void(int)>::create<Object, &Object::member_int>(test2); // Same as d3
      itr = std::find(delegate_list.begin(), delegate_list.end(), d4);
      CHECK(*itr != d1);
      CHECK(*itr != d2);
      CHECK(*itr == d3);
    }
  };
}